Nissan Repair: 1991stanza, air conditioner compressor, defrosters

Question
why motor stalls when turn on fan for defrosters

Answer
Ron,

If the motor stalls anytime the fan is turned on it would be the idle stepper on the throttle body.  If only when defrost check to see if the air conditioner compressor is locked and that is killing the engine.  Email me back and let me know what you find.