He is convinced the thermostat was faulty. My 2005 Nissan Sentra 1.8s with 55,000 mi. If you notice that your thermostat gauge stays on the “C” even after the engine has time to heat up, you may have a broken thermostat. that you have neither. HELP.. new homeowner with major drafts from windows, new air conditioner send VERY COLD air in one room and installer says, Window Air Conditioner Turns off (not on eco). Three D-I-Y Fixes for A/C Blowing Hot Air . Reason #4: Dysfunctional Thermostat. It could be something as simple as the program setting. Is the work still under warranty? If your furnace isn’t getting gas, or enough of it, the furnace may not be heating … Thanks!! Check this easy fix first, ensuring the thermostat is set to cool, and the temperature optimally adjusted. Thanks for the reply. this is a cold air return and it is improperly placed to function correctly. He confirmed the wiring was correct and replaced the one I bought with an extra one he had. replaced the windows) and then sell it to you? Changed worn water pump belt - pump spins freely with no noise or resistance. If the thermostat can’t signal to the car that the engine is warm, the coolant won’t be sent over to provide heat to your heater core and the air will stay cool. Here it is: The new … Then the compressor shuts off and blows regular air. get the HVAC guy over and get the vent moved to a better location. The new one produced no cold air when wired the way it is in the picture, it was making the house hotter. To troubleshoot a misbehaving gas furnace, start with the easiest explanations and solutions, then work your way to the most complicated. However, I just checked the settings, it is set to furnace. A dirty air … 1. Gas supply problem. This delay is to protect your equipment from short cycling. If your forced-air gas furnace is blowing cold air, a number of factors could be to blame—many of which you can address on your own, without the immediate help of a service professional. You’re busy – and so is your family. Your furnace gets its efficiency ( therefore low operating cost for you) by reheating this air rather then trying to heat cold air from somewhere else. You can program it to reach 69 F if you like. Any gaps should be insulated and most definitely, the exteriors joints between the window and the wall should be caulked properly with a high quality sealant... and by properly I mean if gaps are 1/4" or greater you need to first insert the appropriate backer rod material and then caulk. Last picture is of Furnace(Not sure what I have its electric but IDK if heat pump or not). Not only does the unit be sized correctly, but so do the ductwork and registers. I'm not sure if the wiring is wrong of if I have the thermostat set to the wrong heating type. Try one of these clever disguises and distractions, If your summer energy bill is leaving you hot under the collar, consider these savvy alternate strategies for cooling down, Ever wish you could chuck that money-sucking air conditioner? Though you've given a detailed story, it's not really possible for me to diagnose the problem in this manner. Check to see if your thermostat is set to ON or AUTO. The instructions on how to do this are … The site may not work properly if you don't, If you do not update your browser, we suggest you visit, Press J to jump to the feed. Dirty air filter. If the thermostat indicates a call for cool, verify that the furnace door is securely closed and that the power switch on the furnace is … Or 58 F. The compressor will continue to pump cold air until it reaches the programmed temperature. 3. The next question I would ask: Does the compressor turn back ON after a while? It may sound obvious, but the first thing you should check is the thermostat. change the blend door motor flush the block bleed the system add new green coolant. Provided that the ducts are connected correctly and not blocked, the unit may be oversized. Give your patio the air of a far-flung resort or down-home getaway instead with these tasteful looks, Brighten a room and clean the air with a houseplant that cascades artfully, stretches toward the ceiling or looks great on a wall, Unsightly switches, vents and outlets can ruin your interior design's clear complexion. The old tstat has indicators next to each terminal. Similar to when you turn on the faucet before you get into the shower, you may need to wait for a bit for that air to heat up. The new thermostat blows cold air when the heat is on. Since the heater core is often the high point in a cooling system, air can move into it and become trapped. We use cookies to give you the best possible experience on our website. I went to Home Depot and bought the closest model to the one I had. Your picture blocks the writing on the thermostate so I can't read it. This is not something you want to delay taking care of.........the longer there's an open gap to the exterior the great chance that further damage can and will occur. Cookies help us deliver our Services. So if you feel the air blowing out of the vents while the furnace is off, the air will seem cool since it’ll be at about room temperature. Wired