A/C blower fan won?t turn off

[Ozruss90]

Drove home from a car show last weekend and when I got home and turned the engine off, I noticed the A/C - Heater fan was still running. Tuned the key back on and tried the controls on the dash, but made no difference. Turned ignition key off and removed key. Fan still running. Had to disconnect the battery.
Any advise on where to start looking. 1990. #2774

Cheers,
Russell 🇦🇺

[CamP]

May be a bad blower control module. It's on top of the blower box on the passenger side. May also be the blower motor relay.

[Ozruss90]

Thanks CamP.
Got to start somewhere. Until l get it sorted, l will have to disconnect the battery each time l stop. PITA.
Cheers,
Russell 🇦🇺

[CamP]

Originally Posted by Ozruss90

Thanks CamP.
Got to start somewhere. Until l get it sorted, l will have to disconnect the battery each time l stop. PITA.
Cheers,
Russell 🇦🇺

You can pull the power supply connector on top of the blower case. That's a lot easier than disconnecting the battery.

[Mystic ZR-1]

or pull the fuse

[Ozruss90]

Originally Posted by Mystic ZR-1

or pull the fuse

Derrr, l didn?t think about that. Simple solution until l get time to start searching for the problem. Thanks for that 👍

[DRM500RUBYZR-1]

Originally Posted by CamP

May be a bad blower control module. It's on top of the blower box on the passenger side. May also be the blower motor relay.

Spot on!

Marty

[CamP]

The ac fuse may not stop the blower. The blower is wired directly to the battery through a fusible link. The power feed to the blower control module is always hot.

[Starman]

Same thing just happened to me yesterday when going to a car show-man those things are hard on the cars! What was the fix here? Just getting ready to dig in today.


Sent from my iPhone using ZR-1 Net Registry

[Ozruss90]

Originally Posted by Starman

Same thing just happened to me yesterday when going to a car show-man those things are hard on the cars! What was the fix here? Just getting ready to dig in today.


Sent from my iPhone using ZR-1 Net Registry

This is a 2 year old thread. The end result was bought a new control module/resistor as per Scorp508 link to EBay site. Put it in, 2 minute job, and problem solved.