Thread: 83 240d a/c ?'s
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Old 08-05-2008, 12:39 PM
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dmorrison dmorrison is offline
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Join Date: Dec 2002
Location: Colleyville, Texas
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Sounds like your hot water control valve in the engine compartment is either disconnected or leaking.
Move the heat control knobs and check the movement of the 2 levers on the valve. Also make sure the levers on the valve are actually moving. If one or both are not moving the valve correctly then you will have heat.
If they are moving correctly then feel the hoses on the engine side of the valve vs. the passenger compartment side. If the passenger side is as hot as the engine side, with the valves off then the valve is leaking.
If the valve is working correctly then there is a possibility that the main flap in the evaporator box is not working correctly and hot outside air is entering the system.
More than likely it is the water valve.

1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car
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