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Symptoms of a Bad or Failing Heater Blower Motor
If your car's heater doesn't work, only works on certain speeds, or only cold air comes out, you may need to replace the heater blower motor.
Symptoms of a Bad or Failing Condenser Fan Relay
If your car's AC is blowing hot air or its engine is overheating, you may have to replace the condenser fan relay.
Symptoms of a Bad or Failing Cooling Fan Relay
Common signs include the engine running hot and cooling fans either not functioning or running all the time.
How Long Does a Cooling Fan Relay Last?
The purpose of the cooling fan relay is to pull air through the A/C condenser and the radiator. Most vehicles have two fans, one for the radiator and one for the...
Symptoms of a Bad or Failing Cooling/Radiator Fan Motor
If the fans do not come on, car overheats, and fuses blow, you may need to replace the cooling/radiator fan motor.
How Long Does a Cooling/Radiator Fan Motor Last?
The cooling/radiator fan motor is part of your vehicle’s cooling system. It transports heat away and dissipates it into the outside air. The fan motor is the part that actually powers...
Symptoms of a Bad or Failing Cooling Fan Resistor
Common signs include the engine overheating, cooling fan only working at certain speeds, and the fan never turning off.
How Long Does a Cooling Fan Resistor Last?
The purpose of the cooling fan resistor is to remove heat from the engine’s coolant and from the A/C refrigerant. The resistor does this by drawing air through the radiator and...
Symptoms of a Bad or Failing AC Fan Control Module
Common signs include cooling fans running for a long time or not at all, as well as weakened air flow. Without fixing, your car may overheat.
How to Buy a Good Quality Cooling/Radiator Fan Motor
Fans are necessary to keep the components under your car’s hood from overheating. Excessive heat can cause warping, melting, and other damage, not to mention the additional energy suck. The radiator...
How to Replace a Cooling Fan Resistor
The cooling fan may not work at all speeds if the resistor is broken. If the engine overheats or the fan never turns off, the resistor may be faulty.
How Long Does a Fan Clutch Last?
One of the most important parts within the cooling system of your vehicle is the fan clutch. It’s not a part that comes up often, as it’s usually pretty consistent. However, if...
How to Replace an AC Condenser Fan
AC condenser fans need to be replaced when the air conditioning stops running. If the AC fans don't work when the car is on, the fan relay may be bad.
How to Replace a Fan Clutch
A fan clutch controls the car engine cooling fan and operates on temperature. It's mounted to the water pump and can cause overheating if it's broken.
How to Replace a Radiator Fan Motor on Most Cars
The fan motor on the radiator fails when the engine overheats and the fan does not activate. This means that the coolant cannot cool the engine well.
How to Replace a Condenser Fan Relay
A condenser fan relay operates the fan that removes heat from the engine. If faulty, it will not allow the A/C to blow cool air or function at all.

