Abnormal operation of radiator fan

**jvnj** · April 23rd, 2015 04:07 PM

Masters,

Last year I bought a toy car for my wife, its a 2000 Kia Pride GTX AT. So far, all of the mechanicals are running smooth & well. My only problem is the radiator fan which activates only when the temperature is already very high (almost near the overheat mark). There's no problem if you turn On the AC as the radiator fan runs with the condenser fan. I already tried replacing the thermo switch with a replacement and original brand (tried 2 different sets), but to no avail. Radiator has been cleaned too, and i'm currently using distilled water with coolant. By the way, the thermostat valve was also intact and replaced with OEM last December.

Is there a lower temp rated thermo switch I can buy? Your suggestions will be greatly appreciated.

Thank you

**StockEngine** · April 23rd, 2015 05:54 PM

was the radiator cleaned inside and out?

**Ry_Tower** · April 23rd, 2015 07:13 PM

Originally Posted by jvnj

Masters,

Last year I bought a toy car for my wife, its a 2000 Kia Pride GTX AT. So far, all of the mechanicals are running smooth & well. My only problem is the radiator fan which activates only when the temperature is already very high (almost near the overheat mark). There's no problem if you turn On the AC as the radiator fan runs with the condenser fan. I already tried replacing the thermo switch with a replacement and original brand (tried 2 different sets), but to no avail. Radiator has been cleaned too, and i'm currently using distilled water with coolant. By the way, the thermostat valve was also intact and replaced with OEM last December.

Is there a lower temp rated thermo switch I can buy? Your suggestions will be greatly appreciated.

Thank you

Baka puwede i-fix na lang radiator fan sa pag-andar nang makina para sabay na. Or direct mo na lang at i-bypass mo na thermo switch.

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Originally Posted by jvnj

Masters,

Last year I bought a toy car for my wife, its a 2000 Kia Pride GTX AT. So far, all of the mechanicals are running smooth & well. My only problem is the radiator fan which activates only when the temperature is already very high (almost near the overheat mark). There's no problem if you turn On the AC as the radiator fan runs with the condenser fan. I already tried replacing the thermo switch with a replacement and original brand (tried 2 different sets), but to no avail. Radiator has been cleaned too, and i'm currently using distilled water with coolant. By the way, the thermostat valve was also intact and replaced with OEM last December.

Is there a lower temp rated thermo switch I can buy? Your suggestions will be greatly appreciated.

Thank you

Baka puwede i-fix na lang radiator fan sa pag-andar nang makina para sabay na. Or direct mo na lang at i-bypass mo na thermo switch.

**vvti2.0** · April 23rd, 2015 07:19 PM

Pwede ka magdesign or magpadesign ng circuit na kapag umaandar ang alternator saka lang aandar ang radiator fan mo. Current sensor lang yan. Ampangit kasi nung design na nasa engine on ang switch ng radiator fan.

**rodetor** · April 23rd, 2015 09:06 PM

Have you check its thermo sensor, for the temp gauge? Accurate or within specs pa kaya? When you activate your A/C, does your temp gauge reads normal range or not?

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**rodetor** · April 23rd, 2015 09:10 PM

Thermo switch is for radiator fan.
Thermo sensor is for temperatue gauge.

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**jick.cejoco** · April 23rd, 2015 10:10 PM

Originally Posted by rodetor

Thermo switch is for radiator fan.
Thermo sensor is for temperatue gauge.

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Fan thermo switch-radiator fan

Coolant temperature sending unit-temperature gauge

Coolant temperature sensor-input to the pcm(may also be decision factor to turn radiator fan on)

**t2erns** · April 24th, 2015 10:52 AM

i am not familiar with the fan set-up of your kia, but is it really controllled by thermoswitch (if it is, the fan should kick-in after reaching the pre-set temp value)? my guess is, it might be controlled by the ecu based on coolant temperature sensor. do you have 2 fan relays on the fuse block?

**jodski** · April 24th, 2015 11:02 AM

Possible faulty relay bro. Check mo din wiring from thermo switch going to fan

**zen..** · April 24th, 2015 12:41 PM

Bro try mo i ground yung temp sender wire sa body and check kung hangang saan gauge mo. Dun mo makikita san kalahati ng gauge. Yung iba kasi nagloloko and sobra sobrang doble sa high ang reading