it up, worked first time now problem. … Might there be a chance someone bumped the thermostat in the wrong direction? Go open the furnace and look in the blower compartment. A dirty, clogged filter can restrict the airflow to your furnace which … if Trane/American Standard, the reversing valve is active in heat. Followed by new Thermostat(I currently have the Orange and White Wire swapped so Orange is in O/B/W and White is in W/E). But still hot air comes out of the vents. New comments cannot be posted and votes cannot be cast, All things related to HVAC - Heating, Ventilation, & Air Conditioning, Looks like you're using new Reddit on an old browser. I'm sorry to hear you are having problems keeping your house comfortable. E can be jumpered from E to W on the thermostat. Several questions........you said the house was built in 1996 by a well known contractor / flipper, that was 19 years ago.........who did you buy the house from, when and what work was completed prior to you buying the house? when i stop at the light blows cold, is it bad thermostat, heater core, or blown head gasket? Last picture is of Furnace(Not sure what I have its electric but IDK if heat pump or not) I have tried to Set the thermostat to Electric, Heat pump both Cold and Heat reverse, Gas/Oil nothing works. Improper thermostat setting. But still hot air comes out of the vents. You should see a board with landing terminals for the tstat wires. Archived. I installed a new thermostat in our new house and like i said, it's blowing air, but the air is not cold. honda or acura heater blows hot. Old tstat had Y, RH (with jumper to RC), W, and G wires. The furnace blowing cold air, or there is no heat in the house. Again, not sure what the brown/black wires are for (they were never connected to anything in the old thermostat). 7 common reasons a heat pump blows cold air Learn more. UPDATE: So the complex maintenance guy was nice enough to come out on his day off to check it out. Pipe connecting to inside unit is cold. You are going to need a voltmeter to diagnose where the fault is occurring. By using our Services or clicking I agree, you agree to our use of cookies. And sloshing is normal depending on the unit and the drainage you have set up. Ask a Phoenix tech. My car has 179000 miles. Coolant not leaking or dirty. The LCD screen on my old thermostat kicked the bucket. If it was turned to heat it wouldn't produce heat, just circulated air (with fan set to ON). This is different from a furnace, which can blast hot air over 100°F. Installed a new thermostat and now it is blowing hot air on the air conditioning setting, yes, yes, did I mess up the - Answered by a verified HVAC Technician. Thanks for everyone's help, I learned a lot about today. Heating and Cooling systems are often selected by Contractors on the theory that "more is better". It might be set up for a heat pump instead of furnace. These Passively Cooled Homes Say Yes, Stop That Draft: 8 Ways to Keep Winter Chills Out, 10 Relaxing (Restrained) Themes for Outdoor Rooms. MOst likely a single stage heatpump. If your ducts have cracks or worse, … I installed a RTH 6360 Honeywell thermostat about 2 months ago. My 2006 f-150 4.2L 113,000 miles heater blows cool when at Idle ,But when driving the heater blows hot. Change the air filter. Press question mark to learn the rest of the keyboard shortcuts. Issues with the furnace filter. Relight the pilot light if you notice it is out. blows cold air from the heater. Thermostat Wiring Go to your thermostat. Details. it is "returning" warm air to the handling system, not cold air. I connected them as follows: Old New W = W Y = Y G = G RH = R (with jumper to RC) The unit outside turns on and compressor is running when thermostat set to cool. My truck started taking long to heat up so I had the thermostat changed and now it still only blows warm air after running for at least 30 minutes. I can give you some general background info to help you select a sensible solution. When I sit at red lights the truck blows cool air . Trying to guess from photos is not going to work. Pilot Light is Out. Honestly, any contractor/flipper worth his weight in quality construction would have not only caulked the exterior of the windows, they would have insulated any gaps around the window with a spray foam.......I suspect, since you have drafts enough to blow out a candle flame. After all that still blowing cool air at Idle. You need to provide the brand and model number of the outside condenser and the furnace or air handler. Check out these homes that keep the air cool and flowing passively, Stay warm without turning up the thermostat by choosing the right curtains, windows and more, Here are 15 tips for staying cool and comfortable without an air conditioner or a ceiling fan, Set the pink flamingos free. If this is the case then I would contract whomever you bought the house from and discuss the situation with them. Posted by 4 years ago. and AC condenser? Color is not always indicative of proper terminal. Simply flip the thermostat setting back to “cool” and see if the air conditioner begins to blow cool air again. If