Bamshell
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Re: Coleman rooftop a/c
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!973Views0likes0CommentsRe: Coleman rooftop a/c
Thanks for all of the replies! Im leaning towards it being the tstat and here is why.. zone 2 is the back unit and if i switch to heat pump neither the compressor or the fan comes on. I am plugged into 50 amp ac now btw. If i go to cool, the fan comes on, no compressor. Also i just fired up my LP furnace and zone 1 seems to work perfect. When i try zone 2 on the gas heat it does nothing. I can tell there must be a separate fan for the rear zone because i have vents down low with no air flow coming out.. any feedback is greatly appreciated975Views0likes0CommentsColeman 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 did which is the fan coning on in cool mode but the compressor does not engage. In heat mode (both are heat pumps) front works as it should, rear doesnt even come on at all. Wondering if this is a tstat problem or a control board on the unit. New one doesnt come with this, the old one is used. Thanks for any help3.8KViews0likes14Comments
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