Have HVAC Questions? Ask an HVAC Expert for Answers
Hello, my name is Wade. If you hold down the contact it works?
Do you mean everything works. I mean it actually starts cooling? Or does the fan just come on?
Well if you replaced all those parts I am baffled
You might have a bad motor in you compressor, but it wouldn't run with manual switching.
I'm sorry I'll opt out
Hello. if the unit runs when you push in the contactor manually, then the problem is entirely that the contactor is not getting 24v to its control coil, or the contactor coil is bad.
If there is no 24v to the coil, then the problem is in the 24v control circuit that runs from inside the furnace or air handler, out to the unit and once arrived at the unit, one of the wires runs through a high pressure cut out switch that could have tripped and needs to be reset.
If you have trouble finding any of that, take a close up photo of the wiring diagram glued inside the units electrical controls box, and attach it here using the paper clip icon at the right end of your tool bar, or the attach files link to the left of your send button, photo must be exceedingly well focused,
We can go from there.