What are the reasons for the Honda CRV air conditioning not cooling?
2 Answers
The reasons for the air conditioning not cooling are roughly as follows: 1. Insufficient refrigerant: Insufficient refrigerant causes the compressor not to work. When the refrigerant is insufficient, it will cause the air conditioning clutch to frequently engage, or even the compressor not to work. Check by bridging the low-pressure cycle switch. If it engages, it is mostly caused by refrigerant leakage. 2. Air conditioning clutch relay failure: The air conditioning clutch relay failure causes the compressor not to work. Check the condition of each terminal of the air conditioning clutch relay 14. There should be 12V voltage on terminals 30 and 85; terminal 87 should have a resistance of several ohms to ground; terminal 86 is the ground terminal provided by the PCM. After turning on the air conditioning, the resistance should be below 10Ω. Bridge terminals 30 and 87, and the clutch should engage. Otherwise, it is an air conditioning clutch relay failure (coil failure, poor coil grounding, or poor contact).
Last year when I was driving my Honda CR-V, the air conditioning suddenly stopped cooling, which really worried me. Common causes include refrigerant leakage, which is the most frequent failure point, possibly due to aging pipelines or damaged seals; compressor malfunctions are also common, such as clutch disengagement or internal wear causing the cooling system to shut down; clogged condensers or fans can lead to poor heat dissipation; electrical issues like blown fuses in the car's fuse box or relay failures can also interrupt the current. I first checked if the temperature setting was incorrect and the condition of the fuses myself, then noticed the fan wasn't moving and suspected a motor issue. Regularly replacing the cabin air filter can prevent blockages, but refrigerant leaks require professional repair. Driving without AC in hot weather is extremely uncomfortable, leading to fatigue and distraction, which affects driving safety, so it's best to get it checked and repaired quickly to prevent minor issues from turning into major problems.
