i have a 1994 thunderbird supercoupe and the radiator cooling fan doesnt turn on ever, any possible causes?

Question

My car is a 1994 Thunderbird SC, the temp gauge and thermostat work well but the cooling fan will not turn on no matter how hot the engine gets, any reason why this may be happening?? solutions?

Answer 1

As the second two answered you, not the first. Also the fans normally run full time if you have the A/C on max and should cycle on regular A/C. If they are not start at the fans and see if you have power/ground, then work your way back, fuses,relay, switches, wiring.

Answer 2

Either the radiator cooling fan motor is gone out, the cooling fan relay is faulty or the radiator cooling fan temperature sensor or its wiring circuit is faulty. This is also caused by air pockets by the temperature sensor from low coolant. First check the coolant level to be sure there aren't any air pockets in the system. Check the fan itself by energizing it outside its regular circuit. If the the fan works, then check the relay for the circuit to be sure it operates and there is no resistance on the relays closing circuit. If the relay is good then check the radiator fan coolant temperature sensor that it operates to specifications. If the sensor is good inspect the coolant temperature sensor wiring for open or broken wires by checking the resistance from the circuit and check for computer voltage to the sensor. If the circuit has one wire grounding the connector at the sensor end should activate the fan and if a two wire circuit completing or closing the circuit at the sensor connector end will also activate the fan.

Answer 3

We're talking the cheap and dirty solution? The one that doesn't require a mechanic? Just buy a replacement fan (junkyard), mount it in front of the rad, and direct wire it to a switch with an add a fuse between the power supply and the fan. Turn the fan on when you're idling/sitting in traffic.



It's probably some relay that's f-ed and honestly...probably not worth the trouble to tear it apart and start replacing electrical because it's going to end up costing you more.

Answer 4

run a straight 12 volts to the fan to see if it works. check the fuse to the cooling system and then test out the relay. the computer is what activates the relay to turn in the fan through the relay.

the temp sensor is also known as the sending unit, there is not a switch.

Answer 5

The fan motor is shot or the temp switch is bad. You can jumper the temp switch to test for 12 volts at the fan plug. if you get 12 volts the fan is bad. You also might have a bad fan relay. Check that first along with the fuse then proceed with the other stuff i mentioned.

Answer 6

replace the coolant temp switch that operates the relay for the fans. And check the relay and fuse first.

Answer 7

I've seen the AC low pressure switch go bad and won't let it come on, I bypassed it with a paper clip and everything worked..it will burn up the AC pump, so unplug it.. you might try and see if it will come on when you put the heater control in the AC or defrost position..

Answer 8

I don't have a 1994 thunderbird supercoupe so I don't have a radiator cooling fan problem.