I really like the variable speed on the A/C fan in my car. (It speeds up and slows down according to interior temp).

Does anybody know if it also turns the A/C compressor on and off according to the car's interior temp?

Thank you.

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1991 350SD, Factory Rebuild, Rebuilt transmission, new paint.

The fan speed should be different from the temperature setting...
You are the best one to test this.... have someone look at the front center of your compressor while someone adjusts the dial....

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

I may be wrong, but I am pretty sure the "auto" function of the fan is just that, it automatically controls the fan based on cabin and interior temps but it has nothing to do with the AC compressor. What does control that is the function you have it set to. If set to economy, the compressor will not kick in. However, in all other functions it will - again according to the temperature differences.

So if its 40 degrees outside and you command a temp of 50, the compressor will probably not kick in since it will want to blend heat into the incoming air. But its 70 outside, it will kick it in.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car

the only thing that controls the amount of cooling the compressor produces is the expansion valve and the engine RPM. The CCU sends a call for a/c and energizes the compressor, and unless the air temp drops below 33 or so degrees F, the compressor stays on.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!