As per title, my heater controls dont fully work, if I turn it on full it blows full but if I reduce the speed setting it only works in certain stages and if I turn it off it is on the equivalent of auto. The unit is obviously faulty as it does click on the various settings (the one's that work that is) so I will need to replace it. How hard of a job is this to do? is it a dash out job?

Car is a MY93 wrx

Cheers

 

are you on about the dials to turn heater/aircon on if so no take the black plate off in front of it and undo the 4 screws

 

yes I am on about the dials. I take it its not the heater matrix then as I have read that that is a dash out job?

 

got the same problem changed the unit still the same might be the relays