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I don't know how to set digital thermostat. Heat is coming out instead of air. I need to set the cool air.

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Remove the front cover and check your wiring. r-red=power y-yellow=cool w-white=heat g-green=fan.... r-should be hooked up to r-h and a jumper wire-to rc...!

Posted on Sep 05, 2008

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My Honeywell thermostat isnt keeping my house cool even though the temp is set to 69. Currently 90 degrees in here


Its probably not the thermostat. The air conditioner may be stuck on heating mode. If its a reverse cycle, the reversing valve may be jammed so even when the thermostat is calling for cold air, it stays on heat. If the machine is on heating mode, it should be blowing cold air out of the outdoor unit of the air con. If its on cooling mode, the outdoor should be blowing hot air.

Apr 12, 2015 | Honeywell Heat/Cool Thermostat

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My Dometic digital thermostat wont go up past 32 degrees. What could be wrong?


indicates inside sensor defective or not communicating resulting in a/c being locked out.

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FocusPro TH5000 will not cool


Make sure the thermostat is set to "cool" mode. Make sure the thermostat is wired correctly and has fresh batteries in it. Check both the thermostat end and the air handler end of the wires. If All this checks out, the problem is most likely in the air conditioner, not the thermostat.

Mar 29, 2014 | Honeywell TH5220D1003 FocusPRO 5000...

1 Answer

Heat Pump - blows heat to set temp, then off, then kicks on to blow cold


Heat pumps defrost which is the AC mode, if the heat strip isnt working during a defrost, the air will be cold, A heat pump only feels warm if the heat strips are on too! the refrigeration cycles heat output is much less sensible to our 98F skin. heat pumps that satisfy a room setpoint are working at least, all heat pumps feel drafty to most.

Oct 28, 2012 | Honeywell Programmable Thermostat Heater

1 Answer

What happen when your hvac blows cold air and the heat is set at 73


Sounds like you have a thermostat problem. If your thermostat is not triggering the furnace to ON/HEAT you will not the heat you desire. IF you know how to trigger the furnace you could jump your furnace controller wires BUT DON'T do this. Instead, get another thermostat and try it. But be sure to get the same rated thermostat... take it with you when looking for a replacement.
Not sure about everything going on with your unit based upon what you provided but your thermostat should show the current temp and the temp you set. It also show the mode that the thermostat is in (HEAT / COOL / AUTO) Manually select heat, then increase temp above the current temp setting. listen for furnace to activate or wait a few minutes for warm air output. If not, you'll have to see assistance trom a local heating and cooling company.

Mar 09, 2011 | Goodman Heating & Cooling

1 Answer

Can somebody help,why is my Central AC blows


Most heat pumps have an auxillary heat. Many are electric auxillary heat with a heat strip in the air handler. A common malfunction is for the electric auxillary heat to operate when the heat pump is set on cool. To confirm this, locate the conductor that runs from the heat sequencer to the connection on the heat strip. You will see this on the top section of the air handler. Use the clamp on part of the amp meter over that wire. If the thermostat is set on cool and the heat strip is drawing amps, it means the heat is coming on while the heat pump is set on cool. There is usually one or two causes for this, either the sequencer is bad or there is low voltage wires usually behind the thermostat or in the air handler closet that are touching that shouldn't be touching.

If this is not the case, if its not a problem of where the heat is coming on with the air conditioner, it could be a case of the reversing valve malfunctioning. The way a heat pump works is it reverses the flow of the refridgerant. For instance, many heat pumps the reversing valve is activated in cool. That would mean that there is a low voltage circuit that activates the reversing valve when the heat pump is in cool. I'm not sure what model/brand your heat pump is, Goodman and Janitrol for instance, the heat pump reversing valve is activated in cool. In any case, if the reversing valve is not operating properly, when the air conditioning is set to cool it will actually be heating. Or you could set it to heat and it may actually be cooling instead of heating. Please check these two items first and if you have any further questions, please let me know. Especially if you know of any additional problems like the evaporater is icing up or if the air handler fan is not operating when it should.

Aug 31, 2009 | Heating & Cooling

2 Answers

My air handler comes on ,not the outside unit when my thermostat is in the off position even if i turn the thermostat down to 50 and have it turned off the air handler comes on for about 5 to 10 minutes...


If you have a standard thermostat the fan switch is for the air handler only. It completely over rides the thermostat for most settings. Now lets see this is what I'd expect:
fan switch on Indoor fan runs all time
Fan switch auto Indoor fan only runs when thermostat is set to cool or heat and the thermostat is turned up above room temp for heat or below room temp for cooling. In both of these modes the furnace blower comes on and stays on til the room temperature is satisfied. The outdoor unit only comes on for AC the out door unit will not come on for heat or the "on" setting on the thermostat. See exception 1 & 2 below...

Exception 1- (in a heat pump the out door unit runs in both heat and cool mode unless it has emergency heat turned on then it will not come on outside in the heat mode, and depending on the type of heat pump and furnace or air handler it is). A heat pump thermostat usually has "backup heat" and an "emergency heat" setting switch on the thermostat.
Exception 2 - On some thermostats they are made to cycle on the heat if the temperature reaches a preset temp (around 50'f usually but definitely by 40'f). This mode prevents freezing when if instance the homeowner is away or while the home is under construction. In this mode the fan inside can run but the heat usually comes on with it.
Exception3 - On some electric furnaces the heating strips may be individually controlled and thus not all come on at one time. This may give the feel of no heat especially if the room is cold.

Now there may be other exceptions but Ive tried to give you a heads up on some of the most common ones.
If you need more help please post more specifics about your unit/system as to for sure what switches are set to what setting and what is happening with each. My first though was that maybe your system is OK and you needed to know if the thermostat was working properly.

If this helpd you understand your problem would you please give me as hifgh a mark as you can. Thnaks for using fixya and good luck.

Mar 28, 2009 | Carrier Heating & Cooling

3 Answers

Honeywell thermostat....Home cooling/heating system....Chromotherm III


On heat pumps, the normal setting is simply an air conditioner working in reverse. The EMT or AUX heat is a supplemental heating system using electric heating elements instead of the hermetic (compressor) system. As far as why the regular heat does not work it can be one of many things. low freon charge. reversing valve not functioning. The defrost cycle not working. Take your pick. you may want to call a service man to repair it as the electric (EMT) is not as efficient.

Oct 26, 2007 | Honeywell Programmable Thermostat Heater

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