What Causes the Abnormal Noise When the Car Air Conditioner Starts?

1 Answers
StCecilia
07/30/25 5:38am
Internal Abnormal Noise: This is usually caused by the presence of air or moisture in the refrigerant system, which produces noise during the evaporation and expansion of the refrigerant. Users may perceive the sound as coming from inside the dashboard. External Abnormal Noise: This is typically due to noise from the air conditioning compressor, which can be heard near the compressor. Note: Such abnormal noises are generally caused by air and moisture mixed in the refrigerant. If the noise persists after recharging the refrigerant and is located near the compressor, there is a higher probability of internal mechanical damage to the compressor. If the noise recurs after some time and is located inside the dashboard, it is more likely due to reduced efficiency of the dryer bottle.
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