I have a 99 grand cherokee that started overheating on the road. It started when I turned on the AC. I noticed the temp at about 240 and the AC was blowing warm air. I replaced the thermostat and fresh coolant. It stayed at 210 while driving w/no AC. Idling w/AC it started to rise. It was then that I noticed the cooling fan wasn't coming on. As I checked the fuse which was good, the upper radiator hose blew off and I had to shut it all down.
Any help out there would be appreciated.


Oh, I also replaced the serpentine belt in case it was too loose to turn the waterpump. The old one was all cracked and worn.

replace the relay for the cooling fan which is under the passenger headlite must remove fascai to get there though, they are notorious for going bad