Hello All,Please help if you can because I am about to light my camper on fire and push it off a cliff I'm so frustrated! My camper came pre-wired for a second AC (direct vent). First AC is a Coleman Mach 15K so I purchased another Mach15 for the master bedroom. After 5 hours of install for me and a little help from my wife I got the job done. Toughest part was getting it up there but we got it. Installed everything exactly as directed. Moment of truth.... fan but no compressor. No matter what setting I chose I cannot get cold air. Fan turns on every time and even the heat strip I bought with it had no problem heating but no cold air. Checked the harness that plugs into the controls and even pulled apart the entire upper unit to look or a lose wire or something obvious. Nothing. Last ditch effort was to try my generators for power since my shore power at home is a standard 20A 110 outlet (though that has no problem running the other AC by itself). Tried the generators (which also run the other no problem) and same result. If this thing is dead and I have to replace the unit I think I'm going to lose my mind. Wasted all day today for nothing!!If you have any suggestions please help. We leave next Friday for a week in SC which pushed me to do this install this week. Thanks in advance!

Did you access the metal cover for the Tstat and make sure the wires on the Tstat did not come loose? WE assume you have roof mounted controls and NOT a wall tstat? Doug

Yes we have ceiling mounted controls. I accessed every panel that I could find including everything on the roof to make sure all wires were secured. I’m not sure specifically where the thermostat wire connects but I will continue to look. What I can say is there is a harness that plugs into the ceiling assembly directly. That harness runs up to the top unit. I disassembled the entire top unit to trace those wires and they all run either through the capacitors or to the fan motors etc. Is there a place on the indoor unit other than that harness connection I should check?

Just pull down the thermostat knob and the selector switch completely exposed and all wires look good. Still absolutely no sound coming from the compressor. I disconnected and reconnected the wires and wiggled them around just to make sure there was nothing non-visible. Super frustrating really hoping it’s not a bad unit as it was a nightmare getting this one installed

Is there any voltage to the compressor?

Super frustrating AC issue | Good Sam Community

Old-Biscuit
Explorer III
Jul 10, 2021
Start/Run Capacitor
dougrainer
Nomad
Jul 10, 2021
Did you access the metal cover for the Tstat and make sure the wires on the Tstat did not come loose? WE assume you have roof mounted controls and NOT a wall tstat? Doug
kfp673
Explorer II
Jul 10, 2021
Yes we have ceiling mounted controls. I accessed every panel that I could find including everything on the roof to make sure all wires were secured. I’m not sure specifically where the thermostat wire connects but I will continue to look. What I can say is there is a harness that plugs into the ceiling assembly directly. That harness runs up to the top unit. I disassembled the entire top unit to trace those wires and they all run either through the capacitors or to the fan motors etc. Is there a place on the indoor unit other than that harness connection I should check?
kfp673
Explorer II
Jul 10, 2021
Just pull down the thermostat knob and the selector switch completely exposed and all wires look good. Still absolutely no sound coming from the compressor. I disconnected and reconnected the wires and wiggled them around just to make sure there was nothing non-visible. Super frustrating really hoping it’s not a bad unit as it was a nightmare getting this one installed
2oldman
Explorer II
Jul 10, 2021
Is there any voltage to the compressor?
3_tons
Explorer III
Jul 10, 2021
I’m not too familiar with the inner-workings, but the t-stat (when in cool mode) should be in communication with a motor start relay, so if possible (I donno…) I’d look for voltage on either side of this relay…JMO

3 tons
kfp673
Explorer II
Jul 10, 2021
2oldman wrote:
Is there any voltage to the compressor?

Meter shows roughly 12v on each of the 3 wires at the compressor while running. If money was no object I’d love to rip this POS off the roof and smash it. So frustrating. Guess I should have paid the dealer to install it so if they hit these issues they can deal with them and replace it
Weldon
Explorer
Jul 10, 2021
Is the original ac working properly>
kfp673
Explorer II
Jul 11, 2021
Weldon wrote:
Is the original ac working properly>
Yes, it works fine. After running into cooling issues with this new one I shut that down and ran the original unit and it had no problem. Unless I am missing something, I have it narrowed down to bad T-stat or bad compressor or some sort of electronics that I can't see. Unlike wall mount T-stat units I don't see a "brain" or anything like it. Guess I need to wait to speak with Airxel Monday to see if they have any magic tricks. Really hope it's the T-stat as that is easy to replace.
3_tons
Explorer III
Jul 11, 2021
kfp673 wrote:
2oldman wrote:
Is there any voltage to the compressor?

Meter shows roughly 12v on each of the 3 wires at the compressor while running. If money was no object I’d love to rip this POS off the roof and smash it. So frustrating. Guess I should have paid the dealer to install it so if they hit these issues they can deal with them and replace it

I’m a little confused here…Did you mean 120v at the compressor??

3 tons