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2006 Grand Marquis noise from AC

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Old 05-28-2018, 09:46 PM
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Join Date: May 2018
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Default 2006 Grand Marquis noise from AC

My Grand Marquis has a clicking noise from under the dash intermittently when the key is turn to run and at other tomes after the engine is running. It lasts for about 2 seconds and then stops. I can also hear it if I lower the temperature after the car is running with the AC on, in this care I can stop the noise if I turn the temp up a degree. The temperature control unit has been rebuilt with new O rings, and that did not stop the noise. Any ideas on what is causing the problem and how can I fix it?
 
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