Coleman rooftop a/c
Does anyone have experience with the coleman mach rooftop ac units? I replaced Both units today with brand new ones. The zone 1 front a/c works as it should. The rear zone 2 unit does what the old one...
Forum Discussion
Bamshell wrote:
Finally fixed!! After buying a new control board and 2 thermostats it ended up being a $20 temp sensor for the coil which was actually the very first thing i looked at.. i tested both for continuity and neither had it so i ruled it out because 1 unit was working fine. Turns out i needed to ohm it out. The giod one had 11k ohms and the other was 80k ohms.. i swapped them out and then the unit worked.. in hind sight i see why it would let the heat pump come on and not the a/c. 6 hrs of trouble shooting and it was the very first thing i looked at. Oh well hope this helps someone!
You said in your first post HP function, the compressor would not come ON. Now you say it worked in HP mode but not in COOL mode. Doug
You state TEMP sensor for the coil. Do you mean the FREEZE sensor installed in the evaporator? If so, that part is NOT supplied when replacing a complete upper unit. And yes, that defective part will keep the compressor from running.
