Replaced my ECT yesterday. Drove around today and noticed the temp gauge was reading WAY up on the gauge. It wasn't in the red but it was at the last big mark before the red zone.

Stopped and checked under the hood and noticed my cooling fans weren't on. They are programmed to always stay on 2 mins after the car is turned off and they weren't on at all. So I started the car and the fans still didn't kick on. The A/C was on too which should have had the fans on anyways. Right?

Drove up the street to AutoZone and cleared the codes in the computer. The fans then came on and seemed to stay on for the drive home. They were on after I turned the car off too, but for the whole drive home the car was still reading WAY high on the gauge even with the A/C off.

What could be causing the super hot temps fans on or off?