What are the troubleshooting steps for a refrigerated truck not cooling?
2 Answers
Common causes of refrigeration unit failure in refrigerated trucks are analyzed as follows: Refrigeration unit pipeline leakage: For units that use Freon, this issue is relatively common. Since Freon circulates in a nearly sealed pipeline, there should be no natural loss. If leakage occurs during Freon charging, methods such as pressure testing should be used for detection or immediate repair. Refrigeration unit compressor failure: Overheating of the refrigeration unit compressor can cause the protector to fail. If the unit itself is functioning properly, the issue likely lies with the compressor. Refrigeration unit pipeline blockage: Blockages can occur due to incomplete vacuum extraction or moisture leading to ice blockage.
A refrigerated truck not cooling is indeed a headache. I've dealt with many similar cases before. The most common issue is refrigerant leakage or insufficient levels – just like a car can't run without fuel, you need to check if there are any pipeline damages. If the compressor's belt is loose or broken, the entire system will fail, so listening for abnormal noises during startup is crucial. When the condenser gets clogged with mud splashed from the road, heat dissipation becomes impossible, especially in summer when it's prone to overheating and shutting down. Power issues shouldn't be overlooked either – problems like low battery voltage or generator failure can cause the refrigeration system to stop working. Aged door seals leaking cold air can also prevent temperature drop – I've seen this several times, and replacing the seal usually solves it. Circuit board malfunctions are more troublesome; I recommend using professional equipment to check circuit continuity. Always test the refrigeration function before loading cargo – don't wait until you're on the road to discover problems.
