Coleman Mach 8 AC - runs, no cold air

[pconroy]

Yanked the top off, the fans are running. Coils are clean, whole unit is pretty clean.

But I suspect the compressor isn't running. The coils are cool, (ambient temps) and it's not rumbling or shaking as if a compressor was running.

I've got a multimeter and an event to hit tomorrow. So it'd be nice to see if I can get it going.

Anyone have some tips for debugging the possible issue?

Thanks!

[Sundancer330]

Sounds like it could be the capacitor for the compressor is bad. Here is a link to test it.

https://itstillruns.com/test-rv-air-...r-7823972.html

[parallax]

Maybe simple like the thermostat isn’t engaging the compressor. Bad thermostat switch. Broken or disconnected wire at thermostat

[Sundancer330]

Originally Posted by parallax

Maybe simple like the thermostat isn’t engaging the compressor. Bad thermostat switch. Broken or disconnected wire at thermostat

If the fan is running that means the tstat is doing its job, if nothing happened I would start at the tstat

[pconroy]

An update. Ordered a cap since it was a $30 fix and a logical starting place. My wife, bless her heart, watched a dozen Youtube videos and had it replaced by the time I got home.

I'm not sure she even knows what a capacitor does.
There's a YouTube video for everything.

Compressor is running.
We didn't test it for long, I'm a bit concerned that the air wasn't as cold as I recall.

But it was a cool night.
Tomorrow we'll fire it up again and see if we're out of the woods.
Or if a new upper unit is going to be required.

Thank you for all of your help!
Our fingers are crossed it was just the cap!

[parallax]

Originally Posted by Sundancer330

If the fan is running that means the tstat is doing its job, if nothing happened I would start at the tstat

Not nesessarily, My fan runs regardless of compressor running, if the thermostat is set higher than the tempature in the trailer.., as soon as the temp goes above the thermostat setting the compressor kicks on to bring the temp back down. unless mines wired wrong from the factory.