Question about 2003 Kia Rio

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Over heaing my 2003 rio is over heating, radiator is full and has no leaks. I was told to check the insidfan but there is only one fan on this car, what could the problem be?????

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  • rjperron63 Dec 19, 2008

    ALOHA And thanks for the advice. I was not sure if it was the fan or the thermostate or the water pump. I have not yet seen the fan run so i will ceck the fuse first, then i will run it with the cap off and see if the radiater circulates the water. as far as the thermostate goes i like it better when they were right up front and on top, two bolts pull it out and put it in a pot of boiling water and wait to see if it opened, i only hope i can find it on this car? I am not even sure waht a thermo time switch is but i will look it up.

    Aloha and much mahalo, e komo mai

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1. take the cap off (while cold!) and see if the fluid starts to move before the engine overheats, if it does not, then replace the thermostat. if it does then check the relay for the fan and/ or the fuse for the fan.

if the fan does not start up by the time it over-heats, then check the thermo-time switch with an ohm meter.

(high ohms while cold, good. low ohms while hot, good.)


Posted on Dec 19, 2008

  • john milligan Dec 23, 2008

    thermotime switch provides the signal to the relay for the fan to turn on and is USUALLY on top of the thermostat housing. look for 2 wires coming off the top. follow the upper radiator hose back to the engine to find the t-housing.

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