SOURCE: Location of Drain holes on Duo-Therm Model 630035.321
Good place to start is up on the roof. Look way under the unit (hard to see some times) along the bottom, between where the gasket sits on the roof and metal bottom of unit. Should see small round or similar sticking down from unit. There will be a hole in the side of them. Poke around with a wire or something to open them up. If you don't see water/condensation running across your roof from unit when it's operating, (usually in 2 directions, 1 each side of unit) then yup, there plugged.
SOURCE: i have a duo therm brisk air model 57915-001 leak
Could be the drain path is clogged.. Take the cover off & see if you can get it cleaned..
SOURCE: duo therm air
unfortunatly with the new laws u are unable to unless u are a licenced refrigeration/ac technician
SOURCE: I have a Duo-Therm 57915 (13500 BTU) that frosts
Buy a new one. Your repair will cost approx 2/3rd (or more) the price of your new unit. Your old unit has no warranty left while your new unit will have a warranty. :-)
SOURCE: I have a dometic duo therm roof ac unit that is
It is a closed system, (ends are soldered) that said, a heating and cooling guy may be able to install fill valves and re-charge for you, but make sure you get a quote ahead of time. How old is the unit? Not normal for them to need re-charge, and I've seen them work good for 15 years, if maintained properly. Has it been completely cleaned recently?
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