Hi, I have a 02 4 cylinder that was overheating every couple days on my wife. I changed the thermostat with 195, No fix. I then flushed and replaced radiator, water pump and hoses. Still no fix. the fans come on a hair before 210 and little bit further it goes to a higher speed. And starts to suck water. My fan do not turn on at idle with AC on. However if I disconnect the socket connector on the temp sensor with the a/c on the fans will kick on but as soon as I plug the sensor back in they stop. I then replaced the sensor and the same thing happens. I then went to the relay under the head lamp. It was so hot I couldn't grab on to it. The previous owner did bypass the heater core, I asume because it was leaking. I have no white smoke or drips from tailpipe. No leaks, oil looks great. Engine runs great. It has 140,000 miles. Any help would be great.