Car Questions
RepairPal is your advocate for car care advice and guidance

Heater fan

(2005 Chevrolet Malibu Maxx)
in High Point, NC on December 20, 2009
My heater fan stays on after car is shut off, and this is killing my battery. What can be done about this?
Displaying 1 answers & 0 comments
Popular Answer
on December 20, 2009
You need to have the data stream of your Body Control Module Scanned. There is something, obviously, that is not shutting off. I usually use the BCM data stream to find this. The BCM should be aware of what the fan control is doing. I don NOT mean a Parts Store teeny weeny scan which is sometimes a SCAM!. Have a pro tech do this with a good quality OEM capable scanner. They should be able to see if a relay is sticking, the Ignition switch is defective, or the BCM is incorrectly appyling power to something after is has been shut down. I have seen this problem a lot with Corvettes.
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
The fan initially started running intermittently, then totally stopped. Now--NOTHING!! No sound, no smell, no NOTHI...
I haven’t had any issues until now but the heater stopped working. I turn the knob for the fan but nothing is coming on
Didn't find what you were looking for?