Question about Dometic RM2852 Refrigerator

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Dometic tj80ac compressor won't kick in on 12 volt or 240 volt it tries to start but then won't

It use to do this when the battery voltage a got a little low but always worked on 240 volt shore power.

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  • Dometic Master
  • 6,394 Answers

Bad start up capacitor or compressor

Posted on Oct 06, 2017

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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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22yooper
  • 828 Answers

SOURCE: Dometic Caravan Fridge 7271

Your refrigerant may have completely separated in the system. Shut of the gas, disconnect the electrical and remove refrigerator from the coach or if you have sufficient room inside set it on a clean area. This operation is what is called burping the system.
1. From the base roll it onto the door and wait five minutes.
2. roll it onto the top and wait five minutes.
3. Roll it on the back and wait five minutes.
4. Return it to the base and wait five minutes.

Reinstall it or test it on electrical. It should show signs of cooling in about 30 minutes in the freezer compartment if the system is not plugged in the boiler.

Posted on May 26, 2008

jgwhomeequip
  • 1902 Answers

SOURCE: My dometic frig will not work no power. Has 12 volt and 110 volts

Replace the bulb and also check the relay and the sensor in the back of the unit. But first try replacing the bulb

Posted on Feb 13, 2009

motor1258
  • 6674 Answers

SOURCE: cant find the fuse for the refrig. no power

Check connection for 12 volts, at back of fridge behind vent cover .(outside) Make sure 12 volts getting to the lugs where they join. If you have 12 volts to there, unplug fridge at receptacle usually on left side by back of fridge, just to be safe. Remove cover on circuit board and look for a blown (glass type fuse in there.)

Posted on May 09, 2010

motor1258
  • 6674 Answers

SOURCE: dometic s 1621 works on shore power but won't

What exactly happens when switched to propane? Have someone switch to propane while you stand by vent cover outside and listen for sparking when switched. Make sure it's calling for cool, as in maybe leave door open for a few minutes prior to trying. Let me know if you hear any "ticking" sound as if trying to light on propane.

Posted on Nov 13, 2011

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The battery won't stay charged


Hi it is possible that you Alternator is faulty,if you have access to a VoltMeter ,check the battery voltage in the morning before you try to start it you should have around 12.7 volts for a charged battery if not fully charge your battery again and check the voltage with your car running you should have around 14 volts with the engine reving at 1500 revs.ifyou get around 12 volts then your lights are taking more power from the battery than the Alternator can replace.You could also get your local garage to Drop Test your battery to see if any of the Cells are faulty

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Being an Authorized Service Center for a couple air compressor companies I can tell you I have replaced several 240 volt motors because they were run on 208 volts. Not knowing what model you have or what motor is on it, yes your compressor will run on 208 volts but it is very ******* the motor. At startup, all voltages have a dropoff then come back up to their rated voltage. The dropoff is determined by the original voltage and length and guage of lines getting the power from your transformer to the compressor With 208 volts it typically drops to around 190 volts at startup then comes back up to 205 to 208 volts while running. The motor needs the full 240 volts when it restarts and there is already pressure in the tank If the motor's not marked, call the manufacturer and see if it's rated for up to 240 volts or only for 240 volts.

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If the battery voltage is low then it may need replacing.

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Won't start unless I keep a battery tender on it every time I park it kick start doesn't work either. This is in all weather from summer to winter,,it sucks. I did replace the battery within two...


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I HAVE MY RV AC PLUGGED DIRECTLY IN A110 LONG EXTENSION CORD.....COMPRESSOR RUNS COLD 20 SECONDS THEN FAN ONLY 20 SECONDS THE COMPRESSOR BACK ON 20 SECONDS THIS REPEATS IT SELF OVER AND OVER IS THIS A...


Susan, I really couldn't tell how long the extension cord you're using is or the gauge wire of the cord. I suspect it was a type-O. In any event, for an A/C unit the gauge wire of the extension cord should be no smaller than a 12 gauge and should have a grounding plug. The length shouldn't be more 10 to 12' . Any longer and you may have some voltage loss, when the compressor kicks in (surges) to start cooling.

Hope this helped to answer your question.

Apr 19, 2011 | Dometic Rooftop RV Air Conditioner

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PHO24-IB GODDMAN CONTACTOR CLOSES, RUN CAPACITOR HAS CORRECT MFD, OHMED/MEGAOHMED COMPRESSOR...BUT IT STILL DOESN'T START.


I assume that is a 240 volt unit. If you have a volt meter, check for power across the contactor . If it is a 240 volt unit you should get 240volts on both sides of the contactor. If you DO have voltage across the contactor (after it closes) you need to try and get to the compressor where the wires connect to it. There should also be 240 volts at the compressor terminals marked "C" and "R". If you have power at the compressor between C and R and the compressor is still not even trying to start, the compressor windings are open. Here is really what any tech will need to know to really help you:
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The Dometic brand use separate heat elements for the different voltages. The heat elements are located in the back right hand corner (looking from the rear) about 6 inches up from the bottom. You will see 4 wires coming from the box, 2 for each element. They may be marked which is for each voltage, but if not an ohm meter will be needed to see which one is bad.

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