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Thermostat problem??

by BJ
(Alabama)

I am working on a heat pump. The inside does not come on when I put the thermostat to auto, but will if I put it in the on position. Now the inside comes on but the condenser outside does not come on unless I press the contact switch.. What could the problem be

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Thermostat problem??

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Apr 10, 2012
Rating
starstarstarstarstar 		Hvac tech NEW
by: DEEN ryan

Change the thermostat , it bad
Jun 25, 2011
Rating
starstarstarstarstar 		Need more info to be sure
by: bigtom25

You probably already have gotten this taken care of as I see the other person commented in March and it is now june. So I will stop confusing you by posting anymore of my guesses.

Having as much info as possible about the situation is very helpful. Knowing if the unit is older or newer, or if the thermostat is new, if it's a digital, how the other one was wired, Ect.. Helps!!
Jun 25, 2011
Rating
starstarstarstarstar 		Check your Tstat settings
by: bigtom25

Depending on the type of thermostat you have there are settings that only the original installer would have access to. If you are the installer or have the installers book then you will be able to change the settings of the thermostat.

I mean if it's a digital thermostat which can be used for multiple types of units then you will have special settings in the thermostat for different types of units. Also like the other person said on here to make sure it is wired correctly.

The only thing is if it is a Heat pump you don't need a white unless you have accessory heat strips or 2 stage heating. Your white will be or will say W or O/B. The O is reversing valve in Cooling or B is reversing valve in Heat.

Just depends on what brand of unit it is to determine how the reversing valve is energized. It sounds like to me your internal setting is set for convential heat and not heat pump.

SO your condenser is coming on for cooling but your air handler is waiting for your the indoor sensor to heat up to turn on your fan. Does it do the same thing if you put it into heat?

Actually I think I am going to need more info from you to be more accurate with an answer. Is the unit new? Or is it a new thermostat? Is the thermostat compatible for a heat pump? Or is it a straight cool stat with convential heating?

Is the thermostat for accessory heat? I am going to re-read your posting. I hope I am not confusing you with all this!!
Mar 20, 2011
Rating
starstarstarstarstar 		switched
by: Anonymous

try disconecting contol voltage(thermostat)wiring.start over and read manufactures instuctions closly.sounds like wires are not in correct sequence...red power green fan,yellow cooling,white for heating you should have a conection for the reversing valve also,x or o,i think...hope this helps

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