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gelswick · 08-21-2018, 03:16 PM

Second time out in our new to us 2013 Thor Tuscany 42wx. 3 ac units, set at 78 to 81, it is freezing in here and they will not automatically shut off. Help!! I don't have long johns with me...…

Gary, Nancy, Molly the Labradoodle and Miss Kitty the 3 legged Siamese

BFlinn181 · 08-21-2018, 03:22 PM

I'd suggest you use Google to search for a manual for the make and model of thermostat you have in your RV. A common first step would be to remove the fuse that powers the thermostat or turn off House battery disconnect for a minute or more and then restore power to the thermostat. This often resets the thermostat. A manual will give information on settings, turning off one or more A/C units, etc.

gelswick · 08-21-2018, 03:59 PM

RVComfort.ZC

Pop cover off, pull fuse, wait 5 minutes and replace fuse and cover. So far no difference, 2 of the 3 still running.

hivoltage98 · 08-21-2018, 04:47 PM

Open a window! [emoji23]

Seriously, you can go to the breaker panel in your rv and shut the breaker off for one or more of the ac units. I would also suggest to put a picture of your thermostats up so we can help.

gelswick · 08-22-2018, 05:42 AM

At the thermostat I can turn each individual ac on or off, turn fan on or off plus low or hi for each unit. The question is the ac's do not shut off when reaching the set low temp. They keep running unless I physically turn them off no matter how cold it is.

Jim18655 · 08-22-2018, 10:18 AM

Turn the temp setting up higher and see if it turns off. If it does then the stat is out of calibration. If still not shutting off then probably broken. A shorted wire or miss-wired stat could cause it to run non-stop.

**Lt Dan** · 08-22-2018, 11:27 AM

Does your coach have the remote temperature sensors on the wall or ceiling or does it sense the temperature at the thermostat. If they are remote, then the sensors or wiring could be at fault.

gelswick · 08-22-2018, 01:37 PM

It is only 71 here today yet 2 are running, set at 78-81° and they will not shut off automatically. Of course I can manually shut them off. Could not find any sensors anywhere but don't know what I am looking for.

saddlesore · 08-22-2018, 01:53 PM

Set the dials @ 85 or higher(set each a little higher that the others) and see what happens.

gelswick · 08-22-2018, 05:16 PM

set all at 90° and they shut off. Inching one at a time down to see when that unit comes on and goes off.

found 2 "sensors" no third one, that are .5 by 1" more or less held on by 2 screws, removed screws and there are 2 wires in back, very small gage.

sdennislee · 08-22-2018, 09:04 PM

Remote sensors look like this or similar, some are a bit smaller or have a lower profile, typically mounted on the wall, you may have one for each zone.

BFlinn181 · 08-22-2018, 09:37 PM

Use a ziplock bag with hot water and tape it to the wall so the hot water lays on the sensor. See if it kicks the A/C on and what the thermostat temperature reading is. You could also test with ice cubes in a ziplock to test the sensor for furnace operation.

It sure sounds like either your sensors are faulty or perhaps the thermostat isn't programmed for your set up.

Thermostat manual

Service Manual