2005 Mercury Marquis Air goes to defrost area.

2005 MERCURY MARQUIS
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MUHAMMAD.FARHAN
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Air Conditioning problem
2005 Mercury Marquis V8 Two Wheel Drive Automatic

Hello,
I am having grand marquis 2005. i having problem with air conditioner that when i drive and give some accelerator the air comes from defrost area and floor. The air remains there until i release the accelerator. can anyone guide me. thanks


regards,
Muhammad Farhan.
Mar 27, 2010 at 9:24 AM
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JACOBANDNICKOLAS
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You are looking for a vacuum leak in this case. The vend doors that direct air flow are actuated by vacuum. When you hit the gas to accellerate, the engine vacuum drops. If there is a leak, the system can not maintain the air's flow. Thus, it changes direction.

Check under the dash for leaks and under the hood. If you are lucky, with the engine running, you will hear a hissing sound from where the leak is located.

Let me know if you have questions.

Joe
Jun 10, 2010 at 8:04 AM