Knocking When A/C or Heat Is Turned On
September 6th, 2016, 6:00 PM
#1
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Knocking When A/C or Heat Is Turned On
Thinking about buying a 91 Caprice from a friend. It's a solid vehicle, but it makes an awful knocking type sound when you turn the A/C or heat on. It purrs like a kitten if they are off. Any ideas? Thanks in advance.
January 22nd, 2017, 3:06 PM
#3
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When you turn the heat on ? Look & see if the compressor is rotating / functing when the heat is on ( not just the compressor pulley , but the clutch is rotating also ) .
Check the belt powering the compressor pulley .
You sure the noise is not from the inside climate control fan ?
God bless
Wyr
Check the belt powering the compressor pulley .
You sure the noise is not from the inside climate control fan ?
God bless
Wyr
