How to Check if a Car's Air Conditioning Needs Refrigerant Recharge?
1 Answers
Inspection methods are as follows: 1. Feel the interior temperature: The most direct way to determine is that after turning on the car air conditioning, there is an obvious lack of cooling. If you sit in the car with the air conditioning on for a long time without feeling a significant drop in temperature, and after ruling out air conditioning malfunctions, then the air conditioning needs a refrigerant recharge. 2. Thermometer: Buy a thermometer, turn on the car air conditioning, place the thermometer at both the air intake and outlet positions for about 5 minutes each, then compare the temperature differences on the thermometer. If the difference is less than 7 degrees, the air conditioning needs a refrigerant recharge. 3. Sight glass: When the car is running normally with the air conditioning on, observe the sight glass. If bubbles continuously appear in the sight glass, it indicates the air conditioning needs a refrigerant recharge. If there are no bubbles in the sight glass when the air conditioning is on, and no bubbles appear after turning it off, it means there is too much refrigerant, and some needs to be released without further recharge. 4. Air conditioning connectors: Open the car's front hood, locate the air conditioning connectors, and check for any oil leaks at the connectors. If there are oil stains, consider recharging the air conditioning with refrigerant.
