1992 MB 300 SE A/C Problems
 

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

http://www.abcinfonet.com/300se/0723_001.jpg

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

do a search on the forum. I hope its not the "Evaporator" that seems to have plagued your body style w140 chassis.

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