Hello,
I have a 2003 Optima that has approx 42,000 miles on it. Within the past three weeks I have noticed that the temperature gauge will go up near the red zone while driving. I can turn the A/C off and it will go back down to near normal. I have changed the thermostat, the radiator cap, and the radiator is full. There is no leaks I can find and both fans seem to turn all the time. I have also put a volt meter on the coolant temperature sensor and it seems to be within specs, along with the wiring harness. I have also swapped the fan LO relay with the fan HI relay.
The car may run at normal operating temperature for a week or so, and all of a sudden it will begin to run hot all of a sudden. I have no idea what's going on, and I don't have a Chiltons manual. Does anyone have any suggestions?
I have a 2003 Optima that has approx 42,000 miles on it. Within the past three weeks I have noticed that the temperature gauge will go up near the red zone while driving. I can turn the A/C off and it will go back down to near normal. I have changed the thermostat, the radiator cap, and the radiator is full. There is no leaks I can find and both fans seem to turn all the time. I have also put a volt meter on the coolant temperature sensor and it seems to be within specs, along with the wiring harness. I have also swapped the fan LO relay with the fan HI relay.
The car may run at normal operating temperature for a week or so, and all of a sudden it will begin to run hot all of a sudden. I have no idea what's going on, and I don't have a Chiltons manual. Does anyone have any suggestions?