Heat Pump Condensation Drain Line ......

Under the second cover (after you remove shroud) where evap coil/heat pump is a drip pan with drain holes.

Sounds like your units have drain tubes that run thru roof.
The drip holes and or tubing is plugged. Just need to clean them out.
Might need to flush out with a nozzle on garden hose stuck into drain tube
Access to drip pan drain holes may require movement of evap coil etc.


My drip pan drains onto roof vs drain tubing.
I had to gently pull evap coil sideways to access the drain holes....which are very small.
I enlarged them will a drill bit.

Hi,

Have the heat pumps dripped onto the roof before? It is normal with most RV's. Especially in the heating mode, the outdoor coil becomes about 30F and will condense a lot of water. In the cooling mode, all air conditioners collect water on the indoor coil, more when it is humid out. Most RV's do not have a drain line to the ground, but you have a higher end RV, so if this is the first time that your A/C started dripping, then you might have a drain line to under the RV. I have a drain line from my refrigerator to under the RV, but the A/C drips onto the roof on my unit.

So if you remove the top cover, and look under it, start looking for a place taht the condensation can collect in, then a 3/4" drain line. You can try pushing water through this with a garden hose, and see what happens, just make sure that it does not start flooding inside.. . .

And NEVER use a garden hose to wash the inside cooling coil. Many gallons of water will end up on the RV floor, as you will exceed the capacity of the indoor coil drain tube.

You can use the garden hose to wash the outside coil of any air conditioner or heat pump. I wash mine about once a year.

Fred.

Thanks for the input .... I'll climb up on the coach roof tomorrow with tools in hand to check it out ....... one level at a time.

One of the problems with drain lines is mold, mildew and Algae, these grow in moist places and of course said drain tube.. Is just that.. Eventually the algae clogs the tube and .. Well you know what happens then.

You will need to do one of many things.. You may be able to ream out or blow out the tube (Water under pressure can push a lot of "Junk" out of the way)

Id then run some bleach through the tube

IF, and only if the drip trays are plastic and you think you can do it without damage a chlorine pellet, or two, or a tablet left in the tray where it can dissolve very very slowly. and help keep it clean may help.. HOWEVER I advise caution in doing this.

Before I climb the ladder to success ...... does anyone know if the fasteners are hex head, phillips or other??? These days there are phillips, square, star head fasteners .... and who knows!!!