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Re: radiator fan not working but the other one work
One fan is for normal cooling of the radiator.The other fan is controlled by the A/C and also will come on if the coolant temperature rises. If they both do not come on when you turn on the A/C there could be several reasons. If you suspect the fan is bad, disconnect the plug in to the fan and run wires from your battery direct to the fan and see if it operates. If not, your fan needs to be replaced. If it does run then the problem may lie in the fan relay switch or the wiring.
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If you have two electric fans the fan on the passenger side of the vehicle is the radiator cooling fan, that fan should run when the motor gets to hot. The fan on the driver side is the ac condenser fan that fan runs only when the a/c is turned on. The only time that both fans run is if the a/c is on and the motor or coolant is above normal tempeture.
check the fuse to the fan see if it blown, if not move to the relay located under the hood. the relay when energized should make just a little click noise. sometimes the relay from the other fan can be swapped with this one just to check. if the relay checks out good then your problem lies with either the fan it self or the wiring from the relay to the fan.
It is probably easier than you think. Is like five screws and two wires its located on passanger side at feet, a new one comes with a new blade, when you look at the replacement you can tell which screws and wires to remove.
I have a 1997 Buick Century with the same problem. Both my fans work if the A/C is
on as they should. If your turn off the A/C the passanger side fan will not come on
and at an idle the coolant in the radiator will boil, you can hear it in the overflow tank.
If you are driving there is enough air flow thru the radiator that the coolant doesn't
boil and the car doesn't overheat. I have replace the water pump, the thermostat.
and the ETS or engine temperature sensor mounted just above the thermostat in
the thernostat housing, to no avail, I still have the same problem. The only other
thing is the coolant level sensor in the radiator, which I haven't replace yet due
to the fact you have to pull the radiator in order to replace it, which is a major
undertaking. I have a low coolant indicator on all the time on the dash so I have
a pretty good idea the coolanat level sensor is bad. The coolant level is not low
so that sensor is not working as it should. I hope this may help with your problem.
To test you fan raise the hood when it is cold and top off the radiator and fill the
overflow tank to the cold mark. Start the car and let it idle with the A/C off and
see if the drivers side fans comes on. It will have to get to operating temp
before the fan will come on. If it doesn't come on replace the radiator low coolant
sensor on the passanger side of the radiator. If that doesn't fix the problem
replace the thermostat and the Engine Temperature Sensor at the thermostat
housing with an A/C Delco Engine Temperature Sensor. Good Luck..