Check out some similar questions!

hotintexas1 · Apr 21, 2009, 06:09 PM

My a/c unit @ home will not start. I have checked the following: contactor, capacitor, fan motor, power to the bottom of contactor and the wires coming from thermostat. I got a reading of 6.1 on the thermostat wires. Is my thermostat bad or is there another issue? Thanks.

MarkwithaK · Apr 21, 2009, 06:16 PM

First of all, model#? Serial#? Heat pump? When you say you checked the voltage on the stat wires, where did you check them at?

wmproop · Apr 21, 2009, 06:18 PM

6.1 what? If you are talking about 6.1 volts ac ,you are not getting enough power to the contactor,, is the airhandler working when tstat is calling for a/c to work?
Could be your transformer, tstat, or possibly broken stat wire somewhere, check the voltage at the tstat, at the transformer going in and coming out,, where was you checking voltage when you found the 6.1?

hotintexas1 · Apr 22, 2009, 04:08 AM

Originally Posted by wmproop

6.1 what?? if you are talking about 6.1 volts ac ,you are not getting enough power to the contactor,,,,is the airhandler working when tstat is calling for a/c to work?
could be your transformer,,tstat,,or possibly broken stat wire somewhere,,check the voltage at the tstat,,at the transformer going in and coming out,,,,,where was you checking voltage when you found the 6.1?

Yes it was 6.1 volts. I checked it were they connect to the contactor. The air handler does turn on when I switch the thermostat down to a lower temp. thanks for your reply.