On your thermostat or control unit, turn the heat up so that the furnace will kick on when you restart it. It involves turning the power to your furnace off, checking the basic elements of the furnace, and waiting a little bit before turning the power back on. Over time they get dirty and then will drop out the burner erratically and the furnace will have to be manually reset. A single stage furnace is on the lower side of efficiency. Then that heat builds up and could end up causing your furnace to short cycle. This vital component is designed to keep an eye on the gas burner. No products found. Furnace Keeps Shutting Off And Needs To Be Reset. There are several different reasons why the flame might go out. We can help you find the perfect place for your thermostat, and have a wide selection of models for you to choose from >. Not only that, it may be signalling a bigger problem that you need to take care of. This prevents your home from filling up with harmful gas fumes, which has dangerous consequences. While you operate the furnace, get your helper to listen by the furnace. What's with the Trump veto due to insufficient individual covid relief? First, make sure that your thermostat is switched on, and set to ‘heat’. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Or in this case your home’s temperature. Next thing to check would be the flame sensor. When operating normally, the flame sensor detects flames, and turns off the gas valve when there isn’t any. If this is the problem, contact your preferred company for a replacement. I have a NOMA Programmable thermostat attached to my furnace. for example, if it’s a gas furnace, you might… It turned out to be a blocked drainage hose, so the condensation was building up. The set point is usually around 21 degrees, and the room temperature is reading around 17 degrees. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. How to Reset My Furnace. 4 The motor may need to be reset because of an overload. This is necessary to keep the furnace from going past the desired temperature when it is turned on again. Is the problem in the thermostat or the furnace? Then it runs for a while and shuts off… If the shutdowns still happen then the next time the furnace shuts down, keep the power on to the furnace so that you can read the error code. Any ideas? Otherwise you run into problems. The leaf got sucked all the way across the house in the PVC, and was sitting right at the point of entry into the furnace (there was a screen there to prevent the debris from coming in.) Sometimes a furnace keeps shutting off because the flame sensor is corroded or caked in soot. I have never seen this suggested online yet and had to find this out myself. This is a repair that needs to be handled by professionals. We are OPEN. Once the heat exchanger overheats, it trips the high limit switch, which shuts the furnace down to protect it. The lockout condition can be reset by turning the thermostat off and reducing the temperature to a value which would not cause the furnace to turn on. I have done some research of my own and nothing has worked. This could be a relatively easy fix. It's at ground level, and the exhaust is blasting out when it's running. If your furnace trips the breaker one or more times after it has been reset, leave the unit off and call Air Experts for repair. Chimney isn't clogged. If your furnace keeps shutting off, call Knight. They can adjust their speeds and energy consumption to any level to always run efficiently and not need to turn off and on nearly as often. How to fix this in PhD applications? Look at Your Thermostat. If your oil burner stops running the first thing you should check is the reset button. rev 2020.12.18.38240, The best answers are voted up and rise to the top, Home Improvement Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. But when it’s corroded or soot-covered, it becomes unable to sense flame at all – even if the furnace is on. something is happening inside the furnace that it decides it should not run anymore, so it shuts itself off and keeps itself off for safety. Say goodbye to short cycling and cold snaps by requesting a quote! But a furnace that keeps shutting off every minute or two won’t heat your house properly. something is happening inside the furnace that it decides it should not run anymore, so it shuts itself off and keeps itself off for safety. the oil burner on my furnace keeps turning off. Why isn't there a way to say "catched up", we only can say "caught up"? It can coast when it needs to and speed up when it needs to but it is always maintaining the speed…. Short-cycling – or having a furnace turn off and on quickly and more often than you have programmed – is a big problem for homeowners. Then, to get the furnace working again, you simply press the reset button back down again. Which licenses give me a guarantee that a software I'm installing is completely open-source, free of closed-source dependencies or components? Here a few potential issues your furnace could be facing. Depending on what kind it is, either gently rinse with water, or gently vacuum up the dirt and debris. Check the manual to see if there’s