heater fan

2002 HONDA CIVIC
133,000 MILES • 4 CYL • MANUAL
Avatar
PEARLJAM
  • MEMBER
  • 3 POSTS
2002, Honda Civic SI: heater fan stops working episodically with no pattern. It's not a fuse, or the blower motor or the switch control panel, the latter having been replaced and the motor tested (they were going to put in a newe one but testing found it worked). I've taken out the relay and put it back in, but not replaced it. The fan works, then stops, then works again. Any diagnostic ideas that I can pass on to the techs at Honda who appear to be stumped? All speeds work or none work.
Thanks,
David
Feb 28, 2011 at 10:45 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
F4I_GUY
  • CAR REPAIR CONTRIBUTOR
  • 3,302 POSTS
The blower transistor is a very common failing component. For the price that they sell for, I would actually just replace it (it's bound to fail sooner or later) and see if that solves it.
Feb 28, 2011 at 11:25 PM
Advertisement
Avatar
FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
well it should be a simple matter of tracing the lack of power back from the motor to where it starts when it falis to run. also it could still be the motor with a dead spot in the commutator or sticky/worn brushes.
Feb 28, 2011 at 11:27 PM