Question about Dometic Rooftop RV Air Conditioner

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We have a 1999 Nomad trailer model #2950, 29'. The air conditioner was working fine and than stopped. The refrigerator was not working but the freezer was. All other electrical are working. Any suggestions?

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  • lbearr Aug 26, 2010

    Problem solved. Blowned circuit breaker.


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Sounds like 2 separate problems here. First on the AC, have you confirmed that your breaker to AC is on? Do you hear any "clicking", or "Humming" at AC when turned on?
As far as fridge goes, how long has it been on? Has it just recently been turned on from being off for a while? Have you checked that lower door is closed and seal good?

Posted on Aug 26, 2010

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This is surely not a electrical issue.All the electrical items are interdependent.

First let us see what could be the problem in air conditioner

1)When the filter gets clogged with dust, the condenser fins on the inside part of the furnace can not "breath" which causes it to freeze up, literally. Be sure to change your filter or Clean it.
2)Check the fuse and circuit breakers. The thermostat is to be adjusted to cool and below room temperature. The condenser power and furnace power switches are to be turned on.
3)There could be a small leak in the system that allows the refrigerant to escape and when enough has leaked out, the low pressure switch is activated to shut the compressor down to make sure that the compressor does not burn itself out. When this happens, you will notice the compressor running for a short time and then shutting off. The system needs to be recharged and then leak tested, repaired, and recharged. Generally, a fitting or a hose has leaked and once it is repaired you AC will work fine again.
4)Can you hear Buzzing noise on the outside uni?if it is buzzing then
1)No power
2)Bad capacitor
if it is not buzzing
1) bad contractor
2) Low freon pressure switch could be bad
3) Thermostat wires problem.

For the fridge issue:
Problems with the defrost timer or defrost thermostat.IF they go bad.the exchanger will ice over and make it ineffective at cooling the fridge.So if it is bad replace it.
some time compressor may also fail.See there is no damage in wire and remove the dirt that clogs near the back grill of the fridge.

If you don't have hands on please don't play with electrical items.Please take it to the nearest service center

Please do rate the solution if the issue is resolved or post a comment for further assistance.

thank you for using fixya have a nice day:-)

Posted on Aug 26, 2010

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