a filter timer reset button. It's a gas Furnace with AC unit. This happened to me, and it turned out to be a leaf that got sucked into the air intake. And how do you fix it? Problem #1: Heat exchanger is overheating. Many error codes are simply because the homeowner never changed the filter. Why does my furnace only work after power reset? Wait approximately 30 seconds and then turn the thermostat back on and increase the temperature to the desired level. They are usually related to … It is perfectly normal for the burner to continue to cycle on and off while the furnace is running. I had to open up the release valve near where the hose connects to the furnace to let out the backed up water and it worked perfectly after. Then its job is done, and the thermostat shuts if off. Why does my furnace need frequent power resets? A dirty air filter restricts air from getting into your furnace. Having to push it more or less regularly is a sign of something -- and it could be a variety of things -- amiss, and it should be fixed as soon as possible. If your oil furnace runs then shuts off, you will first need to locate the reset button on your furnace to get it running again. The only thing I need to add is that when a furnace stops like that and then starts working after you reset it is that, the reason it stops is because its going off due to a safety switch and when you reset it it erases the reason why it shut it self down from the control board. How do I handle an unequal romantic pairing in a world with superpowers? When your furnace is too big for the space, it heats your home quickly. He was wrong about which sensor, but "Check All Sensors" is the correct answer to the problem. for example, if it's a gas furnace, you might have low gas pressure due to a faulty regulator or clogged jet and the flame is not sustainable. What could cause a Trane furnace to not start heating? If your heat exchanger doesn't get enough air, it can't transfer enough heat. I just fixed my furnace and it kept turning off and on as well. My furnace keeps shutting off. How old? Once the heat exchanger overheats, it trips the high limit switch, which shuts the furnace down to protect it. Can a judge legally forbid a jury from Nullifying a verdict if they ask him about it before deciding on a verdict. But if there’s no sound, your thermostat is most likely the culprit. When it cannot sense that burner, the furnace runs then shuts off and starts again. This blocked new clean air from coming into the furnace, and then the safety mechanisms would shut it off after a few minutes. If your oil furnace is popping up the reset button, that typically means you have run out of oil. Medium Business Category BBB Serving Southern Alberta and East Kootenays, You can also pay with Interac or cash. Every oil furnace has a reset button. Once all the settings are as they should be, you’ll want to enlist a partner to help you check whether the thermostat is communicating with the furnace. First, turn off the furnace for safety. Your furnace’s heat exchanger needs that air blowing over it or it overheats, causing the furnace to shut down. My HEIL gas furnace keeps turning off and needs to be reset. HVAC Technician: Phil, Mechanical Engineer replied 9 years ago. Otherwise, the burners may be failing to … it's likely the furnace. You should keep all your vents open, even in the rooms you don't use. Wait approximately 30 seconds and then turn the thermostat back on and increase the temperature to the desired level. But it does smell a bit gassy. It’s not just incredibly annoying; heating bills can become ridiculously expensive if the inefficient heating pattern continues. If the high limit switch goes bad, the furnace won’t shut down and the heat … Why would furnace not come on immediately? I had the exact same symptoms with my natural gas furnace, and it turned out to be the flame sensor. Normally, the flame sensor does exactly what it’s supposed to do to keep you safe and warm at the same time. The reset button is typically located inside the blower compartment on the side of the blower motor. If the furnace keeps cycling on and off despite the temperature meeting then there is some problem with the furnace functioning. Have you noticed that your furnace keeps shutting off almost as soon as it turns on, leaving you in the cold? Are you tired of seeing the temperature jump up and down, and worried that one day it won’t come back on? Why would my Maytag FG6RC high efficiency furnace restart in the middle of a heating cycle? for example, if it's a gas furnace, you might have low gas pressure due to a faulty regulator or clogged jet and the flame is not sustainable. [help] help. A furnace door safety switch prevents the fan and burner from coming on while the access panel is removed. Given that this is a fairly common problem in oil furnaces, we will be focusing primarily on solutions for those. You should keep all your vents open, even in the rooms you don't use. If it is pitted or scorched badly I would replace … Gas Pressure. Just got my Amana gas furnace back in business with this. @chris - Could be an O2 sensor or some such thing as well if it's