The heater is always "on" in the ML430 as far as the heat exchanger is concerned; the system works by opening or shutting the heater vent. It appears that your heater vent controller is stuck open.
And yes, that heater does get quite warm when fully open!
DelJ
Quote:
Originally Posted by Georgeous  Hello,
I recently purchased a 2000 ml430 with 80,000 miles on it. It seems to be by and large in good working order except for the heating. I don't know why but it always seems to be on. Even if I turn the fan all the way down if I put my hand over the vent I can still feel a little bit of warmth emanating from it. When I put the fan intensity to 2, the heating is overwhelming. Temperature intensity doesn't seem to have an effect on anything.
What should I check next?
-George |