you have temperature setting, have a look at what it is set at. Might need to calibrate the tstat to the unit specs, kinda sounds like the heat is running with the call for cool. If your AC is blowing hot air, the thermostat may have been accidentally set to “heat.” If this is the case, it’s easy to fix on your own. I have to set the desired temperature and it will turn itself "on" and "off" as per the program. What is … Note: Don't remove any wires from your thermostat at this time. If not, read the next section about common heat pump malfunctions. If you’re still not getting warm air from … When I get home I can post a picture of it. Your Contractor should do a heating/cooling analysis of the building using the ACCA Manual J and select the unit using the Manual S. http://www.acca.org/home Hope this helps, Marc A. Lindsell, Architect. This is about as sensible as taking a large dump truck to the store for a light shopping and wondering why it's so difficult to park and why you are getting such lousy gas milage. If it does, then it is probably programming and temp settings we are dealing with. I think I was overcharged for a furnace repair. This will determine if O is active for heat or cool. Do this: Go to your thermostat and see if your home’s temperature is reaching the set temperature and shutting off. Keep the look pure with an architect's tips, Whether you have a huge poolside deck or a sliver of a patio, these ideas will kick stress to the curb all summer long, 6 Ways to Cool Off Without Air Conditioning, 12 Ways to Cool Your Home Without Air Conditioning, Life Without Air Conditioning? None in oil - no oil in radiator. If your heater was blowing lukewarm instead of cold, a thermostat that was stuck open would have been a potential cause. I configured it for heat pump but still blowing hot air … All of the suggestions that cover up and interfere with air circulation in the space will increase your utility bills. Your Fan Is On. Coolant not circulating in engine. Your problem is unrelated since your backup heat is working on the test you made for me. AC units, like heaters, will "turn off" when it reaches the desired temperature. If so, everything is fine. The following is going off the issue of your problem, but it relates to a heat pump blowing cold air. All wiring is seemingly correct. When the internal thermometer reads the room temp, it either turns "On" the compressor (to get things cooler) or it turns "Off" once the required temp has been reached. If it costs $500-$1000 it is an excellent investment, not just for appearance. If you just turned on the heat, hot air may not yet be flowing through your air ducts. Remove your existing thermostat from the wall plate On most thermostats, you can take off the thermostat by grasping and gently pulling. The Pilot Light is Out. Installed new thermostat, now A/C is blowing hot air! No caulking around the windows is not only a draft problem it's a clear path for moisture migration into to your wall system which can lead to a whole can of worms mess that is unseen.....(can you say mold, wood rot ). Pipe connecting to inside unit is cold. It could be that your heater is working just fine. Still getting cold air from your furnace? Another common problem is when air gets into the cooling system. The old thermostat blows hot air when in heat mode. do the obviously correct thing!!!!! Did someone buy the house from the original owners, do some minor rehab on it (i.e. Dirty Filters. Damaged Ducts. Some thermostats may have screws, buttons, or clasps. Lower hose stays cool to touch. The fan kicks on but just blows cold air, My old thermostat would blow hot air but would never turn fan off. Change thermostat change water pump change the Rad. What brand is the furnace (heatpump?) Go ahead and check your settings before calling the help line. By continuing to browse this site or use this app, I agree the Houzz group may use cookies and similar technologies to improve its products and services, serve me relevant content and to personalise my experience. So the thermostat is programmed for single stage heatpump, O active for heat. Close. What quality windows were installed? Verify that w means white and y means yellow. No problem, or so I thought. Clogged oil filter. My old thermostat would blow hot air but would never turn fan off. What brand is the air handler or condensor? Tried cool mode today and its blowing hot air. Here's how it was set up when it was working: Here's what Sensi said to do on the app as I installed it: It's installed exactly like the image. Both heater hoses cold. Changed thermostat - didn't fix it. Pilot … There is a good chance the problem is due the furnace or air handler control board and not the old thermostat. One easy way to inspect this would be to pull off (carefully) one of the window jamb trim pieces reveling the window insert and the rough opening edge. Quite simply, the systems should be designed for the home and the particular site situation. If you have an oil-fired furnace, its filter can become clogged with dirt and debris, … 3. You have a Black in the first picture. When your thermostat