I POSTED THE " NO HEAT 1993 " THE OTHER DAY , FOUND OUT IF I DISCONNET THE PLUG IN AT THE A/C COMPRESSOR I GET BETTER HEAT. NOW MY QUESTION IS WHY DOES THE A/C COMPRESSOR STAY ENGAGED ALL THE TIME , UNLESS UNPLUGGED OF COURSE? IT DOES NOT MATTER WHAT SETTING ON THE TEMP CONTROL I HAVE IT?

 

sounds like the heater control is stuck in defrost and the blend doors are not switching over does it have the electronic control unit ?

 

Yes it does have the electronic control system.

 

A light bulb that won't cut off (unless it is unscrewed) would NOT be hard to diagnose. First thing you would do is pull the switch, and see if it breaks the circuit when switched. A/C is the same, with a few more switches.

Might take a while, but since it is NOT intermittent, all you heed is a multimeter, and wire schematic.