Just replaced the evaporator in my 99 V70XC. This model has ECC (Electronic Climate Control). Changing the dial to port the air to the defroster, dash vents, or floor now has no effect. I believe the recirc flap is inoperative as well. (On that point, the arm from the recirc motor to the flap was off when I disassembled everything, I reinstalled it where I thought it should go.)

Is there a procedure for resetting the flaps (like some Chrysler cars have)? Checking the electricals, all inop devices are controlled by the A (big) connector at the back of the climate control unit. Or did the climate control unit fail for whatever reason?

Fan works fine in manual or auto mode. Temp modulation works OK too (nice cold air for a change woohoo!)

Can't code scan and even if I could, it'd be generic, not Volvo specific.

Thx in advance,

Ron

Ron,
After giving my grey cells a short workout, 2 of my vent motors died on my 1995 850. When the motors were replaced, they would not work. The vents had to be moved to the opposite position because the motors were already in that position.
That probably did not make sense. The closed vent was hooked up to the motor which was already turned to the extreme open position. So, when trying to open the vent, the motor stopped because it was at its limit. It took about 2 hours of playing with the vent position to get them syncronized.

Klaus
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Please answer, we need to know if the advice is good or bad. The 164 has a new home, all I am left with are 2 turbos :)

Thanks for the input. I hope not to have to manually move things...I just got done with the dash removal/replacement and I really don't want to right now. But, if all else (free) fails, I can give this a try. I want to put a meter on some of the wires to see if there's a common fault since only the recirc damper seems to even try to work.

Thx again

Ron

A generic code reader will not work for the ECC codes. I suggest you try a dealer and have him run the program to set the vent limits. There is such a thing.

Klaus
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Please answer, we need to know if the advice is good or bad. The 164 has a new home, all I am left with are 2 turbos :)

Problem was that I had two connectors swapped.

For the record, they are the two on the LH side of the heater box, 6/95 and 6/69.

So, lesson learned...the cable lengths allow this and the connectors are the same. Easy mistake to make so be careful when reassembling after an evaporator swap.

Thanks Klaus for the replies.

Ron

Nice catch Ron. Those 2 wires could go to either place. What's it like to have AC that works? :)
You have more guts than I. I always figure I will have too many parts left over when I finish up.

Klaus
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The 164 has a new home, all I am left with are 2 turbos :)