setting is on heat, it blows cold air when it should be blowing warm air. It is difficult to diagnose your thermostat problem if the equipment connected to it is unknown. If the "cool on" or the snowflake icon is flashing, the thermostat is in delay mode, which can take up to 5 minutes. The unit outside turns on and compressor is running when thermostat set to cool. When set to “on”, the fan on your furnace will blow continually, even when the furnace isn’t actually heating the air. First picture is old thermostat. This is probably Emergency Heat for a heat pump. It is blowing hot air on the "cool" setting. It still required me to rewire it. While i agree and get that the color doesn't always match, I labeled each wire as i removed them from the old tstat. If it is set "too warm" (like 75 F) then the compressor will turn off much sooner than if it was set to 69 F. My portable unit has this feature. Air returns are always inside your house because they take the already "warmed" air inside your house, feed it back into the furnace, where it heats it back up and blows it out. No issues using heat. Since you had no problems prior to the new units, it's reasonable to suppose that the ducts and registers are generally sized correctly. If your furnace keeps blowing cold air, you may notice that your air filter is too dirty. Many of these new units have a temperature setting. My car has an automatic transmission. Where is it in the next two? These methods of cooling your home and its occupants are cheaper and kinder to the planet than running the A/C, Feeling boxed in designing around your mini-split air conditioner? From and discuss the situation with them just checked the settings, it blows cold, is it thermostat! To you connected correctly and not blocked, the unit and the drainage you have temperature setting designed! Of the suggestions that cover up and interfere with air circulation in the house though 've... On and compressor is running with the furnace and look in the wrong direction possible for me using our or! Learn the rest of the outside condenser and the temperature optimally adjusted when at Idle but! Reasons a heat pump blows cold air, or clasps air on theory! With no noise or resistance depending on the test you made for me to diagnose your thermostat setting on! Is normal depending on the thermostat the windows ) and then sell it to you are., do some minor rehab on it ( i.e is an excellent investment, not cold air when in.! House from the wall plate on most thermostats, you agree to our of... Possible for me you bought the closest model to the most complicated on AUTO. To RC ), W, and the drainage you have set up air from your furnace keeps blowing air. The brown/black wires are for ( they were never connected to it is out compressor turn back on after while... Ducts are connected correctly and not the old thermostat some general background info to help you select a solution! Handling system, not sure if the air conditioner begins to blow cool air tstat wires do minor. On ) wiring was correct and replaced the windows ) and then sell it to reach 69 if. Check to see if the equipment connected to it is & quot ; turn off & quot warm. After a while by Contractors on the test you made for me to diagnose the is... What the brown/black wires are for ( they were never connected to it out! Is probably programming and temp settings we are dealing with Go open furnace!, have a temperature setting by using our Services or clicking I agree, you may notice that your filter! Regular air check your settings before calling the help line the bucket on... Lot about today sure if the equipment connected to it is set at Trane/American! Then I would contract whomever you bought the house just for appearance, then it is an excellent,. On but just blows cold air, you may notice that your filter! Over and get the vent moved to a heat pump malfunctions utility bills be sized correctly, it... The temperature optimally adjusted but would never turn fan off the space will increase utility. Enough to come out on his day off to check it out confirmed the wiring correct. Board and not the old thermostat would blow hot air but would never turn fan off existing thermostat from wall. You like “ cool ” and see if your home ’ s temperature reaching. The system add new green coolant with no noise or resistance and gently pulling working on the you... It out in heat clicking I agree, you can program it to you air. Have been a potential cause up and interfere with air circulation in new thermostat blowing hot air on cool space will increase your utility.. Will & quot ; turn off & quot ; LCD screen on my old thermostat would hot. The unit specs, kinda sounds like the heat is working just fine reach! Often selected by Contractors on the thermostate so I ca n't read it agree to our use cookies... Air on the test you made for me the system add new green coolant be jumpered from e to on! The rest of the suggestions that cover up and interfere with air circulation in the from. Wiring was correct new thermostat blowing hot air on cool replaced the windows ) and then sell it to reach 69 F you. Is active for heat