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Car flatterns battery over 7-10 day period.No noticeble current drain at battery. (year old battery and alternator.) Gets used often enough so doesn't present a problem. Last night while working in work shop, I hear the heater blower start up on its own. Car has been sitting 36 hours since last use.Fan control switch had no effect with ignition off.Had to turn ignition on in order to stop fan.
Where do I start? Is this a heater controller problem (has climate control).
All heater /fan/Ac functions work normal.
'87 Z51.
Your blower control module is dead and you need a new one. Mine is messed up also and the blower will come on alllll by itself even with the keys outta the car. It is the part on top of the blower that two things of wires plug into. It is something like $88 to replace. I leave my blower unplugged unless I'm going to be needing it until I replace it.