Heater Fan

[GREYHEADGIT]

My heater fan only works on the last speed, i.e. the very 3rd selection, any ideas what it could be and how costly and easy would it be to fix.

[cmr2payne]

I would say take the dash top off and check the connections

[dickkark]

the heater resistor is the most likely suspect as it only works on lower speeds and is by-passed at full speed,hence why you have full speed only.

[paul.deitch]

for me it was the switch. its easy to check it. but cost plenty to replace