fan won,t stop when car is on

when I hit on /off button ,it just goes faster with a/c off or on.mech. said it'c bcm. dealer wants 385.00 , can I use junk yard to fix it and how much would they want about?

If the A/C setting is off and the motor has not reached the conditions listed previously, then A. the relay has burnt and fused "on" Or B. there is a malfunction in the computer. As we approach the coming summer, yu don't want to try anything but professional service - too easy to destroy an engine with over heating. Lot's of good guys on Craigslist - even former dealership-factory trained types. A warphed heat - blown gasket can run into the thousands very fast