No air from the AC vents - PeachParts Mercedes-Benz Forum

gozapper · #1 07-10-2011, 12:44 PM

The compressor is working and the fan is running, but very little air is coming from the vents.
Does the mono valve have any effect here?

Thanks,

Tom

spdrun · #2 07-10-2011, 01:21 PM

No -- that only controls water flow to the heating coils. You probably have a bad linkage (if manual climate control) or vacuum pod (automatic climate control). What type of car is this, BTW?

engatwork · #3 07-10-2011, 01:36 PM

What is the car Tom?

sixto · #4 07-10-2011, 01:49 PM

He has posted in the past about an 81 SD.

Sixto
87 300D

gozapper · #5 07-10-2011, 06:08 PM

Oh WOW! My bad!

81 300SD

Tom

Yak · #6 07-10-2011, 07:22 PM

Does/did heat work okay as far as air flow? Do the A/C lines get hot and cold, respectively? By fan, do you mean aux fan, or blower fan?

If the blower is blowing and you get poor flow at the vents, then it's probably a flap problem. Maybe vacuum, maybe control unit.

If you mean aux fan running (in front of the radiator) but haven't checked the blower, then look at fuses; or check the defrost setting and see what happens. Does that get airflow?