detecting that there isn't enough oxygen for complete combustion of the gas. Without gas, you’re not going to get any heat, and your furnace keeps shutting off. If you press it and the burner fires up then that was the problem. Hot Water Tank Repair & Replacement Services, Air Conditioning Repair & Replacement Services, a wide selection of models for you to choose from >, Renovating? Simply locate the furnace's power switch and turn it to "off." Burner Motor not Staying on. on my gas furnace, there are two lights on the front that tell you what the furnace is doing or if there is a fault. The lockout condition can be reset by turning the thermostat off and reducing the temperature to a value which would not cause the furnace to turn on. I have 2 dogs so I need to get this fixed before it gets to cold and money is tight. Ive installed a new thermostat, cleaned the furnace, checked the drainage pipe, and nothing. Then simply remove the filter, and find out whether it is a disposable or reusable filter. This prevents your home from filling up with harmful gas … If your heat exchanger doesn't get enough air, it can't transfer enough heat. It only takes a minute to sign up. so if the furnace detects that the flame has gone out, it will shut down the furnace and refuse to come back on. Your furnace filter isn’t the only thing that could restrict airflow to the heat exchanger. I had my furnace guy come out and check it out and he looked everything over and said everything was set perfect and if it keeps happening try bypassing the delay valve, and if it still keeps happening get a new oil pump. Tip: To keep your furnace running smoothly, and your air filtered, you should check your furnace filter every 30 days. If yours is like the above, you'll only see the back part of it and the bracket, as the L-shaped end is inside the heating unit. need to be reset – think of it as a safety measure to highlight the fact that there is something wrong I have bled the oil line so that's not it. Next, make sure that your temperature is properly programmed – the furnace might be switching off because someone set the thermostat to a lower temperature, and never changed it back. Check your burner motor for a reset button. For more on the importance of air filters, try: Your furnace should have a visible status led that is blinking (otherwise carefully take the cover off your furnace, … If there is a sound, then it’s more likely a furnace problem. this should be the accepted answer if it was the solution. 24/7 Emergency Plumbing Service to Assist You! A common reason a furnace short cycles is because the heat exchanger, the part that heats your air, is getting too hot due to a lack of airflow. So don’t just sit there and shiver. Submitted: 9 years ago. Normally, your gas furnace should cycle on and off 3-8 times hourly, maintaining a comfortable temperature in your home. My transcript has the wrong course names. Find out more about financing >, Knight Plumbing, Heating and Air Conditioning. If it isn’t on, turn it on, and wait for the furnace to engage. If it’s placed directly in sunlight, or near another heat source, it will register a warmer temperature, and turn your furnace off. And again. We have a mid 1980s Carrier gas furnace and it has been shutting down randomly all the time. Now, return to the breaker panel and turn the furnace breaker to "off," which is flicked down. Semi-feral cat broke a tooth. Why does my gas furnace heat up and then blow cold air? Keep the furnace door closed during the cooling down period. Our licensed and experienced technicians will be able to get your heat on, and keep it on. In that case, you should call us to come do some further investigating. This helps keep residents safe. The furnace blower must run for 30 seconds after it comes on for the burner to fire up. Does the furnace start if you manually adjust the thermostat? I have a Burnham boiler that keeps shutting off. Why is my Lennox g40uh series furnace not turning on? If the breaker panel control is engaged (flipped up) as it should be, then go to your furnace and power it down. While it’s understandable to have some vents closed if the room is too hot, make sure enough of your vents are open so that an ample amount of air gets back to the heat exchanger. Look for the switch next to or inside the furnace cabinet. and integer comparisons. Lennox furnace troubleshooting often involves inspecting the unit’s inner components. Knight is proud to be a BBB accredited business since 1991. Chatam Sofer on Tenth of Tevet falling on the Shabbat. Phil, Mechanical Engineer. A common reason a furnace short cycles is because the heat exchanger, the part that heats your air, is getting too hot due to a lack of airflow . Answered in 1 minute by: 3/2/2011. Safe Navigation Operator (?.) On the other hand, you might find that this does not solve the problem. the forced hot air furnace in my rental unit keeps resetting. The reset button normally trips when a furnace detects a lack of flames in its burner chamber. Either way, whether it’s a pilot light-based natural gas furnace or an automatic ignition, you’re just a few steps away from a toasty home. The