Question about Dometic Rooftop RV Air Conditioner

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Wasp in AC on rv roof - Dometic Rooftop RV Air Conditioner

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Pull a/c coer witgh drop light befor daylight use wasp spray.

Posted on Aug 16, 2015

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6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Coleman Mach roof top ac

Under the drain pan on each side should be a small plastic drain plug they might be clogged up with debris.

Posted on Jun 19, 2008

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SOURCE: How do I clean out the vents in my RV Dometic roof

Take it off,the plastic inside vents, with soap water and a hose wash it.  Outside condendor and inside evapator, making sure the drain is open and outside shroad removed, brush off fthe loose stuff. wet both units, put liquid dishwashing soap on both. Spray then through , with a hose untill they rince clean.  While up there. Oil the motor if possible.  Keep the drain clear and open,making sure none of the water is getting into the RV.

Posted on May 10, 2009

  • 1 Answer

SOURCE: red liquid dripping from roof of rv. Coming from

Check that the drain pan is completely draining. If the drain is partialy plugged, you may get rusty water from the unit when the water level gets to the support brackets.

Posted on Jul 30, 2009

SOURCE: air is not very cold on a rv roof top ac what

You should have the manual for this unit handy and as far as recharging tools go. You only need a can of R134a *(if the unit is R12 you need to buy upgrade adapters since R12 is no longer sold) Run the unit and put the R134a filler line on the low pressure side of the compressor *(from manual...dont guess as trying to charge the high pressure side is VERY dangerous). Get the charge just into the Green zone on your charger and that is it! Try not to fill too high in the green zone....I know it sounds funny...but AC's usually work better when they have the low end of their optimum fill. R134a doesnt work as well as R12 so be sure you buy the R134a with cooling enhancers. Your local Autozone can guide you to the right filler/product combination.

Good luck and be careful!

Posted on Jun 30, 2010

motor1258
  • 6674 Answers

SOURCE: How to remove the complete roof top ac unit , 1980

Shut off Any AC power (hydro) to it, remove ceiling assy (inside part) and you'll see 4 bolts going up through lower assy, and into base of upper assy (roof unit) . Remove those 4 bolts and any wiring harness connected from lower to upper unit. Lift it off. If your just replacing the upper assy, leave hydro wires hooked up to lower assy , and let it hang, while you clean surface on roof for new install. Re-install 4 bolts and tighten equally until gasket is approx 1/2 thickness it was before tightening. Re-install wiring harness plug in to lower unit etc. If not replacing, but removing entire assy (upper and lower) be sure to Marette and tape hydro wires as well as any 12 volt wires, and tuck away safely. Install a vent on current opening , or whatever you choose.

Posted on Jul 14, 2010

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1 Answer

Why rv ac condensate leaks into rv


Drain holes on underside of unit on roof are probably plugged. Need to get up and look under and use a stick or similar to unplug drain holes. Should have condensation running across roof , if not, the drain holes are plugged. If worse comes to worse, may have to remove cover, only takes a minute, just be sure to shut power off prior.

Jul 14, 2014 | Dometic Rooftop RV Air Conditioner

1 Answer

RV AC is working fine, but the water is leaking from the ceiling Where is the drain tube on the unit, The AC unit is a roof type, Duo Therm serial # 43404934, Part # 3105459


Normally, the condensate will drain out of the unit onto the roof and off the edge to the ground. Remove your cover inside (probably 2 screws) and tighten the 4 bolts you will find inside. If they are tight, go to your RV supply place and get new roof gasket. Remove the AC and insert the new gasket and resecure the AC to your roof.

Thanks for your question @ FixYa.com

Jul 26, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

Coleman RV Roof Type 110v


COLEMAN R.V. PRODUCTS
GO TO rvcomfort.com
Click on RVP (RV PRODUCTS)
Click on type of AC, if you can’t find the information you want there,
then click on contact us on the Green Bar.
You can get Service Support or Email address and Phone numbers.

Jul 25, 2010 | Coleman Heating & Cooling

2 Answers

Bought my rv used after storage for a few years.


Hi, W/D here.

You will need to open the outside unit and then open the shroud that covers the inside coils to check the drain line for pluggage. Water is produced as condensate when the A/C runs, and should drain off before dunking you. I'd use a stiff wire like electrical #12 solid, and thread it down the drain line. If you can access the other end, pass the line UP the drain line. Dirt dobbers just love drain lines and will plug them up whenever they can.

Best regards, --W/D--

Aug 12, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

How do you get in to clean the fan. we have mud dobber nest on the blade


Going to have to remove cover on roof. Will need to remove all Philips screws around near bottom. If you have/had wasps in there, take a real good look before you pull cover of, and try to do it on a cool, cloudy day, or at dusk, just in case there's more there. If you do it early in the morning, watch for slippery roof. Take a can of wasp/hornet blaster with you as it's not unusual to find more nests under that cover. Been there, done that, many times. Good Luck, keep me posted on results.

Jul 28, 2009 | Dometic Rooftop RV Air Conditioner

3 Answers

Duo-therm a/c


We had this issue also and dirt daubers had built a nest on the end of the fan blade

Jul 28, 2008 | Dometic Rooftop RV Air Conditioner

1 Answer

Coleman Mach roof top ac


Under the drain pan on each side should be a small plastic drain plug they might be clogged up with debris.

Jun 07, 2008 | Dometic Rooftop RV Air Conditioner

2 Answers

Seal for roof top ac unit


I just spoke with the mechanic at my RV dealership and he said the sticky side goes on the a/c unit. You only have to turn it on it's side to do this. Just wait 1 hour after re-installing the unit on your RV before turning it on.

Apr 17, 2008 | Dometic Rooftop RV Air Conditioner

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