Noise Diagnosis for Buick Park Avenue 1998

Blower Motor Noise

1. Foreign material is on the fan.
2. The fan blades are broken or missing .
3. The blower motor has internal damage.

1. Remove the material. Reuse the blower motor if possible.
2. Replace the motor and fan assembly.
3. Replace the motor and fan assembly.

A/C Compressor Noise

1. The compressor mounting bracket fasteners are not torqued to specifications
2. The compressor mounting fasteners are not torqued to specifications.
3. The A/C compressor pulley bearing is faulty.
4. The belt slips.

1. Inspect the compressor bracket to engine torque.
2. Inspect the compressor to bracket torque.
3. Replace the A/C compressor pulley and bearing.
4. Inspect the belt tensioner, the idler pulley and/or the belt.

A/C Refrigerant Lines/Hoses Noise

1. The lines or hoses are grounded.
2. The lines or hoses rub on the other components.

1. Reposition the A/C lines or hoses.
2. Reposition and secure the lines and hoses.

HVAC Module Noise

1. Foreign material is in the A/C module.
2. The A/C module is not torqued to specifications.
3. The actuator door is damaged.

1. Remove the material from the case.
2. Torque the A/C module to specifications.
3. Repair or replace the door(s).