What are the reasons for the Buick Excelle not cooling after replacing the air conditioning compressor?
2 Answers
Buick Excelle not cooling after replacing the air conditioning compressor can be due to the following reasons: Clean the condenser: The condenser is a component that is often overlooked. After long periods of driving, the condenser can accumulate a lot of dust. If the car is frequently driven on dusty roads, the condenser will gather even more dust. Excessive dust on the condenser significantly reduces its heat dissipation efficiency. Poor heat dissipation naturally leads to inadequate cooling from the air conditioner. Repair or replace the compressor: The compressor capacitor may be damaged or malfunctioning. To turn on the air conditioning, the A/C button must be pressed, which controls the compressor switch. If the compressor is not working, the air conditioner will naturally not cool. Add air conditioning refrigerant: If both the indoor and outdoor units are working and the compressor is functioning, the issue is likely due to a refrigerant leak. Adjust the belt tension: The car's air conditioning belt may be too loose.
I just helped my neighbor with a similar issue last month. If the new compressor is installed but still not cooling, the first thought is insufficient refrigerant or a leak. When replacing a compressor, it's essential to evacuate the system, then add compressor oil and refrigerant. If the procedure isn't followed correctly, it's all for nothing. Air or moisture in the lines can trigger high-pressure protection, preventing the compressor from starting at all. Also, remember to check the pressure sensor signal wire—last time, the connector was loosened by a mechanic, causing the system to falsely trigger low-pressure protection. Another small detail: new compressors should have their ports sealed with special plugs during transport. If they're left exposed to dust, it can cause trouble. I suggest having the technician first check the high and low-pressure line readings with a gauge. Abnormal readings can pinpoint whether it's an installation issue or an electrical problem.
