Question about Dometic Rooftop RV Air Conditioner

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What would cause a rooftop a/c unit to leak water inside the trailer only when the unit is running?

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Hi,
There is a drain to run the water outside and it is plugged...this units produces water when running as it dehumidifies the air...

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heatman101

Posted on Aug 08, 2010

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3 Answers

My coleman air conditioner 7300 series is leaking water on the inside


Water in an air conditioner is generally condensation building up on the indoor coil. This happens when the temperature of the coil is below the current dew point of the atmosphere. You have possibly two issues going on.

1) the condensation drip line, which carries the water to the outside is blocked or disconnected (most likely blocked with wet dust build up etc) and can typically be cleared by using an air hose to blow the blockage clear.

2) excessive water can be an indicator that you may have a slow leak in the refrigerant system. reduced pressures will lower the temperature of the coil causing it to condense more water, more frequently. While you might enjoy the seeming better performance of the unit, if there is a leak it will eventually reach a point where the water will freeze(cutting off the air flow so no cooling) and eventually stop working altogether. Have a certified technician check your system for leaks. Remember that most rooftop units use R-22 refrigerant, not R-134a automotive refrigerant. The wrong refrigerant in the system can be very damaging to components and seals, and can cause the unit to function improperly.

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I have a broken water pipe under the trailer and don't know where the actual leak is. its a 93 travel supreme 33 RLSS fifth wheel. any schematics out there?


Not much luck getting a schematic unless you contact travel supreme direct, and that may be useless as well. Metal or vinyl underbelly on that unit ? You may have to add water to each first to see which is causing the leak under, then pull down slightly and look with flashlight to see exactly where it starts from.

Dec 27, 2012 | Dometic Rooftop RV Air Conditioner

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Water leaks from the roof unit


This is condensate (which of course is water) that is coming from your unit. This is very normal ... Is it leaking inside or running across the roof and down the side of your unit? If it is going inside, there is a drain in your roof unit that is clogged. You must clear the clog. Remove the cover and inspect the base. Turn the unit off first.

Sep 19, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

When set at coojest setting, water begins to pool on roof of my motor home


It is normal for water to come out of your unit. On some units there is a drain line if you take the top off of the unit you will see the line hooked to the condenser side (cold) of the unit. But most units just let water run out on the roof and run off. Your unit may have settled or if you have applied a sealant on your roof you may have changed the flow of the discharged water. The water is moisture that condenses from the air inside your rv. This should not cause you any problems unless you have a leak in your roof.

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1 Answer

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Remove all covers and look down with them removed and see if the coil drain pan has a stopped up exit where the water drains out and into the rear of the AC unit.

If the unit is off level it could cause a draining problem too.

Jul 10, 2009 | 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?

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Either your 14"x14" a/c gasket is lose on the roof allowing the condensation to flow into your RV or you have a cracked condensation tray under the evaporator. I'm guessing the later

JGRV

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