Related questions

Question
Cooling fan continue to run. Replaced cooling fan switch and temperature switch, replace relays 1999 Honda
Hi there - yes, some Honda models (Accord) have a cooling fan control module, and some models have a timer for the cooling fan. This feature would allow the cooling fan to continue to run for a brief period after...
Question
Cooling fan runs constantly - 2003 Saturn L200
Hi there - I think you are on the right track looking at the cooling fan control module as the failure point. I would not expect that you fixed anything by jiggling it. Most likely, a relay is stuck shut...
Question
When i shut off my car the heater blower keeps going with unit off and car off. 2006 Chevy Trailblazer
Hello - either the relay is stuck in the "On" position from burned contacts or the heater switch is similarly stuck in the "on" position (internal contacts at least). I would recommend an electrical inspection by a mobile, professional mechanic,...
Question
BOTH AC FAN AND RADIATOR FAN NOT COMING ON
The problem you are describing likely stems from an electrical fault which would include things like a break in circuit wiring, bad grounds, relays, fuses, resistors, the fan motors themselves as well as the engine cooling temperature sensor. If engine...
Question
engine overcooling; engine fan always on!
Hi Alex....yes, that sensor could be a possibility but there are other components in the circuit as well such as relays (that can stick on) and, although not as likely, there are possible wiring faults that can cause continuous power...
Question
Fans on my radiator aren't working 2003 Honda Accord
Hi there - there are 2 components that drive cooling fan operation: temperature sensors on the radiator, and the air conditioning switch. Even if the engine temperature (measured at the radiator) isn't hot enough to switch the fans on, turning...
Question
A/C compressor clutch does not engage, cooling fan does not turn on, condenser fan does not turn on, and ceiling light does not turn on.
Hi there. The air conditioning clutch could be not working for the refrigerant could be low or the clutch could be burned up. Check the air conditioning compressor clutch wiring for a voltage with the a/c switch on high and...
Question
Cooling fans is not working. Replaced the temperature sensor and the fan is still not working. Disconnect the sensor harness and the fans works.
Hi there. There could be an issue with the electrical wiring to the fans from that connect to the coolant temperature sensor. Check the wiring for any loose connections or any corrosion that could keep the sensor from making a...
Question
If you was hooking up a OEM cooling fan that has only 2 wires and one speed but my car has a high and low speed, what wires would you hook up?
Hi there. Check the high and low circuits with a digital meter for a voltage reading. The low should have a lower voltage reading than the high. I recommend putting the wires on the high selection to prevent the engine...
Question
1992 Honda Accord cooling fans not operating properly.
Hi there. Your issue is the ECT sensor B is not closing the loop when engaged. There is power to the sensor A from the computer, but the sensor B is not connecting when the vehicle is running hot or...
Question
Car is overheating everytime i drive it for about 15-20 minz
Hello there, many faults will cause your 2004 Cadillac SRX to overheat after driving for 15-20 minutes. When head gaskets fail the most common signs are the coolant level dropping without visible leaks, white smoke from the tail pipe, and...
Question
Heater fan seems to surge
Hello. Your vehicle does use a vacuum operated heater control valve to allow hot coolant into the vehicle's heater core so that warm air can be generated. If you hear an opening and closing sound then it may be possible...
Question
my heat gauge goes up when idling then comes back down when driving
It sounds as though you are probably having an issue with the cooling fan(s). The primary function for the cooling fan(s) is to push/pull air through the radiator at low speeds, or at a stand still. When stationary, there is...
Question
Hello Chris, What kind of radiator do I use to replace my 2006 model Toyota Highlander
Radiator leaks are caused by corrosion and/or mechanical failure (perforations). Whether the radiator leaked, or is leaking, is not relevant to a decision about switching over to a different design or a version of a radiator that might have additional...
Question
what needs replaced?
The erratic getting hot and cold is most likely from the thermostat is stuck or sticking. You should also check to see if the fan clutch is locking up correctly and may need to be replaced also at the same...
Question
Do I take off the fan to change my alternator belt?
The fan is the first thing to come off. The fan clutch is mounted on the water pump by a big nut. The nut has reverse threads, so it is loosened by turning CLOCKWISE rather than the normal counter-clockwise. You...
Question
Radiator fan scrapes against shroud, car won't idle.
Hi there. The cooling fan could be coming apart hitting the shroud or the shaft could be bent. The stalling of the engine could be caused by the computer shutting off the engine due to a vibration that the knock...
Question
When replacing my fan clutch should I change my cooling fan to a flex-a-light and get a new flex-a-light clutch?
Hi there. It is best to always put on the OEM parts that are required for the vehicle. However, you can get a flex-a-light clutch fan for your vehicle as long as it will bolt up to your water pump...
Question
Check engine light is on.
First of all, a shop cannot let a vehicle leave the parking lot with the engine light on without your signature saying that you intend to leave with the light on. Second of all, the light might have been on...
Question
engine fan noise
The engine should always operate in the "normal" range as shown on your temperature gauge. If the temperature is too high, shut down the engine as overheating can have disastrous consequences (costly repairs). If too low, that is not an...

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