Question about Dometic Heating & Cooling

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Dometic roof top ac just clicks. Tried new thermostat. Same result.

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  • Dometic Master
  • 1,363 Answers

Bad board relay or no 120 volts present.

Posted on Aug 16, 2015

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 230 Answers

SOURCE: will not shut off

Sounds like a stuck relay on the unit itself. Maybe there is a short in the control wire that comes from the thermostat that activates the fan.

The thermostat probably has one hot wire at all times. The thermostat then chooses which wire to send the voltage down based on your selection. One of those wires is probably for the fan only. Make sure that it is in good condition (no bare, pinched or wires)

Posted on Jun 17, 2008

jmeredith
  • 417 Answers

SOURCE: compressor tries to start but want

hi,
you have to run a contractor grade extension cord(10-12 gauge) from your rv to run those or theyll do that, the lower the gauge the better, best bet is to plug the rv directly into the outlet, if you cant, get the shortest and thickest extension cord you can.

Posted on Aug 21, 2008

  • 68 Answers

SOURCE: ATWOOD MOBILE FURNACE RUNS WHEN IT WANTS/

Check your furnace for power. will be 4 wires. power ground and 2 thermostat wires. Check for power at the time delay relay, if you have power there check for power going in the fan motor, if power in motor wire, motor is bad. If no power in motor wire and power going to circuit board take the 2 thermostat wire apart and wrap the 2 together comimg from the thermostat. Fan will stat in about 30 seconds. If it does you need a control kit in the ac. But sounds to me like you have a furnace problem.

Posted on Mar 19, 2009

SOURCE: compressor

pls check compressor capacitor and compressor termonal connection start the unit check the voltage at the compressor terminal if is ok means copmressor need replcement

Posted on Apr 29, 2009

  • 1 Answer

SOURCE: Older Penguin roof shroud, new style fit?

I just replaced my two 620315.321 shrouds with the newer style without any problems. I went to the Camping World site (and called them) with model no. and they knew what to send me. I also found that they had the best price at $79.00 (member price) with free shipping.

I didnt check your shroud part no.s, but think you will be ok if you do as I did.

If you have any question about installing, you can email me at remeola@comcast.net

Posted on May 05, 2009

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1 Answer

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Depending on what model AC unit and control box is in the upper unit. Call or e-mail dometic and get recommendations first. ( dometicusa.com ) You'll be glad you did. Been there, done that.

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I need to find a cycling thermostat for a Dometic Roof top unit


I ran across the same problem and found the kit to expensive. I gutted the parts added a transformer, contactor and thermostat. Unit worked great and cost about half the price.

Jan 04, 2010 | Dometic Rooftop RV Air Conditioner

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I''ve been working on this thing for three weeks now. It is a Dometic Duo Therm model 57915.531 roof top ac on my rv. It will not run. This is what i have done so far: replaced the thermostat, there is...


check the compressor winding resistance from common to start
start to run
run to common
the two lowest should equil the highest
also check shorted to ground
check the capacitors the go bad a lot

May 16, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

ATWOOD MOBILE FURNACE RUNS WHEN IT WANTS/


Check your furnace for power. will be 4 wires. power ground and 2 thermostat wires. Check for power at the time delay relay, if you have power there check for power going in the fan motor, if power in motor wire, motor is bad. If no power in motor wire and power going to circuit board take the 2 thermostat wire apart and wrap the 2 together comimg from the thermostat. Fan will stat in about 30 seconds. If it does you need a control kit in the ac. But sounds to me like you have a furnace problem.

Jan 14, 2009 | Dometic Heating & Cooling

2 Answers

Dometic air & analog thermostat control kit


Had one doing similar recently, and after a thunder & lightning storm. Nothing worked, but kept blowing 2 amp fuse in thermostat, when anything tried, heat or cool. Pulled plastic control box down from inside upper unit (AC) made sure breaker was off, took of plastic cover and smelled inside, and could smell burnt plastic smell. Replaced, control box, that got fan only working. Tried another thermostat , everything worked as it should. Turns out the lightning, or power surge, or whatever, shorted out the thermostat, and control box at same time.

Aug 03, 2008 | Dometic Rooftop RV Air Conditioner

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