Help, 190E 1990 2.6 blowing hot air from side and top vents
 

The heater in my car is constantly blowing out hot air from the side and top vents even when i turn on the a/c. the a/c is cool, but the side vents continue to blow out hot air. any suggestions?

thanks for taking your time to help out.

its a 190E 1990 2.6. just had the a/c fixed a few weeks ago, its just the heater is stuck on and wont turn off

See if your monovalve is disconnected, or if you have a blown fuse (inspect fuses very closely!!).

i was going to say monovalve...do a search, this has been written about

Easy way to check monovalve......
 

.... with the car up to temp and running, do a check of the heater hose temp.

Feel the return hose(on pax side) and if it's hot, the monovalve is passing coolant.

Why? Either it's not getting closure power, or the rubber is torn.

Do a search. As has been said, much is written....

Jim

Vacuum controlled heater valve
 

Look for broken or disconnected vacuum lines.


PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1990 Mercedes Benz 190E 2.6
Part: Heater Valve
Note: Vacuum controlled.
R3020-11893 Heater Valve Germany IN STOCK





Have a great day.