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Old 06-09-2023, 06:48 PM   #1
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Was this an anomaly? Thermostat malfunction.

Memorial Day weekend we were on our 3rd night of boondocking on the beach with our generator running and both a/cís on the whole time. Woke up hot at 2 am to discover the front a/c not running at all and the rear a/cís fan running but no compressor. The thermostat was reading 00 degrees and was completely unresponsive to any input. (I donít remember what it had on the readout otherwise)
Waking up like that from a dead sleep I wasnít thinking clearly and I turned the generator off and back on, tripped both a/c breakers off and on which had no effect on the thermostat being ďstuckĒ and unresponsive. I pulled the front cap out and checked the generator breaker (dumb I know), I looked for a fuse to the thermostat so I could try to reset it. I finally came to my senses and turned the salesman switch off for a few seconds, then back on and viola the thermostat is now working correctly and everything works as it should the rest of the night and all the way home on Monday. I included a couple pictures of the thermostat just for brand / type reference.

Iím curious on theories of why this happened.

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Old 06-09-2023, 07:31 PM   #2
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Overworked????
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Old 06-09-2023, 11:04 PM   #3
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Quote:
Originally Posted by Ray,IN View Post
Overworked????

thermostat overworked? Weíve boondocked in much hotter conditions. It was high 70ís at night, 80ís during the day. High humidity of course. Compressors were cycling, not running constantly.
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Old 06-10-2023, 10:50 AM   #4
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More than likely caused by noise by a 12v item. This tstat uses a data line. It took me over a month to track my issue down. Turned out to be a 12v walwart that powered my HDMI to Cat5 conversion system for my main TV. This TV is located near the hallway tstat install. Have been trouble free since replacing the bad walwart.
If this is a one-on event I wouldn't be concerned. If the tstat begins doing strange things I would concentrate on 12v items. Have you added any new items recently? My issue was so bad that the tstat would turn systems randomly on/off, fan no fan. Had a window ac unit in my dining room window for a month.
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Old 06-10-2023, 12:37 PM   #5
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Originally Posted by DancinCampers View Post
More than likely caused by noise by a 12v item. This tstat uses a data line. It took me over a month to track my issue down. Turned out to be a 12v walwart that powered my HDMI to Cat5 conversion system for my main TV. This TV is located near the hallway tstat install. Have been trouble free since replacing the bad walwart.
If this is a one-on event I wouldn't be concerned. If the tstat begins doing strange things I would concentrate on 12v items. Have you added any new items recently? My issue was so bad that the tstat would turn systems randomly on/off, fan no fan. Had a window ac unit in my dining room window for a month.

Ok thanks for that!
What is a walwart?
I will have to think about if anything has changed. But I donít think so and we had been asleep for hours so werenít playing with any 12v tech, other than flipping lights on and off going to the bathroom. They are all LED now but were changed over years ago. Some are LED tubes that replaced fluorescent.
Hopefully it was a one time anomaly. Now I know what to do if it happens again.
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Old 06-10-2023, 12:43 PM   #6
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A walwart is the black ac to dc or ac step down transformers you plug into an outlet.
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Old 06-10-2023, 04:49 PM   #7
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Was this an anomaly? Thermostat malfunction.

Quote:
Originally Posted by DancinCampers View Post
A walwart is the black ac to dc or ac step down transformers you plug into an outlet.

Oh dang. I have several of those plugged in all the time. 2 that run led strip lights and 2 or more phone chargers.

And 2 that add outlets and include USB ports.
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