Lee,

Only one DTC, 1-3-5. Any thoughts why this allows the ECC to run fan in AUT when the engine is not running but the ignition switch turn to ACC position? The fan still runs fine in manual mode with the engine running.

thanks,

Lee,

Thanks for the prompt reply. Unfortunately I'm new to the Volvo diagnostics world, I don't have a clue where to start with socket B-1 and downloading codes. Any additional guidance would be much appreciated. Are you referring to an OBD procedure? I don't own an OBD device but now may be the ...

My 93 850 ECC works when the car is running except for when the fan switch is placed in the auto position. Fan works fine in manual, but when I turn to auto, the fan stops. Here is the interesting part. When I turn the engine off and turn my ignition on, the ECC works with fan switch in the auto ...

Think I have same problem, can you tell me if you were able to fix? The climate control does not work in auto with car running, the fan works in manual mode fine. When engine is off and ignition on, then the climate control works in auto.

Did you find a problem with the resistor as mentioned above ...

got it, thanks for the prompt reply!

I could not find the pinned link to the free 850 repair manual, only the manuals listed for purchase such as the haynes type. Appreciate if you could provide me additional directions to where the free manual is located on the forum.

thanks!

can someone explain to me how to reset the auto climate control (ACC) for my 850? I recently purchased a used ACC and the recirc (REC) switch doesn't appear to work since the REC light stays on regardless of the position of the rocker switch. Am thinking the used ACC unit needs to be reset ...