Jim Grant's Tech Tips
Oldsmobile Delta 88, Non Stop Heater Blower
Q: I have a ‘90 Olds Delta 88 with electronic
climate control. The blower motor will not stop running when I use the off button
and when I turn the ignition off it continues to run. I got under the hood and
unplugged it. What could be the cause of this?
A: It sounds as if
there is a problem with the blower control module. The blower control module,
AKA computer, takes information from the heater and A/C control assembly (the
display with the buttons to push) and translates that information into electrical
power to the blower/heater motor. Why doesn’t the blower turn off with the ignition
switch? The blower control module has battery power to it at all times. A replacement
blower control module may be in your future.