Question about Dometic Rooftop RV Air Conditioner

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15,000 btu roof mount 2nd ac nonducted cycles about every 5 or so mins ice cold air for about 1 mins

Brand new used very little blows ice cold air when noy cycling

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  • Dometic Master
  • 6,674 Answers

Have you checked location of probe for return air? Remove filters and find probe to make sure it is about in the middle of flow of return air. Let me know what you find.

Posted on Jan 27, 2013

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6ya6ya
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Posted on Jan 02, 2017

  • 127 Answers

SOURCE: fan cutting on and off every 5 mins

The only thing that is going to but the fan off is the thermostat. When the fan stops, immediately check the thermostat on the wall. See is there is power between the B terminal and the GH terminal. If none, then replace the thermostat. If there is, then replace the control board in the AC. That means that the fan relay on the printed circuit board is weak.

Posted on Jul 04, 2009

motor1258
  • 6674 Answers

SOURCE: My air conditioner keeps icing up.

Don't forget to drop ceiling assy enough to be sure that their are no restrictions or blockages on the forced side going into duct work etc, as well. Feel for cool air leaking across in to return air box as well.

Posted on Jul 26, 2010

  • 230 Answers

SOURCE: We just bought a new

Yes if its working properly. A 20 degree temp. differential between its supply air and return air its good.

Posted on Jul 02, 2011

  • 230 Answers

SOURCE: our ac gets cold then cycles off and does not blow

Look from inside you should see a filter and behind it a coil, the filter and the coil should both be clean, (very clean) might be all that's wrong.

Posted on Jul 02, 2011

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Is there any kinds of problems with this air conditioner


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    7_7_2012_10_38_25_pm.jpg7_7_2012_10_39_02_pm.jpg7_7_2012_10_40_14_pm.jpg

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    Fan cutting on and off every 5 mins


    The only thing that is going to but the fan off is the thermostat. When the fan stops, immediately check the thermostat on the wall. See is there is power between the B terminal and the GH terminal. If none, then replace the thermostat. If there is, then replace the control board in the AC. That means that the fan relay on the printed circuit board is weak.

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