ECM turns AC compressor off when truck comes up to temperature

I had a leak in my radiator that I fixed and now, the ECM turns the AC compressor off once it's up to temperature. Is there a reference for how to troubleshoot the coolant temperature system to Isolate which component is not working right? I have a Haynes manual, but it's fairly useless except for engine rebuilds.

 

Maybe lets us know just what engine .

Are any codes being displayed??

The AC system worked fine till the Radiator mishap ??

The AC compressor shuts off and will not pull in till the engine cools off only to shut off when it comes up to temp again

Try and get a Copy of the EWD very frustrating without