At least it's strange to me. I've had the truck since October 2017, and I've always had this issue with the AC in that regardless if I have the AC switch pushed on or off, when I turn the on blower fan the compressor turns on. The only way to run the fan and not have the compressor turn on is to pull the compressor fuse. I replaced the relay and that didn't seem to do anything. Has anyone heard of or seen anything like this?