Thread: monovalve in relation to a/c on 85 300td
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Old 11-02-2010, 05:45 PM
4thesporty 4thesporty is offline
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Join Date: Sep 2009
Location: Burleson, TX
Posts: 426
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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1985 300SD 322,000
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