Having problems with your 2000 Mercury Grand Marquis ?
2000 mercury grand marquis HVAC air distribution problem. Air comes out defrost vents regardless of control settings.
Answers :
There is a vacuum motor that controls direction for air flow. when there is a vacuum leak, the control door defaults to the defrost vent. the motor, vacuum lines and directional control knob must be inspected. most of the time i have found that there is a vacuum line broken. purchasing a repair manual will help locate and discribe the system.
Repair Help & Product Troubleshooting for 2000 Mercury Grand Marquis
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