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AC sounds like power steering

ldj1002 on Thu August 25, 2011 3:29 PM User is offline

Year: 2001
Make: Ford
Model: Crown Victoria
Refrigerant Type: 134
Country of Origin: United States

This car has only 51,000 miles. I have noticed recently that there is a whining noise when the AC compressor is on. It sounds like a power steering pump that is low on fluid. This AC cools good and we are having 105* days here this summer, already over 60 of them. I am pretty sure, not positive, that it hasn't always sounded that way. Anything to worry about?

GM Tech on Thu August 25, 2011 3:52 PM User is offline

I just had one of these last week on a Lincoln town car-- power steering whine only with a/c on....answer was to fill power steering reservoir- it was low---it would purculate when a/c was on- allowed air into power steering system through low reservoir-- only connection is the air flow through condenser and power steering cooler when fans were on for a/c...

The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

ldj1002 on Thu August 25, 2011 10:16 PM User is offline

Well, I don't understand but I will check it out.

mk378 on Fri August 26, 2011 9:04 AM User is offline

He's basically saying that whenever you hear noise like the power steering pump starving for fluid, always the first thing to check is the power steering fluid.

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