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Old 11-07-2019, 08:14 AM   #1
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A/C fan always on

Just started last night. I have dual air conditioners on a Dometic digital control. The rear unit fan just started running constantly. It's set to auto, and the compressor isn't running with the fan. If I turn the power off it shuts off, but starts again with power on. Front unit is fine. Any insight would be appreciated.

2018 FR Sierra 5th wheel
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Old 11-07-2019, 10:29 AM   #2
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Do you have the Dometic LCD multizone thermostat?
If so, you may be able to initialize it. Try the procedure below and see if that helps.

Quote:
Turn off the thermostat and press and hold the zone and mode buttons simultaneously. This will reset your thermostat.
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Old 11-07-2019, 06:57 PM   #3
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I tried resetting the thermostat with no luck. Fan still runs continuously, even when the set temperature is higher than indicated. As far as I can tell the indicated temperature is correct.

Edit: interesting development. I set the thermostat lower and let the unit run through a cycle, and it seems to be working properly. I tried that before, but it only worked after the reset.
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Old 11-08-2019, 09:03 AM   #4
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Maybe resetting it did some good. Only time will tell. I hope that solved your problems.
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Old 11-08-2019, 11:09 AM   #5
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I'm hoping it works. So far so good. Thanks for the help!
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