Radiator Fan Problems: Overheating at Idle, A/C Clues, and Electrical Tests
A radiator fan not working can cause overheating at idle and weak A/C performance. Learn how techs test relays, fuses, wiring, sensors, and fan motors.
23 September 2026
Eric Louwet Auto Body Technician
I had a dead end job.
I wanted a career
I found ATC on the web
The teachers at ATC are knowledgeable, easy to work with and they always answered my questions clearly. The teachers and staff are amazing.
I learned everything I needed to start a career in the mechanic trade
The schedule they offer made it possible for me to work full time during the day and study in the evening, and the study program is up to date.
Eric Louwet, graduate, automotive technician program