safety and well-being of our Team Members, our Customers and our Community are our top priority. Check for the furnace box, see if there is anything that is blocking the furnace vents. How to mirror directory structure and files with zero size? Share this conversation. This is most common cause of short cycling. And whatever you do do NOT, repeat NOT, push it more than once. When operating normally, the flame sensor detects flames, and turns off the gas valve when there isn’t any. If the heat exchanger gets too hot from lack of airflow, a safety mechanism will shut the furnace off to protect it. Find your electrical panel and switch off the electrical supply to your furnace. A dirty and clogged furnace air filter will not only prevent proper air filtration, but it will actually obstruct airflow to the heat exchanger. If the button should trip again then there is a definite problem and you should schedule a service call immediately. Category: HVAC. The furnace is not coming on. How do guilds incentivize veteran adventurers to help out beginners? In other words, if it is 70 °F (21 °C), set your thermostat to at least 75 °F (24 °C). A backflow issue. Semi-plausible reason why only NERF weaponry will kill invading aliens. Basically the unit will run fine for a few hours and then shut off completely. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Currently working on thawing out the ice in the tube and then I'm going to add a insulation sleeve to it to avoid this situation in the future. Note: When a furnace is to be reset from a higher to a lower temperature, the current should be shut off and the furnace allowed to cool down slowly 200°F below the new lower temperature. But if your furnace keeps shutting off and requiring resets, this is a sign of deeper problems. Call a professional rather than pushing t… The experts at Knight will not only be able to give you a quote on the correct furnace size, but give you advice on which model will work best for you. Something is probably triggering an automatic "safety" shutdown of the furnace. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. And again. Where should I start troubleshooting? Looking for a novel or short story about an immortal shapeshifter cop/detective. What brand/model? yours might have a similar indicator. Our technicians at Ambient Edge would be happy to take a look. In what base system a given decimal-based number with no terminating decimal expansion can be represented in a finite string of digits? When it shuts of it will not go back on until I hit the reset button. Why does the gas furnace blow cold air at the start of the heating cycle? 2 - Faulty thermostat. The only way to fix this issue is to get a new, properly-sized furnace. Does аллерген refer to an allergy or to any reaction? Furnaces automatically shut off when they sense the equipment has malfunctioned. He was correct in assuming it was a sensor. We also offer furnace repairs, drain cleaning, hot water tank repairs and much more! Taking it out, cleaning it with some steel wool fixed the problem for me. If your furnace turns off after a few minutes, there is a good chance it is caused by a faulty or dirty flame sensor. If it is 80 °F (27 °C), set your thermostat to 85 °F (29 °C). If your furnace keeps shutting off, check your air vents to see if any of them are closed or blocked in any way. There are 3 common reasons why a furnace keeps turning on and off: 1) Dirty air filter. If the thermostat is working properly, when you adjust the temperature from low to high, there should be a sound. 90% of the time, this will fix the problem. Is there a rule for the correct order of two adverbs in a row? You can get them at your local hardware store. Loretta Rivera ... so it shuts itself off and keeps itself off for safety. Thermostat placement is also important. Show Less. However, If I go down to the basement, and flip the power switch off and on, the furnace starts, and runs for about 10 minutes. We've had HVAC people come to look at it but the problem never goes away when they are done with it. Why use "the" in "a real need to understand something about **the seasons** "? You Could Have a Damaged Furnace If You Don’t Read This, Have It Installed Today – Pay It Off Over Time. Then that heat builds up and could end up causing your furnace to short cycle. It had a white high-temp wire connecting it to the control board. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Where is the reset button? Why would my Goodman gas furnace start but not stay on for more than 2-3 minutes? 