Question about Dometic Rooftop RV Air Conditioner

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My jayco is 9 years old. now the a/c blows mostly hot. is it empty ? Can it be recharged.

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Could possibly be a low charge. Make sure all the fans are running. There should be one for the condenser and evaporator. Also see if you can tell whether or not the compressor is running. If the compressor is not running then it could be the capacitor for the compressor. If everything is running then you could get the refrigerant charge checked. I would get an estimate for this then price a new unit to see which is cheaper.

Posted on Jul 04, 2010


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1 Answer

Local arcticpro repair

The blue snowflake is for the AC. The 3 fan icons are for low, medium, and high settings. The icon with the cup with over flowing water means empty the water tank. The cup next to the snow flake is the dehumidifier. The cup next to that means tank is empty and the clock is the timer. If the front part is only blowing out hot or warm air I say you got a broken one unfortunately. The back part blows out hot air which is why there is an exhost hose attachment.
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Air not blowing

You just need a recharge.Go to an auto parts store and get a single can of R12 and the recharge line.Find the fitting on the AC line that the recharge line fits on(there's 2 but only fits 1)and hook the end on the can then on the fitting.THEN screw the puncture screw into the can lid to puncture the top of can,then turn that screw back out to release the Freon into the line and into system.To be sure you get all the Freon out of the can,stick the can in a small bucket of hot water while it's recharging your system.That's an old timers trick I use and it works.Once empty,remove the line from the fitting on the system first,remove the can from the line and save the recharge line.Ya may need it again one day.Engine must be running with AC on full when recharging the system.Stay Cool dude.

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1 Answer

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Most likely needs a recharge. Could also be a clogged line, but pick up a recharge kit from AutoZone and try that first.

May 08, 2012 | 2008 Dodge Nitro

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My Jayco is 9 years old. Now thw a/c blows hot sometimes and cold. More hot. Could it have loss freon. Can it be recharged

It could be freon but if it is it has developed a leak somewhere. Chances are, it just needs a good cleaning. Unless you are in an area where service is unreasonably high, it would be worth having a tech check it out.

Jul 04, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

I have recently had the air charged and it is full now it is blowing out hot air

Was it hot before the recharge?
Was it cold right after the recharge?
....and now it's hot again?
Could be empty again.
Most leaks 60% are at the condenser....This is the item that looks like a rad just in front of the engine cooling rad.
20% are at the evaporator....the item that releases the cold beside the heater in the area under the dash.
20% hoses/lines/seals/electrical are the next leak/problem areas.

Aug 23, 2009 | 2004 Lincoln LS

1 Answer

My ac also blows hot air, any suggestions

how did you empty your refrigerant?if you broke the system open or allowed it to get the slightest bit of air in it, it will need to be ran into a vacuum before you recharge it in order to make it work properly. in a refrigerant system, 9 parts per million moisture content is enough to slug a compr

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2 Answers

1999 Chevy Cavalier A/C blows hot air

More likely the recharge blew a o-ring and you have a leak. When your Cavalier was blowing hot air and a recharge fixed it that means it was low on freon which lets o-rings dry out, go back to the shop and have them leak test it. They use a pressurized dye to find the problem. If it's blowing it's not the cooling fan relay, they may have meant compressor relay but I'd have a leak test done first it's not expensive and easier that chasing unknown possibilities.

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1 Answer

Not blowing cold air, do u recharge this unit?

only after you find a leak. first u have to make sure if the compressor is running at all. condenser side spinning. if compressor is not working it will blow hot air if the condenser is dirty or blocked but then u would get a minute or two of cold air then hot. you have to determine its empty or what else might be the cause before you start dumping in freon.

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1 Answer

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If the car's more than a few years old, it probably just needs something as simple as an AC recharge. This runs around $70 at most reputable shops, or there are kits to do it yourself for less money. It's fairly dangerous stuff to deal with, and usually best left to the professionals.

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