Question about Dometic Rooftop RV Air Conditioner

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Dometic Blizzard 1300 roof top unit blowing fuses

When I turn on the unit it trips the main rcd switch in the caravan and the site we're connected to. Does anyone have any ideas on what I could try looking for. Also - does anyone have the manual for this model? Thanks.

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YES< this is a "direct ground and either the motor or compresso is grounded--(DEAD)!and needs to be replaced.

Posted on Sep 09, 2008

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How do i repair my dometic air con unit on caravan


When you say safety switch do you mean fuse or breaker? If your breaker is popping(110 volt) then if probably is your compressor overloading the system.i would do as advised before and remove shroud(cover on roof) and clean coils or fins with some otc coil cleaner. Ive been in the buisness eight years and only one time have i change a compressor. Most people get a new ac. Sorry for the bad news

Dec 26, 2014 | Dometic Rooftop RV Air Conditioner

1 Answer

Oil leak on caravan roof top dometic unit


the only place for oil to come from is if you have lost refrigerant sometime when compressor goes bad and burns out you lose terminal seals and oil blows out.

Jan 04, 2014 | Dometic Rooftop RV Air Conditioner

1 Answer

Was working fine then just stopped runningm didn't slow down or make any noise just stopped like a fuse blew. Is there a reset button on main unit on roof


Hi, there are no reset buttons on the roof, but find the breaker panel in your RV, and you will find a breaker that is most likely tripped. You will need to reset it by turning it off and back on very firm. It should be about a 20 amp breaker. On the roof , there may also be a disconnect box with either a breaker or fuses also. Check the one inside the RV first, it is there somewhere. If it continues to trip the breaker, we will have to check to see if you have a problem with the compressor, condenser fan motor up top, and blower motor inside to see what is taking place. You may have a dirty coil up top that needs a good washing out as this will cause the unit to have high internal head pressures and will take out the compressor and keep tripping the breakers. Keep me posted on what you find and please don't forget to rate me as I know you will be kind. I will check back in with you on this to see how you are doing. It is 11:00p.m. here, so I will check on you in the a. m. This should solve your problem if you remove the top and make sure the condenser motor is running along with the compressor. Then kill the power again to wash this coil out. Please keep me posted.
Sincerely,
Shastalaker7
A/C, Heating, & Refrigeration Contractor

Aug 29, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

How do find the roof rafters in a pop top.


Hi; Try using a electronic stud finder and switch to metal detection. Or maybe call or google the company that built the popup. Sometimes they can tell You exactly where to make Your cuts...alpharome416

Feb 10, 2010 | Dometic Rooftop RV Air Conditioner

2 Answers

How difficult / expensive is it to install a heat strip in a Dometic roof top AC? The unit I have has a mark on the knob for heat, but I suspect it was never installed.


Fairly easy. The only thing that you must figure out is how many amps the heat strips will draw. Make sure the fuses and the breaker switch can handle them. And be aware your electric bills will shoot up.

Oct 20, 2009 | Dometic Rooftop RV Air Conditioner

5 Answers

Have roof top air conditioner that blows air but soon trips breaker. any suggestions? Henry


check the condensor fan in the rooof unit. It's the fan blowing on the cpil on the roof.. If it failed, the head preasures can becme excessive andwork the compressor hard causing the breaker to trip. Let me know and good luck, Ned_

Sep 13, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Rf top ac on rv keeps blownig the 3 amp fuse


The 3 amp is 12 Volt protection for the control board. If that fuse is blowing instantly, then you have a short in the 12 Volt system somewhere. More than likely it is somewhere between the Thermostat and the control unit. Check to see if you have 12V at the thermostat. If so, then disconnect the red wire from the thermostat and the red wire at the control unit. At the control unit side, use an Ohmmeter to see if you have continuity with ground. If so, that wire is the culprit. If not, reconnect the red wire and continue to the next wire. Do this until you find the wire that is shorted to ground. Of course, the ground wire will not be checked.

Hope this helps,

Jeff

Jun 29, 2009 | Dometic Rooftop RV Air Conditioner

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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