Re: Medium fan speed not working
On the air intake system somewhere around the fan is a plug with three or four contacts. Pull it off and clean it out and stick it back on.
If he's got air conditioning, it'll be on the air conditioning tower just left of the canister.
Since it's not that only high works, then it's not the coils. The way the system works is that on low it goes through all the coils, medium it goes through one less coil, and high it goes through one coil or no coils.
"The difference between a yooper and a lowper is that a yooper oil change involves just changing the filter whereas a lowper oil change involves just changing the oil."