Does the fan always run - 1994 Ford Taurus

i always hook the fan to ignition so when key is on so is fan keeps motor running cooler . the temp switch is easy to locate just follow wires but I always just run it to ignition

If you need further help, I’m available over the phone at https://www.6ya.com/expert/richard_b59056c0c62ecb00

pull the connection of the fan switch sender unit in the head (2 wires in a square looking plug) probably next to the temperature gauge sender unit. If pulling the plug stops the fan then the problem will most likely be in that switch keeping the ECM thinking that the engine is running hot.

The cooling fan is controlled by a temperature switch located on the radiator or on the engine. When the temperature of the coolant exceeds the switch temperature rating, the switch closes and energises a relay that switched a voltage to run the fan and it will continue to run until the coolant temperature drops back below the opening point of the switch. In your case, you may need to have the cooling fan replaced.

Temperature sensors trigger cooling fan. But can be a stuck cooling fan relay that refuses to disengage.

This fan will strain charging system and may cause engine to run too cool at times.

Have you checked the coolant fan temperature sending unit?

if the cooling fan is always running its a temp. sensor you will have to consult a repair manual to find the correct sensor

the fan on the trailblazer is attached to the water pump which is always spinning so yes the radiator fan always is running,,its mechanical,not electrical fan

Check the fan relay, probably in fuse box in the engine compartment. Check owners manual to be sure. I have seen these melt causing fan to run all the time.

by the blower moter always being on i would think it would be the blower motor resistor, this controls fan speed and is located under the dash in the blower case easy to replace.

try putting the electrical connector on the other way