Checking Air Conditioning (A/C) System Function And Noise: General
WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
When fault-tracing ambient temperature should always be at least 18°C or above.
There is always noise when the air conditioning (A/C) system is running. The reason for this is that the refrigerant changes phase between gas and liquid at different pressures.
The air conditioning (A/C) system pump (compressor) produces a soft buzzing noise.
The above noises are normal operational noises from the air conditioning (A/C) system.
This fault-tracing describes partially how to locate and correct abnormal noise from the air conditioning (A/C) system, low frequency rumble or metallic knocking, partly how to fault trace and correct function problems.
WARNING:
Follow the safety instructions for working with refrigerant according to Climate control Refrigerant, Safety Regulations
.
CAUTION:
Read Climate control first General Repair Instructions - Air Conditioning (A/C) System
.
- Continue
Refer to Checking Drive Belt