When my car has the ac on every 30 seconds the fan turns on and it’s so loud! When the car is on drive and running, it doesn’t make the noise, but when i stop or it’s not moving it does for like 10sec every 30seconds. We changed the temp sensor and temperature and nothing is working? I’ve looked everywhere to see what it is and have no clue. I’ve noticed the fan isn’t on constantly it’s just on very loud every 30sec for 10sec. Is that normal? What else can I do?