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#1
11-19-2002, 04:41 PM
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124 Heater defaults to no heat or too much heat
The heater in my 91 300D (W124) is acting up. The fan speed seems normal, and the air comes out of the center vents when it should be cooling and out of the floor vents when it should be heating.
The problem is that the air is either unheated or super heated. There is no in between. The system defaults either one way or the other and stays that way until the car is shut off and restarted. Luckily (it is winter) it usually defaults to heat, but the air is so hot that even with an outside temp of 25 F the car becomes too hot after a while. The amount of heat is not correlated with vehicle speed, it is either really hot or just the outside ambient temp. Where should I start looking?
__________________
Ben The MBs: 1976 300D (W115) - 330K and still going (sort of) 1991 300D 2.5 Turbo - Sold at 221K 1983 280SEL - Sold at 206K 1981 300SD - Sold at 232K 
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