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Old 08-16-2014, 09:01 AM   #1
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Join Date: Aug 2014
Location: Salisbury
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AC Thermostat Not Working??

Hi -

We just joined the forum, so thank you for any help you may be able to provide. We have a 2003 Jayco Avatar and this morning our AC thermostat stopped working. We are running off the generator and the fan will come on, but it won't produce any cool air or automatically start.

We've been using the AC getting ready for a trip out west, and it was working fine until this morning.

Any ideas?


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Old 08-16-2014, 09:58 AM   #2
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Location: Kalamazoo
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It could be anything. I would first check to see if the thermostat is actually working. Turning it slowly you should hear a click. Check your wiring connections to it. If your thermostat is working, it could be something with the starting components for your AC compressor. If your fan starts like you said, then you have power to the unit. Also, make sure your voltage is at least 110v-120v. The compressor and starting components are pretty sensitive to low voltage.


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Old 08-16-2014, 10:18 AM   #3
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I would suspect the A/C over the thermostat. A mechanical thermostat (lever to adjust) is just about as simple as a rock and an electronic is not much more complex. and like Camping suggests they are sensitive to low voltage.

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Old 08-18-2014, 06:03 PM   #4
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See if this helps any?


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Old 08-18-2014, 06:30 PM   #5
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If the fan runs but the compressor doesn't, it could also be the capacitor. This would be located outside on the roof. I'm not sure what type would be on an RV air conditioner, but generally they are cylindrical and have two or three wires hooked to them. Usually when they go bad they swell up and/or leak an oily substance.
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ac unit, air conditioner, thermostat

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