If the relay fails, it will be unable to supply power to the fans, and as a result they will not operate. This can lead to overheating, especially when the vehicle is at a stop, where there is no forward motion by the vehicle to pass air over the radiator.
What does a cooling fan relay do?
The cooling fan relay is an electromagnetic switch that controls the power supply to the engine’s cooling fans. It ensures that the energy-intensive devices only run when needed, usually when the vehicle is immobile.
How do I know if my AC fan relay is bad?
Common Failure Symptoms:
Engine running hotter than normal. One of the first symptoms commonly associated with a bad or failing cooling fan relay is; an engine that runs hot or overheats.Cooling fans not coming on. Cooling fans will not turn off. Normally open. Normally closed. Dual relay.
How much does a cooling fan relay cost?
The average cost for radiator fan relay replacement is between $61 and $68. Labor costs are estimated between $28 and $35 while parts are priced at $33. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location. Related repairs may also be needed.
What causes a cooling fan not to work?
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. A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc.)
Can I drive car without cooling fan?
Yes, you can drive your car without a radiator fan, but you never should. Your vehicle’s cooling system is crucial to its performance, and every time your engine overheats, you cause damage.
Why does my fan run when my car is off?
Why does my Cooling Fan Keep Running After the Car is Shut Off? The cooling fan in your car keeps running long after the car is shut off due to a overheating or fault with the relay. The reason behind this could be faulty temperature sensors or some issue with the cooling fan or ECU unit.
Does a radiator fan need a relay?
Most parts stores carry toggle switches and/or push-pull switches that will handle anywhere from 30-60 amps, so that would work. If you’re using one of those thermostatically-controlled deals (or a low amp rated manual switch) you should use a relay.
How do I know if my radiator fan motor is bad?
If the cooling fan motor fails, the blades don’t spin and they don’t generate air flow. At that point, the engine temperature continues to climb until your engine overheats. Once your engine overheats, you get other warning lights to come on indicating the problem.
How can I tell if my radiator fan is working?
A simple way to check if the radiator fan is working is to start your engine and turn the air-conditioning system (A/C) to the maximum speed. If the fan is spinning, then it means that the fan motor, fuse, wiring, and relay are all working properly.
Is there a fuse for the cooling fan?
The Fan fuse protects the radiator’s electro cooling fans, in practice its breakage protects the whole apparatus from any short circuits or voltage overloads. The Fan fuse is housed in the fuse box located in the engine compartment, generally near the driver’s or passenger’s side fender.
Where is the cooling fan relay located?
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.
