Whistle/buzz in heating/cooling system
jaws38
08-18-2005, 07:57 PM
My 2000 Crown Vic makes a buzzing sound when the climate control system is either off or any setting besides Defrost or Floor/Defrost is on.
To drive without hearing this buzz you have to have Defrost or Floor/Defrost on.
When you accelerate steadily the buzz goes away, so it seems to be related to the vacuum. Also it doesn't start until the engine has been operating for a while.
The Ford dealer couldn't reproduce it, probably because they didn't test-drive it long enough or they just idled in their garage.
Anyone ever heard of this or similar?
To drive without hearing this buzz you have to have Defrost or Floor/Defrost on.
When you accelerate steadily the buzz goes away, so it seems to be related to the vacuum. Also it doesn't start until the engine has been operating for a while.
The Ford dealer couldn't reproduce it, probably because they didn't test-drive it long enough or they just idled in their garage.
Anyone ever heard of this or similar?
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