We have a brand new coleman mach 8 cub and an rv comfort hc coleman mach 7330g335 thermostat. The AC fan runs on both low and high and responds to the thermostat but the air won't cool. For whatever reason the compressor won't kick on. I've checked the yellow wire and made sure it's got a good connection at both the thermostat and at the control box on the AC itself. It's brand new so we're taking it back for a warranty once we return but we're traveling back through the heatwave in the southwest so I'd like to try to get it working.

Compressor not coming on, I would suspect the freeze control- don't know offhand what value they need, but usually either opening or shorting the leads will bypass with no damage.

Jumping the 2 leads at the Freeze Thermister connection on the control board will start the compressor on a RVP. NOT installing the Freeze Thermister will also NOT allow the compressor to start and run. Did you install the Freeze Thermister? Doug

Any LED lights on the control board? If so flashing or steady?

I didn't install the unit but found the freeze thermistor, it's connected to the control board on the other end is just jammed between the fins on the condenser, I was guessing that's not correct but let me know otherwise. mchero, no lights on the control board I could see from my vantage point. I can try to pull it out completely tomorrow and check. it seemed like the tabs to pull it out didn't want to release and they would break off if I tried to remove it.

i'm tempted to short the leads on the freeze thermistor to see if it works but i don't want to void the warranty or give the impression i am the reason it's not working...

Air Conditioner runs but won't cool | Good Sam Community

dougrainer
Nomad
Jun 24, 2015
mchero wrote:
Any LED lights on the control board? If so flashing or steady?

You have to remove the control board cover to see any LED lights. Doug
dougrainer
Nomad
Jun 24, 2015
adambeck7 wrote:
i'm tempted to short the leads on the freeze thermistor to see if it works but i don't want to void the warranty or give the impression i am the reason it's not working...

The Thermister is installed correctly. Shorting the 2 pins where the Thermister connects will not void your warranty. It takes a few seconds to do that test. just unplug the 2 spades and jump between them. It is NOT 120 volts, it is low voltage dc current. Doug
COboondocker
Explorer
Jun 24, 2015
i'm tempted to short the leads on the freeze thermistor to see if it works but i don't want to void the warranty or give the impression i am the reason it's not working...
COboondocker
Explorer
Jun 24, 2015
I didn't install the unit but found the freeze thermistor, it's connected to the control board on the other end is just jammed between the fins on the condenser, I was guessing that's not correct but let me know otherwise.

mchero, no lights on the control board I could see from my vantage point. I can try to pull it out completely tomorrow and check. it seemed like the tabs to pull it out didn't want to release and they would break off if I tried to remove it.
mchero
Explorer
Jun 24, 2015
Any LED lights on the control board? If so flashing or steady?
dougrainer
Nomad
Jun 24, 2015
Jumping the 2 leads at the Freeze Thermister connection on the control board will start the compressor on a RVP. NOT installing the Freeze Thermister will also NOT allow the compressor to start and run. Did you install the Freeze Thermister? Doug
Chris_Bryant
Explorer II
Jun 24, 2015
Compressor not coming on, I would suspect the freeze control- don't know offhand what value they need, but usually either opening or shorting the leads will bypass with no damage.

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Air Conditioner runs but won't cool

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