What Causes the Buick Excelle's Air Conditioning to Alternate Between Hot and Cold?

[StElena]

The reasons for the Buick Excelle's air conditioning alternating between hot and cold are as follows: 1. Lack of Freon: It is necessary to check if there is a leak somewhere. The solution is to drip some water at the car's pipe joints; the leaking area will usually produce bubbles. Once the leak is found, it can be repaired, or you can go to a repair shop or maintenance shop to add Freon. 2. Dirty Filter: Locate the bypass valve on the filter base. When the pressure difference on both sides of the valve reaches a certain value, it can be opened. Generally, engine oil flows into the main oil pipeline through this pipe. Use automotive-specific lubricant to lubricate other related components. 3. Insufficient Antifreeze: You should immediately go to the nearest 4S store for repair. 4. Aging Air Conditioning Core: If the car's air conditioning core has been used for a long time, it may be faulty, and you should immediately go to the nearest 4S store for repair.