Question about Dometic Rooftop RV Air Conditioner

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2007 Monaco with 2 rooftop dometic model 630035-331 units. Turn on front unit, fan starts immediately but compessor does not. Rear unit works fine but doesn't start for approximately 2 minutes after turning on which is normal . This same unit had a start cap switch replaced 2 years ago when it failed in same manner. Could this be saame problem again?

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  • Dometic Master
  • 5,743 Answers

Yes possible motor failure also

Posted on Sep 15, 2017

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Posted on Jan 02, 2017

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22yooper
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SOURCE: Compressor starts and doesn't stop

Relay for the compressor may be stuck ( Contacts welded) both the fan and the compressor should operate at the same time. Have the relay(s) checked and possibly replaced.

Posted on May 31, 2008

jbjaxiis
  • 95 Answers

SOURCE: Dometic Rooftop RV Air Conditioner

Possible bad capasitor, or seized motor

Posted on Jun 25, 2008

  • 68 Answers

SOURCE: btu for dometic 59516.531

59516 is a Brisk Air 15000 BTU.
Thanks for using Fixya
Jerry

Posted on Mar 30, 2009

  • 587 Answers

SOURCE: We have a Coleman 7300 rooftop ac unit. When the

The fan motor is getting hot and going off on the internal overload in the motor.
This is caused by either a low voltage, a bad capacitor, or tight or dry bearings in the motor.
To check the bearings turn the power off to the unit, then spin the fan blade if it spins freely then the bearings are ok.
To check the capacitor you will need some kind of
tester or you can buy a capacitor and replace it, that's what a lot of people do. They usually don't cost very much.
To check the voltage you will need a voltmeter and measure the volts at the unit.

Posted on Jun 09, 2009

  • 59 Answers

SOURCE: How to identify the btu of rooftop AC unit

ANY # DIVISABLE BY 12. MODEL HAS  12-24-30-36-40-48-54-60 12 1 TON 24 2 TON 30 2 1/2 36  3 TON 36.00 BTU 40 3 1/2 48 4 TON 48.00 BTU 54  4 1/2 60 5 TON   60.000 BTU

Posted on Apr 21, 2010

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i would say its the relay board or communication cabl between stat and board.

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If the Air comeing out is the same as the temp inside the RV make sure the compressor is running and not just the fans. It could be low on freon. If freon is ok then you would need to ck the wiring to the selector switch for a short. It would be obviouse because there will be melted wires. I am leaning toword low on freon since you have already been inside the wiring/control unit.

Aug 08, 2010 | Dometic Rooftop RV Air Conditioner

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13.5 Dometic rooftop rv ac design has changed since I purchased 2006 Monaco Camelot rv. The collection cups leading to the drain line do not fit well on the roof seal and a good seal is hard to achieve. If...


I've not run into the problem your having yet, so I will apologize up front for asking you to furnish more information. These drain cups that I assume are little round pieces attached to the base of the unit where it meets the roof, were not common on dometic, but were common on Coleman AC units. Those are the outlets for condensation to the roof anyway, are they not?
Also, as far as gasket goes, no I wouldn't recommend using 2. We were always advised by manufacturer to compress gasket to half the original thickness when installing either Dometic, or Coleman (RV Products). Coleman at one time, had tabs under gasket that when gasket was compressed, and they touched the roof surface inside, that was far enough, which was approximately half the original thickness. Believe it or not, over-tightening is more likely to cause a leak. Stick with half original thickness, or close to it.

Jun 26, 2010 | Dometic Rooftop RV Air Conditioner

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I have my dometic Rooftop ac unit. The heatstrip/fan run perfectly but when I turn on the ac...the fan runs good but when the compressor kicks on it just hums.


The compressor coming on does make a slight "humming" sound which is normal. Is the unit cooling properly? Do you think it is louder than before?

May 09, 2010 | Dometic Rooftop RV Air Conditioner

2 Answers

AC compressor will not engage


It could be the capacitor, it could be a loose wire connection, it could be a delay switch or a contactor/relay.

Mar 30, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

A/C starts, goes immediately to heat


Unfortunately, your rear unit is calling for heat. If you put the rear unit on heat pump mode, does it then cool?
moz-screenshot-2.jpgmoz-screenshot-3.jpgThe reversing valve is energized in the cool mode of these AC's. So there is no real way to bypass it. I would check the thermostat and the control board in the unit to make sure that the switches are set correctly.

In the service manual section of the dometic/Rooftop RV Air Conditioner section. I have posted service manuals for the Heat Pump and the Comfort Control.

Hope this helps,

Jeff

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moz-screenshot.jpgmoz-screenshot-1.jpg

Jul 06, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Comfort control center not working properly


You need to check the cable that connects the Comfort Control to the upper unit. This cable has four wires and should have continuity through all wires. If there is a break in one of the wires or a short, it will cause the CCC to fail and report an error. If all this is fine, then you have a bad control unit in the main unit. Try unplugging the rear unit from the control board and then resetting the Tstat, if this works, then there is a communication problem between the front AC control board and the rear AC control board or the rear control board is bad. Check the cable between the front and rear AC for OK. If it is alright, then you have a bad control unit in the front unit.

Another quick check is to remove the inner shroud from the front unit pull down the control box. Remove the access cover and view the dip switch panel located inside. It should be labeled Zone 1 Zone 2 etc...try turning off Zone 2 and furnace and resetting the tstat. If this works then turn zone 2 on and reset the tstat. If this is ok, then turn the furnace on and reset again. If this works, then all should be ok. If one of these fails, then you can pinpoint the problem there and move forward.

Hope this helps,

Jeff

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Jul 04, 2009 | Dometic Rooftop RV Air Conditioner

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