Is your car’s
heater/Air conditioner not working properly? Check out symptoms and how to
repair a failing blower motor ~ brought to you by Partsavatar Auto parts.
Blower motor is
considered as the heart of most HVAC systems as these components are
responsible for delivering both hot and cold air though heaters and car air
conditioners respectively on demand. car's Heating and ventilation is important for a comfortable ride.
Almost every vehicle on
the road is equipped with heating and air conditioning system components to
keep the passengers comfortable inside from the harsh weather outside the car. Car
Blower motor serves as main component that blows air
through the vents which is usually controlled by auto
blower motor resister and auto
blower switch.
If it fails, you can
imagine your situation depending on temperature you tolerate.
Failing blowing
motor not only harasses you but will also affect car's window defogger
drastically. So, it is very important for the blower motor to keep on working
properly for your comfort ability inside the car and also for your clear vision
in cold weather as if the defogger disables, you will definitely get into an
accident.
Let’s discuss about
blower motors and its vital components in detail in this article along with
symptoms and repair tips.
Components
of Blower Motor and its location
Components of an auto
blower motor may differ from one model to another but some of the typical
components that are commonly found in every model are:
1. DC Motor
3. Housing that can be
bolted down.
Blower motor uses
following components to control its operation:
1. Blower Motor
Resistor
2. Fan Relay
Blower motor’s
locations also vary from vehicle to vehicle. Typically they can be located in
the heater box while some are buried under the dash. In heavy trucks or
passenger cars, heater boxes and blower motors can be found in the passenger
compartment while in some instances blower motors can also be found in engine
compartments also.
In some large vehicles,
there are more than one motor or heaters used which can be located at two
different location for instance front and rear end of the vehicle.
Its operation is quite
simple. When the voltage is applied to the motor is spins and eventually it
causes the fan to spin. Since the fan is located inside the heater box space,
so it is able to move large volumes of air at high speeds. The blower motor
resistors and fan relays accomplish the task of increasing and decreasing the
speed through speed selector’s directions.
The air flow from the
blower can be channeled to either heat or cool the passenger compartment. When
the heater is preferred air flow is passed through the car
heater core that transforms the air into heated
one. When air conditioner is preferred, the air flow from blower motor is
directed through car air conditioner evaporator to get cool air in exchange.
Symptoms
of Malfunctioning Blower motor
There are handful of
potential causes that could cause a blower motor to fail. It can be anything
from no air circulation to annoying or noisy operation of Heater or car’s A/c.
it is very important to locate the fan components before moving further. Fan
components can generally be found near the evaporator or heater core of the
blower motor. Blower motor is usually mounted in the heater case.
If somehow you are
unable to track the location of either blower motor or fan belt, then no need
to panic as you have another ally in the form of car’s owner manual. You can
easily follow the instructions given by car’s service or owner manual to locate
the blower motor.
On vehicles with
climate control systems, the fans may not activate until the engine heats up. This
is basically done to prevent the circulation of cold air on winter days when
you select heat on the climate control system.
Now let us head to the
main point and determine the symptoms that can alert the car drivers of problem
with blower motors.
Low
Airflow from the Vents
One of the very first signals
of an aging blower motor is less amount of air being blown out of vents. If
when the air or heat is turned on and you notice weak or low air flow out of
vents that may be a sign that you need new blower motors. Old blower motor
might be approaching the end of its service life and might not be able to
produce adequate amount of air flow out of the vents.
No
air out of Vents
Not only low amount of
air flow is the cause of malfunctioning blow motor. But sometimes there can be
no trace of air flow out of vents due to bad blower motor. Blower motor may
burn due to short circuit and it won’t be able to produce air flow.
In this case, it is
better to replace the blower motor than trying to repair it as the burnt circuits
may again cause problem in future. You can also shop for blower
motor without wheel at partsavatar.
Motors
only functions at certain speeds
Blower motors are
designed to work at any speed which is generally operated with the help of
blower motor resistor and blower motor switch. If these two components go
faulty, they will definitely impact the amount of air flow out of vents
produced by blower motor. You will notice air flow being limited to a certain
speed.
It’s better to get the car
blower motor resistor and switch checked and replaced if
needed for your comfort ability.
Fan
Cage is Obstructed
A blower motor can fail
if the fan cage becomes obstructed. This can be caused if an object falls into
the dash vents or a small animal or rodents get into the heater box and pack it
full of dirt and debris. You will need to clean the fan cage and the blower
will definitely start working again properly unless an internal serious damage
is not done to its parts.
Fixing
a car Blower motor
The replacement and
fixing of car’s blower motor and its components are some of the easier repairs
to be performed in automobile world.
However it can be
difficult job on a few vehicles due to their complex structure.
Purchase a new resistor
module at any auto parts store like Parts avatar Canada. First you have to
disconnect the electric connector.
Remove the screws and
swap out the resister module. Remove and replace the faulty motor. Confirm the
heater or air conditioner is working.
Reconnect the electric
connector and you are back in business.
It is recommended to
first check the power connector as sometimes simply replacing connector can
solve a lot of blower motor issues.
So, for your driving comfort
ability, check and replace car’s blower motors and auto
blower resistors connector at affordable prices from parts avatar online auto parts store.
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