My 1994 Volvo 940, 4 cylinder (not turbo) air conditioner is acting strangely. Normally, I set the air condition fan blowing from the front on dashboard onto the face of driver and passenger.
When I accelerate the car, the fan switched blowing to the floor from the bottom and stop blowing from the front on the dashboard.
All other electrical equipment seems to work. The vacuum advance seems to be working correctly. Can you tell me what is the problem? Thank you.