Practice question

A loud knocking from the compressor on engagement that disappears at higher RPM and abnormal gauge readings most likely indicates:

  1. Internal compressor damage (e.g., valve plate or bearing) needing replacement
  2. Low blower speed
  3. A clogged cabin filter
  4. Normal clutch sound

Answer: A — Internal compressor damage (e.g., valve plate or bearing) needing replacement

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