I have an 95 850 GLT. The heater/defroster has never been right, but now it is just about impossible to get it to blow warm air on the windshield.
The problem seems to be in the multitude of sensors/blowers/fans, etc that make up the system. Any one have any experience troubleshooting it? The diag codes from the computer are no help.
European thinking is that when you want to demist the windscreen the a/c is used to dry the air - i believe that's the way its designed and it is effective.
just crank up the heater controls and let it blow whatever it wants on the windscreen - it is annoying but it works for me.
