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Old 08-24-2016, 08:36 PM   #11
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I am having the same problem with my ac.Posted this here two days ago.I have a control unit on order since I have already replaced the thermostat.I will also insulate behind the thermostat. Dometic customer service said it had to be the thermostat or the control unit.Cost @$85.00:not worth the hassle of taking tt to dealer for warranty,and being without tt for a month.
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Old 08-24-2016, 08:53 PM   #12
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Quote:
Originally Posted by geo m View Post
I am having the same problem with my ac.Posted this here two days ago.I have a control unit on order since I have already replaced the thermostat.I will also insulate behind the thermostat. Dometic customer service said it had to be the thermostat or the control unit.Cost @$85.00:not worth the hassle of taking tt to dealer for warranty,and being without tt for a month.
Thank you for the input. Maybe I'll replace that also. It would cost more in fuel for me to get it to the dealer.
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Old 08-25-2016, 01:30 PM   #13
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There seems to be a rash of units with control board problems lately. I've read a few threads from people having the same issues.
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Old 08-25-2016, 02:36 PM   #14
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No longer a V-lite owner but still follow the site. Have a Keystone Alpine with two Dometic AC's. This past winter in Florida bedroom AC started acting up. Thermostat read 46 when actual temp for the bedroom zone was around 75. Could get compressor to start but would immediately shut down. Went topside and opened AC. The box holding the control board was full of stink bugs. They were walking around on the soldered side of the board and apparently grounding out some of the circuits with their backs against the metal box holding the board. After I cleaned all the stink bugs out AC operation returned to normal.
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Old 08-27-2016, 04:10 PM   #15
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Look here.

http://www.forestriverforums.com/for...?do=file&id=94
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Old 09-04-2016, 01:44 PM   #16
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I have now replaced the thermostat and the control board on my Dometic 13500 btu ac. The ac still not coming back on after it reaches set temp. Thermostat set temp at 72,actual temp 79 or above. What else can I check? Does the freeze wire in the evaporator have anything to do with this? Could it be a capacitor problem? I am at a loss at where to go from here.
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Old 09-05-2016, 12:44 PM   #17
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The only way the freeze coil would have anything to do with it would be if the evaporator was froze up and didn't thaw out by the time the unit called for cooling again.

How do you get it to restart?
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Old 09-05-2016, 01:06 PM   #18
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I turn the thermostat off for about 15 seconds,then back to cool mode.Ac starts right up and begins to cool again.I might have to manually turn the unit on two or three times as the temp rises,after that the ac will cycle on and off as it should.This condition happens usually at night after ac demand temp satisfied for the first time. I am running the ac today with ac cycling as it should. I took the ac cover off this mourning,checked condenser,capacitor,and wiring: everything clean and in place.
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Old 09-06-2016, 11:20 AM   #19
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Have you ever noticed any error messages on the thermostat?

It sounds like an intermittent problem with communications.
Since you've replaced the thermostat and the control board, I suspect the wiring. Maybe a bad crimp in the RJ-11 plugs. Take a good look inside the plugs themselves and see if the wires going into the blades look right.

It may be worth your time to ring out the wires and even reterminate them.
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Old 09-06-2016, 08:48 PM   #20
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I have not had time to change any parts out of mine but my problem is also intermittent. Somedays I wake up and the a/c is on and other days I wake up and it's not on and the temp is 10 degrees over what it is set to.
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