Les, Just wait till your in stop and go traffic or idleing, In 70 degree weather while driving my fans most of the time never come on. Doesn't get hot enough. But I know summer is coming. Then they will. It's normal to cycle with air on. DMC Joes automatic air bleeder works great. I would recommend it year round and naturally the summer months. I bought two of them. John Hervey www.specialtauto.com