The compressor is the heart of any air conditioning or refrigeration system, so when it starts showing signs of not working correctly, technicians must act quickly in order to find out what is wrong.

In this troubleshooting situation you have responded to a complaint that a 4-ton package unit air conditioner is not cooling. When you arrive, you find that the indoor air handler is running, the ...

Admit it. A truck’s air system probably isn’t your most pressing maintenance concern. The systems are pretty reliable, and beyond changing the air-dryer desiccant cartridge every couple of years, you ...