Quote:
Originally Posted by JHZR2
My 240 D does not loose any coolant. It gets up to temperature perfectly, and has no issues regulating temperature and staying at the right operating temp. AC system works well, AC blows COLD, heat blows hot. I dont seem to be able to get any air out of the two outboard dash vents, but that is another thing for another time.
Car is mechanically perfect. No smells of any type.
When I turn up the heat in the car, I get a pretty good fogging of the windshield. It does this without fail, AC engaged or not. Eventually it goes away, but it happens every time.
What gives? I dont think it is a bad heater core, because I smell no antifreeze and loose no antifreeze.
Could it be AC condensation on the hot heater core flashing up as steam?
My 240 has a fully manual system.
Thanks!
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Following the KISS philosophy, the most likely cause for your fogging windshield is a leaking heater core.
I know you said that it uses no coolant, and there is no odor, but the leak could be tiny.
In my experience with any car, a fogging windshield when using the defroster has always been a leaking heater core.