Question about Dometic Rooftop RV Air Conditioner

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Condensation the evaporation that comes off the coach is acidic. it stains the side of the coach. is this something that needs to be corrected.

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First clean this up ., and add a drain tube to the bottom of the coach!

Posted on Sep 08, 2008

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PAC CT-90 Air conditioner My CT90 is leaking


When you air condition, you essentially remove heat from the "inside air" and transfer it to the "outside air". from a google search this thing is sort of like a window air conditioner, but the hot air is sent outside via a vent hose, so the unit can be located away from the window. Any time you cool air, it holds less water, so depending on the humidity, there will be condensate formed, the question is, how is it dealt with. In window air conditioners, you see it dripping from the back side when it is running. For your unit, is it unclear how the condensate is being removed; maybe hot air going outside is directed across where the condensate collects and it is assumed it will evaporate and be vented outside as vapor? First, check and see if the unit is still under warrantee, if so, contact them and see how to get it fixed (if you mess with it, it might void the warrantee). If it has expired or the company is out of business, etc, you can try opening it up and see what is going on. The water collects under the evaporator (the fins where cold air comes out). Underneath there should be some kind of tray or something that collects the condensate and directs it somewhere in the unit for it to be gotten rid of. I'm thinking something is cracked, leaking or come loose, letting the water escape and run out. If that is the case, you might be able to use silicone seal or something like it to seal the leak. Hopefully, it is something simple like that.

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Conair mini split heat pump isn't cooling but has cold suction line but warm liquid line and is not freezing up the evaporator. Thinking a sucking reversing valve?? What could cause that? Both evapor


Make sure that your refrigerant charge is good first. Reversing valve has 4 pipes coming off of it. The one alone is discharge and centre of 3 is suction always. The two sides are the reversing pipes. One side should be same temp as discharge and other same temp (+-5F) as suction. If not then you have bypassing refrigerant in valve. Bad.

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1 Answer

Air Cools well but after about an hour, water starts coming into the coach through the discharge air side. Unit does not freeze up but if I shut the unit off, the tray that holds the water drains quickly,...


Your evaporator is probably dirty and is blocking some of the air flow so the air has to move around the coil and starts coming in through the condensate drain holes. That stops the condensation (water) from draining out the holes because the air is pushing it back in.Try having the unit cleaned and that should stop that leaking.

Jun 27, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

Where does my air conditioner drain, is there a pipe or something?


Hello, most window air conditioners evaporate the condensate by the fan picking up the condensate and splashing the condenser, since the condenser is hot it will evaporate the water as soon as in comes in contact with the condenser.

May 24, 2011 | LG LWHD8008 ThruWallWindow Air Conditioner

1 Answer

Does the orifice, which needs to be installed in the inside unit of an a/c for a house, come with the outside condenser? I had an a/c system installed and an orifice was never installed. the original...


The orifice is the metering device inside the evaporator coil and comes installed from the factory in the coil itself. Some condensers do come with orifices taped to the side of the unit, but they only do that to ensure you have the right size orifice. Sometimes you will have a 3 ton evaporator and a 2.5 ton condenser. In this case you want to change the orifice so that it meters the refrigerant correctly. But if you have a 3 ton condenser and a 3 ton coil, which is normal, you don't have to do anything. So to answer your question, your coil already came with a orifice inside and nothing needs to be done unless there are two different sized units as described above. Hope I didn't bore you too much and helped you with your question!

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Make sure the condenser fan and evaporator fan are running. Check your filters. Make sure the coils are not clogged with dirt or dust. Make sure the compressor is running. Get the refrigerant charge checked.

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1 Answer

Water leaking into RV


If water is coming in through the filter grill, then your drain trough is clogged. Go up to, remove cowling, and flush trough drains out. That will take care of water getting inside. I like to use pipe cleaners and poke through drain holes on either side of the trough.

Excess water is also caused by poor air circulation and coils beginning to freeze up. All is well for a while, until the compressor finally turns off, then you turn fan off and water pours from above. So, while up top, also clean the coils of both the evaporator (located above and behind filter opening) as well as condenser. When cleaning evaporator, take care not to spray water into the inside of the coach. You should not need a special cleaning product unless the coils are very nasty, then use a non hazardous cleaner (you will get some on the carpet down below) such as Orange based. Also change your filter every 100 hours of the fan running (regardless of compressor) to minimize air flow restriction.

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Water/condensation is backing up in the bottom of the unit and overflowing into the house.


The drain in the condensate drip pan is clogged. Locate it and clean it out.

Charlie

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remove the lower assembly and tighten the bolts that hold ac down to coach or pull shroud and check to make sure unit is not frezing up due to dirt

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