2000 jeep grand cherokee blower motor replacement

What is a heater blower motor?

The blower motor is a fan located in the heating ventilation and air conditioning (HVAC) ducts, usually behind the glove box. When the heater or air conditioner is active, the blower motor pushes air through the vents.

How does the heater blower motor work?

When you turn on the heater, the blower motor blows it across the hot heater core, sending heat through the vents. Likewise, when the air conditioner is active, the blower motor blows air across the cold evaporator, which blows cold air through the vents.

What are the symptoms related to a bad blower motor?

When the blower motor fails, the air conditioner and heater may still work, and heat or cool may be felt at the vents, but the air pressure will be dramatically decreased. This will occur at all fan speeds, and all temperatures.

Another possible symptom of failure is a rattling or grinding noise that comes from the passenger floorboard anytime the heater or A/C is active. This can be caused by broken fan blades, or a faulty bearing. This noise may come and go at random, and the fan speed may or may not change the noise.

Can I drive with a heater blower motor problem?

Driving with a defective blower motor means you won't have climate control — no air conditioning and no heat. It won't be comfortable — especially if you live in a place with extreme summers or winters — but it is unlikely to affect other components of the car or cause any damage.

How often do blower motors need to be replaced?

There's no set lifespan for blower motors, but they tend to fail more often in high-mileage vehicles. Age can be a factor as the plastic fan blades become brittle over time. The amount of use a blower motor receives may also be a factor. Also, debris entering the HVAC box can destroy a blower motor regardless of mileage or age.

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• Place the vehicle in park, activate the parking brake, and leave the car running.

• The blower motor is located under the dash on the passenger side of the vehicle.

• For easier access to the wiring push the seat back, and place your tools on the floor of the car .

• The blower motor adapter is a bundle of three wires located on the left side.

• While the vehicle's ignition is on, push and pull gently on the wire connection.

• If the blower motor turns on, you have identified the problem and following this guide will help you fix it

• If the fan does not turn on, the damage may not be fixable without purchasing new parts.

• For your safety do not grasp any wires you can not see. Do not attempt to grasp any wires that are not covered in insulation and/or electrical tape.

• Turn off the ignition on the vehicle and proceed with the following steps.

• There are two screws holding the adapter in place. Using a Phillips head screwdriver, remove both screws in order to remove and gain access to the adapter.

• The two screws are identical. Be careful not to lose them.

• Be sure the car is completely off before unscrewing anything.

• The fault typically occurs at the connection between the three wires and the adapter box.

• Observe the damage and decide if electrical tape will be enough to hold the wires in place.

• If so, using electrical tape, wrap the wires tightly until they are securely in place.

• Replacement parts are available for purchase if the damage is beyond your repair capabilities.

• Screw the adapter back into place.

• Turn on the car and test the AC/Heater to make sure it works.

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