leaking Dometic AC - condensation
Bedroom AC leaked water over night. Found a wet spot on bed cover beneath AC and drops of water were driping from the center of the unit. This has never happened, 5'er is one year old. Ambient temps o...
Forum Discussion
Old-Biscuit wrote:
Under the evap coil is a drip pan with drain holes that allow condensation from evap coil to drain out onto roof and run off.
High humidity causes high condensation to collect......if drip pan drain holes are plugged/blocked the condensation will overflow drip pan and leak inside the RV. Can also get carried over by fan into discharge plenum.
To access evap coil drip pan/drain holes you have to remove roof shroud and then remove sealed cover over evap coil. I even have to slip evap coil out of position to access the drain holes on my drip pan.
The A/C Unit roof opening is sealed with a gasket. 4 hold down bolts are used to secure unit to roof and compress the roof gasket.
Rain and condensate from drip pan overflowing can leak under roof gasket if the hold down bolts are loose.
To access the hold down bolts you have to remove ceiling grill.
Bolts are in the 4 corners.
They should be 'snug'........do not overtighten them. The roof gasket can be distorted if over compressed and can also block the drip pan drain holes.
'Snug'.......well that means finger tighten bolts then just a slight turn with a wrench (it is something like 20 INCH pounds of torque. Notice that is INCH LBS not foot pounds)
Very nice explanation. Let me add that you might first look at your roof and perhaps you will see "trails" where the water has previously run off but are now dry. That type of clue and Old Biscuits diagram should help you along.
I get plenty of bugs and wasp nests under my A/C and need to clean it up annually.
