Blower Motor Always Runs At One Speed Only

SYMPTOM
BLOWER MOTOR ALWAYS RUNS AT ONE SPEED ONLY

POSSIBLE CAUSES
- Blower motor control CKT short to body ground
- Blower motor control circuit shorted to blower motor ground circuit
- Blower motor controller defective high speed only
- Defective AZC module fan stuck on one speed only
- Defective AZC module PWM signal sent blower high