My heater fan only works on the highest setting.. can you tell me why? And what can I do to fix it?
Oct 24, 2009 at 1:23 PM
BLUELIGHTNIN6
✓Experienced Mechanic
16,542 POSTS
most common cause for this is a faulty blower motor resistor. replacement of the resistor is required. first test your blower motor relay, if it tests good then suspect faulty resistor.