Sounds like you have done all but 2 things to treat this. Double check the wiring to any loose connections or breaks. If good replace the electric fan itself. Because of the nature of electric fans most are not engaged when the vehicle is moving but should kick in when it is sitting engine on even if the AC is not running. The AC control actually provides extra voltage to the fan to run at a higher speed. It sounds like you have lost one of the speeds to your fan.
Testimonial: "Thanks i will try it "
Sounds like an air lock, from when you changed the water pump, most likely. Take a heater hose off, and try and get some air out of it. Then, idle it with the rad cap off, until the thermostat opens. You should see the water level drop when it does. If not that, then the sensor for your fan needs to be replaced. The fan always comes on when the AC is on, but the sensor turns it on when the AC is not on.
Testimonial: "What sensor would that be? Thanks for the quick response "
It's the engine coolant temperature sensor. Maybe that's the one you already changed. Check your fan relays. They should be under the hood in a fuse/relay box, and they will be clearly identifiable by viewing the decal on the inside or outside of the lid.
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