Question about Dometic Rooftop RV Air Conditioner

1 Answer

I have a 5th whell RV Couger 2006 had 1 AC unit replaced already now two years later it only pumps slightly cooler air but has condinsation streaming off the roof. An hour and a half later the interior is still up at 90F so I assume the AC need charging but I'm told it is a sealed unit so they would need to re-place it with a whole new unit.

Posted by on

  • Mike Solon Sep 02, 2010

    I just got the 5th whell back from the dealer which I had an extended warrenty with and they replaced the entire AC unit stating the AC had a leak and had to be replaced. They also replaced the wiring down to the fuse box and my two awning end caps all under the warenty. Why would the AC unit devlop a leak in just two Summers uses? I leave it plugged into the house and set the thermostat to 80F and let it run, is that over use of the system?

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Dometic Master
  • 6,674 Answers

Yes it is a sealed unit, and there are some refrigeration guys who can solder on valves and recharge, but make sure you get a quote first, as some charge as much as a new unit. That said, I'd be looking at evaporator coils/fins as well as condenser coils and fins for dirt and debris and give them a real good cleaning. I'm going to assume this is a ducted ceiling, so Make sure your getting flow through all those ducts, and check for how cool it is. Does it feel like cooler air coming out the ducts? Rule of thumb is 20 F difference between ambient and discharge should be normal. All that condensation tells me it's trying to cool but you may have a problem elsewhere, like plugged fins, or faulty ducting. If the flow coming out of ceiling ducts is not good and cool, try removing the ceiling assy and see if the discharge side is cool there, and check that the ducts in to the ceiling have no obstructions as well and are properly aligned.Let me know what you find. Make sure return air filter is clean as well and get a flashlight and look way up in the return area, at the fins for dust collected on fins etc. If you remove outside cover on roof, turn off breaker, and you can use a hose to spray down and a nylon brush to clean fins and coils at condenser. Watch for bees, or wasps when you remove that cover on the roof.

Posted on Jul 30, 2010

Testimonial: "Very helpful I did find the filter very dirty but cleaned that and still no cool air but I plan to check the intake area with flash light as suggested"

  • Mike Butler
    Mike Butler Aug 01, 2010

    Don't be afraid to remove the plastic ceiling assy, so that you can feel the temperature of the discharge side as well, and you should also feel where divider is between return air, and discharge side for leaks coming through from discharge to return side. You'll feel cooler air coming across to return side if there is any leaks, tape them with foil tape, or even duct tape if nothing else available. When you expose discharge side by dropping ceiling assy, feel the temperature of the air, and if it feels good and cool, then you know your problem is in the ceiling duct work, or inlets to it, and changing the rooftop assy, wouldn't cure your problem. When you drop the plastic ceiling assy, there will be 4 bolts holding from inside bracket to rooftop, don't remove them.That's what holds them together, and secures rooftop to inside ceiling. You can usually remove all the screws holding inside plastic assy to those brackets, and usually a few holding metal tray with wiring and let it hang by power wire carefully, to test it. There is normally a tin/galvanized short divider mounted to tray that separates return, and discharge. Keep me posted what you find for temperature difference there.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My airconditioner on my 5th wheel comes on, but no fan or cooling happens


take it to an air conditioner repair shop it possibly needs recharged

Jul 17, 2015 | Dometic Rooftop RV Air Conditioner

1 Answer

RV. when furnace is turned on , fan on rooftop AC unit runs continually


i would say its the relay board or communication cabl between stat and board.

Jun 18, 2014 | Dometic Rooftop RV Air Conditioner

1 Answer

We are in a 5th wheel RV. We have a factory installed Carrier a/c in the kitchen. Lately, it shuts off during the night and we have to reset it in the am in order for it to work. It works fine during...


If the outdoor temps are cooler than inside, AC's are not made for this and will not work well if that is the situation, it floods liquid to the compressor which will overload. will it reset within 20 mins of going off? if so the board/stat are suspect, if not the compressors the villain and its tired and cant handle the other than design condition of 95 F outdoor/80F indoor.

Sep 09, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

RV Dometic Duo Therm roof top AC w/heat pump Model #630515.321El Serial #21631212 Yr. 2003. It is the rear unit, front unit working fine. In AC mode it is blowing hot air as if the heat pump is on. Fan...


If the Air comeing out is the same as the temp inside the RV make sure the compressor is running and not just the fans. It could be low on freon. If freon is ok then you would need to ck the wiring to the selector switch for a short. It would be obviouse because there will be melted wires. I am leaning toword low on freon since you have already been inside the wiring/control unit.

Aug 08, 2010 | Dometic Rooftop RV Air Conditioner

2 Answers

T Tair conditioner unit in our camper runs for a


the air filter may be dirty, if thats not it it is the condinser burned up and not pumping freeon

Jun 29, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

I have a 2005 Pilgram 27 foot 5th wheel. My Duo Therm AC unit makes a ticking sound from the ac unit itself when it's not running. Shutting off the Duo Therm analog thermostat does not stop the ticking...


It's obviously on the 12voltDC circuit of the AC unit. Sounds like thermostat, or a relay in control box is faulty or bad connection. If you remove cover on ceiling assy., you should be able to hear it in the control box. There should be a model number on the ceiling assy., get back to me with that number and I can better pinpoint which relay. Also, try moving all thermostat buttons and temperature controls back and forth quickly to see if it may clean off a dirty circuit in thermostat as well. Make sure your AC hydro breaker is off when working with ceiling assy. just to be safe.

Mar 26, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Condinsate Water Leaks Inside Trailer


Where is it dripping from inside the trailer? is a tray under the unit filling up? why does the line drip? where from? is it split? have you put a color dye in condensate to check flow what temp have you got inside your trailer when A/C off?

Jun 08, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Ice maker leaks with or with out power on the far right side


The water valve (or solenoid) that only lets the water through from the water supply line when the ice maker calls for it is leaking you have to replace it.

May 02, 2009 | Thetford Norcold RV Cooler/Freezer

Not finding what you are looking for?
Dometic Rooftop RV Air Conditioner Logo

138 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dometic Heating & Cooling Experts

Bill Long

Level 3 Expert

587 Answers

Donni Steen

Level 3 Expert

659 Answers

mike cooper

Level 3 Expert

884 Answers

Are you a Dometic Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...