I am cutting with a guy running a 2000 2388. His header keeps disengaging and the manifold temp warning light comes on. He has replaced the sensor which did not work. Then he wired around it and that still did not work. He has replaced the air filter and cleaned the honey comb in the air filter housing. What could be the problem? Is there another sensor? It only does it in the heat of the day. He stops shuts off the header switch waits a few seconds for the alarm to go off starts the header back a goes again.