Having problems with your 2004 Hyundai Santa Fe ?

2004 hyundai sante fe is making coolant boil back into the radiator reservoir.I"ve replaced the top radiator hose,thermostat,removed the alternator to check the water pump,no leaks.The fans are not coming on.If I turn on the a/c the radiator cooling fans come on but if I turn the a/c off the fans go off.Is there a sensor or a relay that could be causing this?

Posted / edited by AnonymousUser on : 21-05-2018

Answers :

I take it this only happens when the vehicle is stopped & idling? If not, check radiator & hoses for blockage (since you've already replaced the thermostat & top hose) - repair/replace as needed. Next, check the coolant temperature sensor's operation (there are two sensors - one for the temp gauge on the instrument panel, the other is used by the ECM (PCM). If that one is malfunctioning (i.e., telling the computer that the engine coolant temperature is less than it actually is, The ECM (PCM) it won't turn on the cooling fans.
\015\012Since you didn't specify which engine you have (i.e., 2.4, 2.6 or 3.5), Photo locations of all three are included here.
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\015\012Hope this helps.
Look for coolant bleed screws, sounds like air trapped in the system...Check your owners manual for directions on filling, and be sure the have the heater temp control on full hot, when refilling coolant....
Repair Help & Product Troubleshooting for 2004 Hyundai Santa Fe

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