Question about Dometic Rooftop RV Air Conditioner

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A/C NOT COOLING AFTER 10 MINS,, LOW GAS? 2004 DOMETIC

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Sounds unit is freezing up take down the filter and lokk for ice on coils if so possible low gas but just cause it dont cool do not assume it is low on gas

Posted on Aug 01, 2009

Testimonial: "ACTUALLY, FAN HAD BECOME STUCK, HAD TO DISASSEMBLE AND STARTED UP OK BUT NOISY FROM ENCLOSURE BEGING TOO UNBAFFLED."

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Posted on Jan 02, 2017

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Last year my dometic rv fridge would run fine on propane then up and quit cooling, the freezer would warm up and the pilot light was still on. When I turned it off for 1/2 hour it started to cool with no...


Here is an interesting possible problem to look in to

First a bit of background on LP gas

Your LP system operates on 1/2 lb of pressure Not much more than a breath of air. Keep this in mind for a minute.

A lot of RV's have been built over the years using rubber hoses to connect LP gas to water heaters, furnaces, and refers.
Over time rubber and LP gas create an oil, if you have a low spot in your rubber line that oil will collect in the low spot - - Remember the 1/2# of pressure from earlier? Does not take a lot of oil build up to over power the 1/2 # of pressure and now you are not getting LP gas to your refer.
This is one possibility. The lines will need to be removed from the refer and other low setting items like the water heater and furnace also from the LP tank regulator and the using NO MORE THAN 10 pounds of air pressure blown out. BE VERY CAREFUL this oil is some really nasty stuff - cover the ends of the lines with a cloth in a plastic bag with some holes poked in the bag and rubber band it on.

But first lets look at some other options

Your refer has to have 12 volt power to it to operate
90+ % of all 12 volt issues are grounding problems.
Make sure you have at least 12 to 13 volts to the refer and that you have a good ground.

Next Are you getting gas flow to the burner?
If you are getting gas try changing your thermocouple They run a couple of buck and is an easy test.

If you have 12 volt power and gas have you noticed an ammoina smell?

This model has been known to lose the cooling unit
Hope this helps
Coyote

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DOMETIC RM 7651l HAVE POWER AND GAS TO THE FRIDGE BUT WONT START (TWO MONTHS OLD)


Igniting a Dometic gas fridge
    Electronic Ignition
    1. Open gas cylinder or pressure regulating valve
    2. Turn on Electronic ignitor switch
    3. Turn gas control knob to the MAX position, press and hold down
    4. After ignition, hold down knob for a further 15 seconds before releasing. The neon light will stop flashing
    Piezo Ignition
    1. Open gas cylinder or pressure regulating valve
    2. Turn gas control knob to the MAX position, press and hold down
    3. After approximately 10-15 seconds
      press Piezo knob several times until pilot light a lit
    4. After ignition, hold down knob for a further 15 seconds before releasing
  1. Check the Pilot light is alight
  2. The flame can be controlled by aperture ©
    Should no ignition occur, repeat the ignition process after 1 minute
    (This could take longer than 10 seconds if the unit has been out of operation for a prolonged period or after replacing the gas cylinder. (Cause: air in the lines)
  3. Once sufficient refrigeration has been obtained in the cooling tank at the MAX position, the control knob should be turned to the MIN position by low outside temperatures or when the refrigerator is only lightly loaded respectively the ambient temperature is below +18c in order to avoid over freezing the contents.
I hope this helps you...

Regards

Wouter...

Sep 30, 2008 | Refrigerators

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