What Causes the Air Volume of Car Air Conditioning to Fluctuate?

[StArcher]

Possible causes of fluctuating air volume in the air conditioning system include: compressor belt slippage or electromagnetic clutch slippage, poor sealing of the air conditioning compressor piston, clogged condenser, condenser cooling fan not working or rotating in reverse, or a faulty expansion valve. Below are related explanations: 1. The right air vent blows cool air while the left blows warm air: This is caused by insufficient refrigerant and can be resolved by recharging the refrigerant. Insufficient refrigerant leads to inadequate cooling capacity. The right vent is closer to the evaporator, so the air blown out remains slightly cool. The left vent is farther from the evaporator with a longer air duct, causing the cool air to lose its coolness before reaching the vent. 2. The air volume switch only works on the fourth setting with no air on other settings: Manual air conditioning systems have a four-speed air volume switch. If the first three settings produce no air and the blower does not operate, but the fourth setting works normally, this indicates a damaged blower resistor. The fourth setting acts as a direct connection, bypassing the resistor, so it remains unaffected while the first three settings are impacted.