Condition
| Possible Cause
|
Compressor
Noise
| Resonant compressor noises are not a cause for alarm. However, irregular
noises or rattles may indicate broken parts or excessive wear.
| • | The A/C system is overcharged. Refer to Refrigerant
Recovery and Recharging
. |
| • | The compressor mounting bolts are not torqued to specification. |
| • | The compressor pulley bearing is faulty. |
| • | The compressor drive belt is slipping. |
|
Refrigerant Line/Hose Noise
|
| • | The lines/hoses are grounded. Reposition the A/C lines/hoses. |
| • | The lines/hoses are rubbing on other components. Reposition and
secure the A/C lines/hoses. |
|
Internal Compressor
Noise
|
Replace the compressor. Refer to Compressor Replacement
.
|
Compressor Clutch Noise
|
| • | A faulty compressor clutch. Replace the compressor clutch. Refer
to Compressor Clutch Coil Replacement
. |
| • | A faulty bearing. Replace the compressor. Refer to Compressor Replacement
. |
|
HVAC Case Noise
|
| • | Foreign material is in the HVAC case. |
| • | The HVAC case is not torqued to specification. |
| • | The actuator doors are damaged. |
| • | The actuator door seals are damaged. |
|
Blower Motor Noise
|
| • | Foreign material is on the fan. |
| • | The fan blades are damaged. |
| • | The blower motor has internal damage. |
|
