I have a 1996 3.1L and it's having problems with the heat/air blower. When I dial it to blow through the front vents (that face the driver), it will blow through the defrost vents for about 10 minutes and then will (off and on) switch over to the driver vents. There also seems to be quite a load on the engine (I had a new compressor put in about 2 yrs ago, and that's about the same time that this began. Any ideas about what might be causing this?
Thanks Lou