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Old 10-09-2017, 05:04 PM   #1
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AC runs all the time.

Checked threads for this but didn't see anything. I have a 2013 SRv32 forest river 5th whl toy hauler. We just got back from Tom Sawyer RV park in Memphis, TN. I am convinced something is wrong with my AC because it runs all the time and it cooled down at night there and everybody else AC were cycling and mine just kept running......one speed. I know it could be the thermostat but when we were up in NY in early June we had to use the furnace and it shut off and came back on as a normal furnace would, a service guy a camping world told me it could be the controller on the AC. Is this an easy fix? or where should I start at with this? I don't want to take it to camping world.

Any Ideas are certainly welcome
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Old 10-09-2017, 05:09 PM   #2
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Sounds like you have it set to fixed speed - either high or low. To have it cycle you want it on "Auto".

Choose "Fan" mode, then step through the choices with the +/- selector.
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Old 10-09-2017, 05:13 PM   #3
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Definitely sounds like the fan not in auto. Even when real hot ours still cycles - shuts off and comes right back on when trying to keep up but still cycled.

If fan is in auto may want to post the model of thermostat so someone with same unit may have seen this one.
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Old 10-09-2017, 05:16 PM   #4
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Sounds like you have it set to fixed speed - either high or low. To have it cycle you want it on "Auto".

Choose "Fan" mode, then step through the choices with the +/- selector.
When we set it to auto it shuts off and will stay shut off until we turn it back on.
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Old 10-09-2017, 05:33 PM   #5
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Here is the FR video with the same thermostat ours has, in the video it shows AU.....auto when you cycle through it but ours does not show it. hummmm?

Videos by Forest River RV
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Old 10-09-2017, 05:33 PM   #6
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When we set it to auto it shuts off and will stay shut off until we turn it back on.


And can we assume that is no matter what temp setting you have for the a/c? Still wonít come on even if warmer than the setting?
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Old 10-09-2017, 05:36 PM   #7
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Here is the FR video with the same thermostat ours has, in the video it shows AU.....auto when you cycle through it but ours does not show it. hummmm?

Videos by Forest River RV


That is strange - normally AU / LO / HI when in the fan speed setting.

Will have to see if someone else has this or us seen it.
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Old 10-09-2017, 05:45 PM   #8
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Note there are two auto modes on the thermostat, One for the heat /cool operation and one for the fan. Set heat cool to Cool then go to fan setting and set fan to auto.
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Old 10-09-2017, 06:14 PM   #9
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And can we assume that is no matter what temp setting you have for the a/c? Still wonít come on even if warmer than the setting?
Yes, it still won't come on.
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Old 10-09-2017, 06:16 PM   #10
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Note there are two auto modes on the thermostat, One for the heat /cool operation and one for the fan. Set heat cool to Cool then go to fan setting and set fan to auto.

Ok, will try this, Man its not that confusing in my house..
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Old 10-09-2017, 06:17 PM   #11
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Note there are two auto modes on the thermostat, One for the heat /cool operation and one for the fan. Set heat cool to Cool then go to fan setting and set fan to auto.
We will try this also...thanks.
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Old 10-10-2017, 12:39 PM   #12
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I agree with all those saying the fan is set at a certain speed and needs to be set to "AUTO". It is the fan running all the time not the compressor.
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Old 10-10-2017, 04:15 PM   #13
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I would check it for the amount of refrigerant. If you have a slight leak, the compressor will run more frequently, and if it gets to a certain point, the compressor will run all the time. I think the fan and the compressor are tied together when the thermostat fan switch is set to auto. If there is a leak, it can usually be soldered and more refrigerant can be put into the system with the exception of having a bad condenser.
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Old 10-10-2017, 04:58 PM   #14
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I felt pretty dumb. This is the first RV we have ever owned. We have used it twice and noticed the same thing, that the A/C ran all the time. I assumed it was like how some hotels are, where the fans runs all the time. I decided near the end of the trip to show my wife how it works, and started going thru the different options on the thermostat, and lo and behold, I found the auto. Set the auto when it was set to cool, and it started cycling several times. I keep learning stuff every time we take it out. This forum has certainly helped me out as well.
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Old 10-10-2017, 05:46 PM   #15
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Thanks everyone, I have to wait till this weekend and get the generator out and play with the thermostat, suppose to be in the 80's, right now it is 50 degrees.
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Old 10-10-2017, 05:47 PM   #16
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Good to exercise the generator as well. Let us know how it goes.
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Old 10-10-2017, 05:53 PM   #17
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Good to exercise the generator as well. Let us know how it goes.
Will do.
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Old 10-14-2017, 03:07 PM   #18
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Good to exercise the generator as well. Let us know how it goes.
Well, the Forum saves my butt again. Fired the Generator up and went to the thermostat and fan setting, pushed the plus button on the right and low and behold there it was the auto setting. I really had no Idea this was embedded in this thermostat and about 45 minutes later the AC kicked off and back on.

Can't thank the members here enough, Thanks again...Bob
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Old 11-19-2017, 10:04 PM   #19
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Thanks for this! Iím not sure how our fan ended up on high, and it was driving me nuts that the heat pump wouldnít shut down. Just set the fan to auto, and now I have glorious peace!
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Old 11-19-2017, 11:02 PM   #20
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I had the same problem as the OP. Would a digital thermostat correct this? Woke up freezing when it was set to 78.
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