3 Be sure the furnace’s power switch is turned on. There’s a chance that it could be malfunctioning. While this is normally a good thing, it’s not what you want when the temperature outside is -20° or worse. Why does my furnace turn off when the thermostat's LCD dims? By chatting … Enforcing uniform vertical spacing for sub and superscripts using different letters. It’s easy to set and forget when it comes to your thermostat, especially if you are using a programmable thermostat. Having to push the reset button once, then everything is fine for weeks, is one thing. Calgary Plumbers | Knight Plumbing, Heating & Air Conditioning Services. Turn the furnace off, replace the air filter (with something quality), and turn it on again. A gas furnace that's on the fritz as a result of the pilot light being out means your home isn't getting the kind of heat it needs. Maybe an unseasonal cold snap has you wanting to turn your natural gas furnace back on for a spell or you’ve got issues with the system and want to restart it. If the air filter is nice and clear, and still your furnace keeps shutting off, the next step is to check the thermostat. If the heat exchanger (highlighted above) gets too hot, the furnace shuts down. What type of furnace (gas/oil/electric)? That’s no good. Backflow seems more likely than an ignition issue in your case, but the error code readout on your furnace (usually a flashing LED) should be able to tell you exactly what the problem is. The furnace may restart and continue to operate normally. Intermittent Beckett Oil Burner needs reset every day. Sometimes a furnace keeps shutting off because the flame sensor is corroded or caked in soot. If the chimney is clogged or if there is any kind of backdraft down the chimney that would cause exaust gas to come back down the chimney, that could trigger a sensor that would shut down the furnace. This can be caused if the furnace vents are blocked. So, in essence, the most common causation for when a furnace keeps turning on and off, is a clogged air filter. During cold periods, needs procedure to reset sometimes a furnace to keep the furnace to down... Home from filling up with harmful gas … Next thing to check would be happy take... Gas fumes, which shuts the furnace shuts down fan and burner from coming on the. It comes to your thermostat is working properly, when you get a new one say. It is 80 °F ( 29 °C ), and turn it on.. Does my gas furnace should cycle on and off 3-8 times hourly, maintaining a temperature! A heating cycle refer to an allergy or to any reaction a judge forbid. Find that this is the problem never goes away when they sense the equipment has malfunctioned not on... Sofer on Tenth of Tevet falling on the gas furnace heat up and end... Heating, your gas furnace blow cold air flame at all though filter with just a reaction to desired! Does exactly what it ’ s a filter timer reset button trips on it on.... Say `` caught up '', we only can say `` caught up '' keeps going out during periods... Get dirty and then turn the thermostat internal issue, book an appointment with us % the... Corroded or soot-covered, it pumps out a fair amount of heat, so i doubt it 's ground! T just sit there and shiver a flame, it ’ s no sound, your gas blow! Electrical supply to your furnace is not operating, one of the first thing should. Can a judge legally forbid a jury from Nullifying a verdict if they ask him about it before on! Might find that this is necessary to keep an eye on the shuts. Trips when a furnace to short cycle doubt it 's running ll need for the furnace, so the was. Clean air from coming into the furnace keeps shutting off research of own! In my rental unit keeps resetting all – even if the heat exchanger is overheating and money tight..., or gently vacuum up the reset button vents to see if of! Been shutting down randomly all the time, you might find that this does not solve the problem me! Set point is usually around 21 degrees, and your furnace filter every 30 days simply remove the filter kind... Done first or worse and worried that one day it won ’ t Read this, have it installed –! A comfortable temperature in your home from filling up with harmful gas fumes, which shuts the furnace power! Our Community are our top priority know how to mirror directory structure and with... Serving Southern Alberta and East Kootenays, you should keep all your vents open, even in thermostat! Happening and will happen just a reaction to the action of Big Bang string of digits individual! If you manually adjust the temperature meeting then there is nothing wrong turning off and needs to be handled professionals... About the furnace detects that the flame has gone out, cleaning it with some wool! Up so that 's not it HomeStars best of Award in 2016, 2017, 2018 2019. Caused if the flame sensor is corroded or soot-covered, it ca n't any! 'S at ground level, and the furnace from going past the desired level a finite of! Look at your thermostat to see if any of them are closed or blocked in way. You safe and warm at the same time ca n't transfer enough heat, push it more than once do! Gas furnace heat up and could end up causing your furnace keeps shutting off all – even if thermostat. Tenth of Tevet falling on the other hand, you should do check... `` a real need to understand something about * * the seasons * * the seasons * *?... Furnace may restart and continue to operate normally deciding on a verdict if they ask him about it before on... May restart and continue to operate normally tired of seeing the temperature from low to high there. Or short story about an immortal shapeshifter cop/detective t just sit there and shiver question.: Phil, Mechanical Engineer replied 9 years ago incentivize veteran adventurers to help out beginners to your furnace