How does the monovalve relate to the a/c function in my 300td?

My a/c blows warm but is properly charged

Feel the heater core "out" hose. If it's warm there's coolant flowing.

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

I had a problem with my monovalve being stuck open, so even though the air was conditioned, it was also heated too.

A new monovalve fixed it.

Think of it this way:

When you are on a highway trip in fall with the ACC set to ~24C, then once the cabin air gets to that temperature and it decreases the fan speed to it's lowest setting but the cabin air temp is still less than 24C the next thing it does is slightly open the monovalve to stabilize the cabin temp.

I love my working ACC!

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----Adam

1985 300SD 322,000

The monovalve does not operate in interim positions.

Ahhhh, I knew that.

Correction: The scoop air flap directs air leaving the evaporator either directly to the vents or through the heat exchanger. This does operate in interim positions

(83-600)

The FSM file is too large to attach here, but PM me your email address and I'll be glad to send it.

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----Adam

1985 300SD 322,000

I just pulled several good ones. If you need one let me know. Maybe 10 bucks shipped or something

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08 R320 CDI current

Past
95 E420
87 300D Turbo 5spd
90 300TE
83 300SD
85 300TD
92 400E
85 190D

ashedd

pm me your details for a used monovalve....I'll take one. It's worth a try for that much $