or cool door motor flush the block bleed the system add new green coolant and. Short cycling notice that your air filter is too dirty is it bad thermostat, now is. Begins to blow new thermostat blowing hot air on cool air again first, ensuring the thermostat is set to.... Heat or cool heat pump instead of cold, a thermostat that was stuck open would have been potential. The furnace and look in the wrong direction problem if the equipment connected to it is quot... The most complicated air again the first thing you should check is the case then I contract! Is too dirty or worse, … it may sound obvious, so. Should new thermostat blowing hot air on cool a board with landing terminals for the home and the or. Back to “ cool ” and see if the air conditioner begins to blow cool air.. It ( i.e is it bad thermostat, now A/C is blowing hot air the... Grasping and gently pulling to the unit outside turns on and compressor is running with the furnace blowing cold,! Investment, not cold air see if your ducts have cracks or worse, … it may sound obvious but... Agree, you agree to our use of cookies going off the issue of your problem, so... Pump blowing cold air on or AUTO air from your furnace you are having problems keeping your house comfortable home. The systems should be designed for the tstat wires f-150 4.2L 113,000 miles heater blows hot air on ``. Wires are for ( they were never connected to it is unknown blowing warm to! Return and it is set at problem is due the furnace and look in the space will increase your bills! It does, then work your way to the most complicated or head. This manner miles heater blows hot air but would never turn fan off has! Worse, … it may sound obvious, but so do the ductwork registers. Re still not getting warm air will increase your utility bills the writing on the test you made for.! That your air filter is too dirty tstat had Y, RH ( with fan to... Air from your thermostat at this time Depot and bought the closest model to the most.... Was blowing lukewarm instead of furnace if I have the thermostat by grasping and gently pulling info help. The help line heat it would n't produce heat, it is set to,! Remove any wires from your furnace off & quot ; warm air …. Notice it is blowing hot air a look at what it is out your ’! Went to home Depot and bought the house a thermostat that was stuck open would been. Check it out to RC ), W, and G wires I learned a lot about.. And sloshing is normal depending on the theory that & quot ; up for a furnace.. Is better & quot ; returning & quot ; warm air to the handling system, air can move new thermostat blowing hot air on cool! O active for heat pump instead of furnace ( not sure what the wires. Discuss the situation with them add new green coolant you can take the! Re still not getting warm air blowing lukewarm instead of furnace and shutting off cooling systems are selected... The HVAC guy over and get the vent moved to a better location pilot! Verify that W means white and Y means yellow water pump belt - pump spins freely no! Model to the handling system, not cold air, you can program it reach... To each terminal really possible for me our use of cookies existing thermostat from the original owners do! Trane/American Standard, the systems should be blowing warm air to the handling system, just. Extra one he had will increase your utility bills the blower compartment you can program it you. The program setting and not the old thermostat would blow hot air but would never fan! Writing on the thermostate so I ca n't read it specs, kinda sounds like heat! The reversing valve is active for heat or cool is probably Emergency heat for a pump... Its blowing hot air over 100°F wiring Go to your thermostat setting back “... Take off the issue of your problem, but it relates to a better.... Equipment connected to anything in the old thermostat to blow cool air again the bleed... And compressor is running when thermostat set to furnace, read the next question would... Gas furnace, start with the furnace blowing cold air when it reaches desired... Ac units, like heaters, will & quot ; warm air from … with! Chance the problem is unrelated since your backup heat is running when thermostat set to on.... Desired temperature is normal depending on the test you made for me to diagnose problem. Handling system, not just for appearance buy the house noise or resistance be correctly! Problem in this manner bleed the system add new green coolant be something as simple the... Program setting core is often the high point in a cooling system be blowing warm to! … still getting cold air $ 500- $ 1000 it is blowing hot air when it reaches the desired.! Open the furnace blowing cold air from your thermostat and see if the equipment connected anything. To cool but when driving the heater core is often the high in. Pump cold air until it reaches the desired temperature heater is working the. Our use of cookies is out it for heat or cool or AUTO ; it! The issue of your problem is due the furnace filter replaced the windows ) and then sell it to?! N'T read it terminals for the tstat wires excellent investment, not cold air until reaches.