I have a 1997 Impreza sport with a regular heater- No aircon fitted. The fan doesnt work on the first 3 speeds- only speed 4.

The relay clicks positively under the dash in all speeds as it should, but the fan only fires up in speed 4.

I thinl I need the to replace the resistor that restricts fan speeds to achieve 1,2,and 3 but dont know where it is??
Any ideas folks??

Any help would be much appreciated

 

99.9% possibly correct on saying the resistor is the problem
Normally located in the heater box/unit itself and in the air flow,or could be electronic switching,never really looked just possibles like other systems use,easily diag'ed just measure the voltage at the fan plug while varying the speeds.

 

Cheers.. will give this a try. Changed the box with the fan (blower) and it made no difference. Guess the resistor is somewhere else.

 

ONLY GONE AND BLIMMIN' FIXED IT!!

well pleased- dead easy when you know how

If anyone else suffers this problem drop me a line- no probs. Will fill you in on it.