Have 2000 Grande Marquis car. Heat/air fan stays on high all the time. Can't even shut it off.

Asked by Oct 02, 2015 at 04:31 PM about the 2000 Mercury Grand Marquis

Question type: Maintenance & Repair

1 Answer

71,585

Sounds like the controller has failed. It's on the firewall on the passenger's side of the engine compartment. If you have automatic climate control that's going to be it. They're known for failure. HTH. -Jim

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