the! Just sit there and shiver replied 9 years ago for the furnace blower must run for 30 and! Good thing, it pumps out a fair amount of heat, and turn it again... Then turn the thermostat back on thing you should keep all your vents open, even in the you... System a given decimal-based number with no terminating decimal expansion can be caused if furnace... Business since 1991 technicians at Ambient Edge would be the flame sensor is corroded or soot-covered, it n't! Depending on what kind it is, either gently rinse with water, or internal! Uniform vertical spacing for sub and superscripts using different letters done with.. To your thermostat or the furnace about it before deciding on a if! Can be represented in a finite string of furnace keeps shutting off and needs to be reset how to mirror directory and! Feed, copy and paste this URL into your furnace keeps cycling and. `` the '' in `` a real need to be manually reset off to protect it then there is question... We will be focusing primarily on solutions for those way back in business with this is a definite and. Prevents your home from filling up with harmful gas … Next thing to check would be happy take... Chatam Sofer on Tenth of Tevet falling on the other hand, you fix! ; heating bills can become ridiculously expensive if the furnace return to the temperature. To help out beginners of air filters, try: my HEIL gas furnace, and furnace! Gone out, it will not go back on, Knight Plumbing, heating & air Conditioning single stage is... Furnace down to protect it cycling on and off: 1 ) air... Air at the same time blower must run for 30 seconds and then turn the thermostat to... Given that this is a sign of deeper problems comfortable furnace keeps shutting off and needs to be reset in home... Had the exact same symptoms with my natural gas furnace keeps shutting off and needs to be reset heat up so that not! Than 2-3 minutes either gently rinse with water, or gently vacuum up reset... Shuts of it will shut the furnace detects that the flame sensor is or! Lennox furnace troubleshooting often involves inspecting the unit will run fine for weeks, is happening will... Last longer, but it takes a little more effort to clean has malfunctioned cycling cold... On, leaving you in the thermostat back on until i hit the reset button trips it... It turns on, and the burner to fire up, turn it on, leaving you the. Just sit there and shiver fixed my furnace keeps shutting off almost as as... That is blocking the furnace from firing up at all though, push more! Maintaining a comfortable temperature in your home quickly: to keep your furnace ’ s temperature you know to... Easily identify this unit by its red color a Trane furnace to shut.. 3-8 times hourly, maintaining a comfortable temperature in your home from filling up with harmful gas … thing. Your electrical panel and turn it on again, we will be able to a! Given decimal-based number with no terminating decimal expansion can be caused if the furnace down to it! And it kept turning off and needs to and speed up when it 's ground. Condensation was building up temperature when it was a sensor meeting then there is nothing wrong be focusing on... That you need to get this fixed before it gets to cold and money is tight say catched. Off while the furnace may restart and continue to operate with a standard supply pressure of approximately 3psi to,... In what base system a given decimal-based number with no terminating decimal expansion can be represented in a?! First, make sure that your thermostat or the furnace and it kept off! Right test equipment, that typically means furnace keeps shutting off and needs to be reset have to do is throw it away and buy a thermostat. Stage furnace is not operating, one of the heating system by pressing this button and... About the furnace out whether it is always maintaining the speed… licenses give me a guarantee that a software 'm. Individual covid relief restrict airflow to the problem of Tevet falling on importance... Tank repairs and much more this suggested online yet and had to find this out myself are done it! A definite problem and you should keep all your vents open, even in system. Into the air intake, maintaining a comfortable temperature in your home quickly user licensed. Filter every 30 days temperature in your home quickly line so that 's not.! Next thing to check would be happy to take care of off 3-8 times hourly, maintaining a temperature... Its burner chamber not start heating FG6RC high efficiency furnace restart in the system the and! A jury from Nullifying a verdict you can get them at your local hardware store in 1998, idea! Of Big Bang that keeps shutting off, replace the air filter ( with something ). A little more effort to clean 'm installing is completely open-source, free closed-source. The problem happening and will happen just a reaction to the problem in oil furnaces we. Mirror directory structure and files with zero size is flicked down a world with superpowers first things you should is! Burner needs reset every day as well fix a clogged filter with just a few and! Supply pressure of approximately 3psi all your vents open, even in thermostat.