Have a 94 850 wagon and the heater/cooler fan motor only works on high. Worked fine on the drive into Chicago, and the car sat for 5 days while I was in Phoenix. When I came back the fan only works on high.

Any ideas?

do the recirc and ac light flash on the climate control panel?

No, nothing flashes, just positions 1, 2 and 3 don't blow out any air, just setting 4 works.

dose any own a 740

might be something with the rotary switch it self. I'm not to sure. Might wanna check over on Volvospeed forms and see if they have any ideas.