Working on an overheating issue on my 2008 Mustang GT. Car starts normally after sitting all night and fan starts up when I click on the AC. Let the car run (or drive it in traffic) and as soon as the needle gets to normal the fan shuts down. this of course causes the radiator to start heating up shutting down my AC before going in the RED. I immediately turn on the heater with fans on high and temp starts retreat towards normal. 3 fans later it is doing the same thing. Took it to the local mechanic and the computer says all systems are green and all circuits are good. Hoping someone who has solved this problem can help.
Need to mention. The mechanic also checked the low and high speed relays as well as the fuses. all good.
So here is the latest: Took it to a local mechanic recommended by a trusted mechanic who raved that this guy was a "Mustang Specialist". Of course the problem could not be replicated. I tried for an hour and this thing would not perform as described above. Drove away and the car shuts down abruptly 2 miles down the road but not due to overheating. Got it restarted and back to the specialist. He hooks up a computer and takes it for a 30 minute ride. Comes back and says he cleaned the Air Flow sensor and the throttle body because they were both filthy. Meanwhile no sign of an overheat condition. The car now has more jump from the light and idles smoother. I'm waiting for the next 90 degree day before i call it a complete success but so far, so good as there is no hint of overheating. More update later.
Cleaning the air flow sensor and the throttle body did improve idle and overall performance but as soon as the cold front left and the weather got hot the problem with the fan stopping at high temp returned. Back to the mechanic!