I recently took the car in to have some AC work done (03 wrx wagon). To make a long story short, the air wouldn't blow cold and the mechanic told me it was a thermistor. He had trouble ordering the part and I ended up getting it back five days later because it was completely useless for me to be inconvenienced without a car if no work was being done at the time. I have had the car back for almost a month and the air miraculously has worked without a hitch or problem for the last 800 miles...until today. Back to my story, completely baffled by this part that I never knew existed (not the thermostat...a thermistor, who knew?) He told me that it would probably run somewhere under $50 for the part (when he found it) and no more than $300 for the entire fix. He told me that it was somewhere buried in the dash and that was the reason for the high cost. Does anyone know how buried in the dash it is and if it is even possible to do it myself. Lately I have also noticed the compressor clutch clicking/hissing every time it engages (it sounds like running through a puddle). Is that normal for an older compressor clutch or am I doomed to have to replace it? Thanks.