Troubleshooting Charts - Abnormal Noise

Symptom	Condition	Possible Cause	Remedy
Compressor noisy.	Noise from inside compressor.	• Bearing worn or damaged. • Defective cylinder and/or shaft.	Disassemble and replace defective parts.
Magnetic clutch noisy.	Rattling noise when magnetic clutch is not engaged.	Bearing worn or damaged.	Replace bearing.
Noise from piping.	Piping not secured.	Piping vibrating. Pulsating noise resonates into body.	Secure piping.
Noise from condenser.	Condenser vibration prominent.	Condenser mounting stay resonating with body.	Secure by inserting rubber between stay and body.
Noise produced by bracket.	Rattles when touched, continuous rattling heard when operating.	• Bracket cracked or broken. • Mounting bolts loose.	• Replace. • Retighten bolts.
Idler pulley noisy.	• Clattering noise produced. • Rattles when touched.	• Bearing broken. • Bracket cracked or loose.	• Replace. • Replace or retighten.
Noisy crankshaft pulley.	Rattles.	Improperly installed.	Replace or retighten.
Belt noisy	• Belt deflection excessive • Belt side surface worn • Belt worn	• Belt worn • Belt center misaligned • Worn belt causing belt slipping on pulleys and tensioner	• Adjust tension • Align center • Replace belt
Noisy belt tensioner	Squealing belt and/or rumbling noise	Tensioner bearing or tensioner spring weak	Replace belt and tensioner