I have a problem with the climate control in my 87 240DL. No matter what the temperature is outside, the air blowing is always hot. If I have it at full speed, it seems a bit cooler, but I believe that is because it's moving faster. Does anyone know of what might be causing the temp to be so high? Anything easy to fix this?
Thanks, Jason Williard
If its anything like whats in a 740, then it's very dependant on a good vacuum source. Is there a separate electric vacuum pump somewhere? If that's not running the system sticks on hot, and (on a 740) you can't alter what vent the air comes out of. Another thing to check is the condition of the switch gear on/in the centre console, it's not unknown for it to overheat, and cause bad connections, which can stop the pump working or cause the system to not be able to detect the cabin temp properly.
TTFN, Ken
No, on a 240 the heater valve is cable actuated. The heater valve often leaks internally, or the cable could be out of adjustment. The valve is located just to the right of the gas pedal, behind the plastic panel. Make sure that it is closing properly, and if not adjust the cable so it does, and if it is, replace is.
Oops! Sorry I was in 740 mode again! Your right, the heater valve has a capillary tube to maintain the set temperature, so your also right about about the cable. However if the OP's cable is adjusted correctly, I would suggest changing the valve, as it's internal rubber seal has probably perished, apologies for any confusion.
Ken
Oops! Sorry I was in 740 mode again! Your right, the heater valve has a capillary tube to maintain the set temperature, so your also right about about the cable. However if the OP's cable is adjusted correctly, I would suggest changing the valve, as it's internal rubber seal has probably perished, apologies for any confusion.
Ken
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