1992 MB 300 SE A/C Problems


Starts out cool on all vents....
Set on Automatic (Dual System) 75F
after a few miles when engine is at operating temp
driver side dash and foot vent blows HOT AIR ???

HELP



Ralph
have you check the Dual heater valve at driver side behind left side head-lamp unit you may have hot water going to heater core after engine is warm-up or you have vacuum leaks

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