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Old 01-02-2016, 07:10 PM   #1
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38FL Front AC Running in 34* Weather

Hi All,

So I got a text today from someone who just happened to stop by the lake property where we keep our 5er year round. They said my front AC was running. UGH! Hopped in the truck and made the hour long trip and the AC was still running. I could have sworn I turned everything off at the thermostat at the end of the season, but it was set to 86* and was running non-stop at 34* outside. Turned all systems off at the thermostat and kicked the breakers off to be sure, since it will be a while before I am down there again.

Has anyone else experienced this phenomenon? Bad thermostat or worse problem?

Thanks in advance for any ideas.

Don
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Old 01-02-2016, 11:04 PM   #2
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was it on furnace? if yes, and the fan was not set to auto, then the fan will come on with the heater. Even if the forward T-stat has no heater hooked to it.
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Old 01-03-2016, 05:20 AM   #3
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No, furnace was off and the fan was set to auto. AC compressor was running.
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Old 01-03-2016, 01:13 PM   #4
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Not that it has anything to do with your situation but I was told if set to "auto" the fans may come on to circulate the heat. Certainly the compressor should not be on.

I've only had mine for a few months but I've noticed I had to do a reset of the system once in a while. Sometimes the heat could be set to 60 but it'd be 35 inside...turn the thermostat off and back on then it kicks on.

Surely haven't seen your issue though.


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Old 01-04-2016, 01:04 PM   #5
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Check humidity inside. Condensation could freeze over switch contacts and cause something like this? Was an issue with voltage regulators on older cars.
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Old 01-04-2016, 02:05 PM   #6
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sure it wasn't the heat pump running
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Old 01-04-2016, 02:39 PM   #7
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I have the 3800FL. I had a t-stat go bad on the back ac and it started running by itself. The dealer replaced the t-stat and has not done it again. That was about 8 months ago.
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Old 01-04-2016, 08:29 PM   #8
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[QUOTE=dmdrj5;1069824]Hi All,

So I got a text today from someone who just happened to stop by the lake property where we keep our 5er year round. They said my front AC was running. UGH! Hopped in the truck and made the hour long trip and the AC was still running. I could have sworn I turned everything off at the thermostat at the end of the season, but it was set to 86* and was running non-stop at 34* outside. Turned all systems off at the thermostat and kicked the breakers off to be sure, since it will be a while before I am down there again.

Has anyone else experienced this phenomenon? Bad thermostat or worse problem?

Thanks in advance for any ideas.


Sounds like the thermostat fan setting got changed from auto to fan Low or med or hi I had that happen to mine once also if you accidently change the program sw. you can reset it by holding it in for a couple of sec to errase pg1 or pg2 back to factory.
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Old 01-06-2016, 04:58 PM   #9
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Thanks to everyone for your responses.

I do not have a heat pump. Didn't seem to be any humidity inside, but I would think it would have affected both units.

Hoping it is just a thermostat issue. Will go down and work on it more in depth in the spring.

Thanks again,
Don
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Old 01-07-2016, 08:19 AM   #10
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check your t stst cold can cause a lot of problems with lcd controls
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