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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
My radiator fan broke from hitting the shroud.
Hello Jennifer. One way you may be able to tell if the new fan is going to work will be to figure out why the old fan was being interfered with. Was anything about the shroud or the original fan...
Question
Where is the heater fan blower motor relay located? 2003 Chevy Silverado 1500
Hello - the blower fan relay is located behind the glove box - small black plastic square. Make sure both fuses for the HVAC/heater are good, and have power to them (one is 10 amp, one is 30 amp). If...
Question
Engine takes to long to warm up I've replaced thermostat already and it misses horrible till it warms up its a 4.9 engine
This engine uses a cooling fan clutch that controls the fan speeds on demand when the engine radiator starts to get hot if increases air flow to cool the engine down and slows the fan when it needs to increase...
Question
Overheating
This may be related to a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working...
Question
Fan wont blow out top vents for defrost.
Hi there. Check the blend doors to the vents and see if they move when the switch is turned. If they do not move, then check for a vacuum hose to the blend door actuator. If there is no vacuum...
Question
Engine takes too long to warm up runs poor until it warms up.
There is only two possible causes of an engine running colder than it is supposed to. The fan clutch may be locked up and would cause a load on the engine and excessive airflow across the radiator not allowing the...
Question
Over heating
This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning...
Question
Temperature fluctuates up and down
The coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time or...
Question
Cooling fans will not shut off
The coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time (as...
Question
Failing fan clutch symptoms
What you described is happening is normal cooling fan clutch operation. When you first start the engine the cooling fan clutch will be in the full engaged position and may take a minute for the internal fluid to move back...
Question
My truck shakes while idling when the heat, AC and in-cab fan are on
This may be a sign of a faulty MAP sensor. The Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal that is proportional to the amount of vacuum in the intake manifold. The engine computer then uses...
Question
Heater and air conditioning fan stuck on low
The push button panel for your climate control is also the control unit. It uses the signals from various temp sensors to decide what to tell the climate control what to do. It also decides on the fan speed and...
Question
I went to an automatic car wash and 2 minutes after that my car's dashboard flickered and the car died.
You are likely experiencing an electrical short of some kind. This is likely due to a wire or electrical component being exposed to the water from the car wash. A number of electrical components will become damaged when exposed to...
Question
My Saturn L100 is overheating
The vehicle could be overheating for several reasons. The thermostat is a good place to start, but there are other ways the coolant can become clogged or have poor circulation. The coolant flows through water pockets in the engine, pulling...
Question
My radiator fan is running very slowly, any advice you can give me to fix this issue?
You are correct. The fan motor has too much resistance and will not allow the full amount of current into the motor from the battery. I recommend replacing the fan motor. Also, check the voltage on the harness to the...
Question
My car fan runs on 2 speeds - can I replace the radiator fan resistor?
Hello - I believe this is normal behavior, and handles cooling the engine down appropriately (i.e. fan speed changing based on how hot the engine was when running) upon shutdown. There are problem cases where the radiator fan runs on...
Question
My car is over heating while sitting at lights, fluids have been checked and are OK.
This is a classic sign of a radiator fan that is not working. When your car is moving, air is being forced through the radiator and cooling your coolant. At slow enough speeds, the air flow is not enough. There...
Question
Radiator fans wont turn off unless I turn off the car, why?
It sounds like you have checked just about everything that controls the fans other than the fan power relay itself. As you may know the coolant fan relay turns the fans off and on by receiving information from the coolant...
Question
Van not blowing hot or cold air 2006 Chrysler Town & Country
Hello - the lack of fan functionality in the front only of your van could be caused by either the front fan, the fan control switch or the front fan motor resistor pack failing. If the front fan works in...
Question
Overheating car after running for 30 minutes
Hello there, many different faults will cause your 2002 Chrysler Sebring to overheat after running for 30 minutes. The most common faults are the water pump, radiator, air bubbles in the coolant, or airflow ducting to the radiator. In many...

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