The cooling fan relay is normally located in either
the underhood fuse and relay center
or mounted to the electric fan assembly behind the radiator.
How can you tell if a radiator fan fuse is blown?
The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. If the cooling fan motors burn out or fail,
the cooling fans will be disabled
. The cooling fan motors work together with the cooling fan blades to pull air through the radiator.
What causes the radiator fan not to work?
Six things may prevent an electric cooling fan from coming on:
Defective temperature switch, coolant sensor or other sensor
.
Engine thermostat is stuck OPEN
(engine never gets hot enough to turn on the fan) Faulty fan relay.
Is there a fuse for the radiator?
The fuses inside of the radiator fan
must be in good working order
to make sure that the engine is able to stay cool. Without these components your car overheats. Over time this could create damage that is irreversible.
Which relay is for radiator fan?
The fan relay is usually
located near the bottom of the engine compartment on a metal frame member
. The metal acts as a heat sink to keep the fan relay cool. So, unplug the connector at the relay and repeat the check for power. If you get power, you've got a bum relay.
How do I know if my radiator fan relay is bad?
One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that
your engine is running at higher temperatures than normal
, that may be a sign that the relay is not functioning properly.
How do I know if my radiator fan is not working?
The first part to check is the fan wiring when the fan isn't working. Start by unplugging the positive and negative feed wires (should put out approximately 12 volts DC). Then, check to see if there's current available with a voltmeter. If not, take a
look at the wires and the fan relay under the car's hood
.
Should radiator fan turn on when AC is on?
Both radiator fans should always run when the AC compressor is engaged. To check the temperature at which the fan comes on, turn the A/C off and keep the engine running until it reaches normal operating temperature. Most fans should come on when the coolant reaches
about 200 to 230 degrees
.
Can a bad thermostat cause radiator fan not to work?
Broken Thermostat
Thermostats are known to go bad and cause all sorts of cooling issues. … If this thermostat doesn't open when the engine reaches the working temperature, the coolant will stay inside the engine block and the engine
will start to overheat
. This will result in the radiator fan not working.
What to do if radiator fan is not working?
If the fan doesn't come on, you need to look for
a blown fuse or breaker
. In older cars, you might have a fusible link – this is wire within an insulated block of rubber. Try to grab the end and stretch it. If the wire stretches, the wire link could be broken and you'll need to replace it.
Where is the coolant fan switch located?
The cooling fan switch should be located
near the thermostat housing on the left side of the engine
, behind the distributor assembly.
What fuse controls the AC fan?
Fuse Protection
To protect the blower motor power circuit,
a 20-, 25- or 30-amp fuse
is usually located in the fuse panel under the dash. The rating of the fuse will depend on the vehicle application and how much power the blower motor requires at full speed.
What sensor controls the radiator fan?
On most modern cars, the cooling fan is controlled by
the Engine Control Unit (ECU)
which gets a signal from the coolant temperature sensor.
How much does a radiator fan relay cost?
So, when the cooling fan relay stops working, the coolant can get too hot, and the car can overheat. To get your cooling fan relay replaced, you will pay, on average,
$80-$160
, depending on the type of car you have and the mechanic's fees. The labor should cost around $70, while parts should run you $10-$50.
When should your radiator fan turn on?
Your radiator fan should kick in at
about 200 degrees Fahrenheit
. If you notice your vehicle is overheating or at the very least running hotter than it normally does, listen for the fan to see if you can hear it.
