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SOUND LIKE FAULTY THERMOSTAT.FIRST CHECK TO MAKE SURE YOUR CAR HAS ENOUGH COOLANT IN THE COOLANT SYSTEM.FAST WAY TO TELL YOUR THERMOSTAT BAD.BOTH RADIATOR HOSES SUPPOSE TO BE VERY HOT.IF NOT THERMOSTAT STUCK CLOSED NOT ALLOWING COOLANT TO CIRCULATE FROM ENGINE TO THE RADIATOR.IF THERMOSTAT IS FAULTY.REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.
take the radiator cap off when the engine is cold check the fluid in the radiator,if necessary add fluid to the radiator not the resevoir with the motor running and with the heater on until full leave the cap off untill the motor gets up to full heat and the thermostat is open and pulls the fluid into any unfilled cavities. Add fluid as necessary.
it seems as if there is a clog in the radiator, flush out coolant system and see if this helps.usually when top hose is hot and bottom hose is cold there is a clog somewhere in system. check radiator and make sure coolant is circulating. hope this helps carl,
Usually on most vehicles the coolant temperature sensor sends info to the ecm which then determines when to turn your fan on and off, when you turn the car off the fan may continue to run until the engine reaches a cooler temperature, if the front radiator grill is'nt getting proper air flow to cool the coolant down check the radiator grill for damage or debris build up, if the car has problems over heating check the entire cooling system.