same problem i have. if ur climate controls work then u may just have a bad ground somewhere. on mine, the ground on the fan itself is bad. if the fan fails to come on i pop the hood and give the housing a good wack and that turns it on
im thinking the fan is controlled through that dial and not through a board. im not positive though.
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2000 Chevy Blazer ZR2
Performance Mods: Numerous
Suspension Mods: Some, but not enough
Exterior Mods: Just Right
1987 Buick Turbo T Dark Red
Low 11 sec sleeper
.030 4.1 block, PT6262E, & other odds and ends....
My Cardomain