Community Forums

jlmanatee · 08-23-2020, 10:59 AM

My AC runs very well while underway off our generator till I hit a bump. Then the AC unit may shudder to a stop for about 30 seconds and then it starts running again. It may also do this while turning a street corner. In all other cases it works fine. At first I thought maybe it was a loose motor bracket but now I suspect the wall thermostat. Has anybody else run into this situation?

jacwjames · 08-23-2020, 02:08 PM

Communication between the thermostat and AC units is via a communication cable similar to a phone cable (except wire is reversed).
You might try disconnecting at the thermostat and AC units. Sometimes the connection gets corroded, disconnecting and reconnecting cleans up the connections.

jlmanatee · 08-26-2020, 06:15 PM

I’ve been on the road all day and the problem happened 3 times. I’ve come to the conclusion that the problem is with the generator stopping. After reading some other threads I think it’s a low oil level problem. I’ll top it off before heading out tomorrow and see if that cures the issue.

MSHappyCampers · 08-27-2020, 10:49 AM

I doubt that it's the generator stopping. You can just glance at the generator start/stop switch to see if the light is on when the A/C quits. I suspect it's just a loose connection somewhere that's jarring and losing connection. It could very well be the communications wire that Jim mentioned!

tommar · 08-27-2020, 09:34 PM

X2 on it not being the generator. If the generator stopped, it's gonna stay stopped until you restart it. My genny does not have a light on the dash switch. Only on the genny itself. It could not only be a thermostat issue, it could be a bad ground or other 120v issue.

jlmanatee · 08-28-2020, 07:04 AM

You all may be right. Yesterday's drive home was inconclusive. I brought the oil level up to about mid-dipstick before starting out. It only happened once in 250 miles and that was during a slow turn. But I forgot to mention that about 1 out of three times it's happened, the gen had quit and I had to restart. Thanks everyone for your input.

Incidently, I had kept the oil level pretty low in the gen because I had a "gen stopping problem", even while parked, awhile ago and was following some youtuber's advice about the oil level being too high. I fixed that problem by replacing a bad fuel pump. I think the oil-level-too-high idea was bogus to begin with.