Your suggestion proved generic and useless. I will check the thermostat. Radiator, and water pump. And your website does not provide back and forth dialog just a "no reply" email.
If it continues to overheat after you checked the above mentioned components-and tested good and bleed the system, have it block and pressure tested
February, 21, 2011 AT 2:16 AM
Since the Fan comes on at proper temperature, it can't be the sensor or the relay, but the engine still steams up, the radiator holds pressure, no leaks.
I think it odd that the plastic reservoir did not overflow when the engine over heated, and I don't think its the radiator cap pressure. I don't know how to test the thermostat without removing it. And I wonder if the water pump and/or the thermostat is likely or rare?