Hired someone to replace my current manually programmable thermostat with a wifi programmable thermostat, and after new thermostat installed, compressor on my Ducane AC10B36-B a/c unit stopped working. He uninstalled the wifi thermostat and reinstalled the original, but the compressor still does not work. The heat works and the fan works, just not the a/c. Any suggestions?
Verify that the thermostat is completing the circuit on a call for cooling, check the contactor at the condensing unit, verify the low voltage, the wiring may be crossed somewhere.
this is exactly what was done yesterday evening - there were crossed wires, and reaffixing them correctly resolved the issue - thanks for the suggestion
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SOURCE: PROBLEM WITH DOMETIC RV ROOFTOP AIR conditioner
Check at the compressor terminals between the Red and the terminal for the overload protector to see if you are getting power to the compressor on startup.
SOURCE: Honeywell Thermostat RTH 7500
Assumed all the wiring are correct,
to change from manual switching from heat to cool, press [system] button ( left ) to go into system setting.
then press and hold the [fan] middle button untill option display 120
use up down button to select option 300 ( Manual/Autochangeover) ,
select 0 for manual, 1 for automatic. ( read caution in page 22 of installation manual )
Good luck
SOURCE: new thermostat not starting compressor
With the jumper inplace does the compressor start? What about without? Unless you have more than one transformer you should leavethe jumper.
SOURCE: I am replacing my thermostat
needm to configure the thermostat to run only when the nit is callling. in the insrallation manuel there is instructions on how to do it.
SOURCE: RV air conditioner. Compressor running, fan stops before cool
The fan motor is getting hot and going off on the internal overload in the motor.
This is caused by either a low voltage, a bad capacitor, or tight or dry bearings in the motor.
To check the bearings turn the power off to the unit, then spin the fan blade if it spins freely then the bearings are ok.
To check the capacitor you will need some kind of tester or you can buy a capacitor and replace it, that's what a lot of people do. They usually don't cost very much.
To check the voltage you will need a voltmeter and measure the volts at the unit.
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