I'm having trouble with the AC blower motor going on/off. My car shop can't find the problem. Can you tell me what to tell them in order to get this fixed?
Your car has an automatic temperature control system and it sends signals out to the blower controller in the evaporator housing in the engine compartment. The blower controller is the most common failure along with the blower motor. The blower motor draws too many amps and causes the controller to turn off and on. This burns out the controller and it will need to be replaced with the new blower motor.
How to Identify and Fix Common car Problems ?
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The fan switch may be at fault, but a more likely reason is that a blower motor resistor that controls the voltage going to the blower has packed it in, resulting in only one speed remaining operable – usually the highest speed.
When the fan runs intermittently, it could be one of two problems. First, the motor could be overheating, which causes it to cut out. Alternatively, a loose wire, connection, or a short in the motor windings could be the culprit. Any electrical-related problems should only be addressed by a professional.
Problems include dirty filters, broken wires, poor voltage supply and faulty limit switch or capacitor. You can test your limit switch with a multimeter, and clean the blower motor`s wire coils. If this doesn`t work, you may need to replace your furnace blower motor.
Your AC unit turning on and off repeatedly is one of the most common AC problems homeowners face. It can be caused by dirty, damaged, failing components or electrical and mechanical factors. If your AC unit keeps turning on and off repeatedly, then it`s probably experiencing short cycling.
A furnace cycling on and off repeatedly can be caused by various reasons, from dirty filters and obstructions in ducts and registers to incorrect thermostat settings and faulty limit switches.
A lot of different factors, of varying seriousness, can result in short cycling. The most basic issue to resolve is a very dirty air filter. If your air filter is too dirty, then the AC can actually start to overheat due to the excess strain put on it. Then, it will shut itself down in an act of self-preservation.
If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. The heating and air conditioning systems may still function at one speed, however the resistor will have to be replaced in order for full functionality to be restored.
AC Works Intermittently: When the air goes from cool to warm to cool again, you`re experiencing intermittent problems. This is often due to a clog in the system, a failed compressor or compressor clutch, a faulty condenser fan, a clog in the system, or the actuator directing airflow has failed.
The blower is supposed to last the entire lifetime of your car. However, situations vary and some climates require the fan to be used too often. Many car owners find themselves having to replace the blower after five years. The quality of the motor used to power the blower matters.
Clogged Intake Filters
Without enough air, compressors will stall, and yours may hum when you try to restart it. To check and see if your air filter is the cause of your air compressor humming, unscrew and remove it, then restart your machine. If it works, you need to clean your filter.
Lack of maintenance: This is probably the most common reason that causes condenser fan motors to overheat and shut off. Proper and regular lubrication of the fan motor is necessary for the motor to run smoothly. Periodically making sure that there`s no debris or dust in or around the fan motor is also a good idea.
Weak or Absent Airflow
Weak airflow or total lack of it is the most obvious sign of a bad blower motor. The problem could be due to a clogged blower from accumulated dust or debris. It could also be due to leaky air ducts or a bad capacitor.
Many vehicles have two fuses for the blower motor, one in the interior fuse block and the other under the hood. The blower motor is usually under the dashboard on the passenger side.
The blower motor is an important component of your air-conditioner. If it isn`t working properly, it can significantly affect the comfort level and air quality in your home.
Your car`s blower motor is not only necessary for the operation of your air conditioner. Without a functioning blower motor your engine runs the risk of overheating.
If your air conditioner only stays on for a few minutes at a time and shuts off before it has a chance to cool your home, this is called short-cycling. The issue is relativity common and can have a range of causes, from a clogged air filter to an oversized system.
Most air conditioning units are equipped with a reset button. These buttons tend to be red and quite small. If you`re having a tough time finding it, consult your owner`s manual.
The ECM Motor
In the simplest terms, an ECM motor lowers the total electrical consumption of an AC or furnace and helps to maintain proper air flow through the system. ECM motors contain a microprocessor, which is the key component of what makes them able to provide higher efficiency.
There are a number of things that can go wrong with your heating system, but if the air stops blowing altogether and the same is true on cold air settings, a blower motor replacement is likely in order. The good news is that it`s a fairly straight forward repair.
A fan limit switch is a component of a furnace system that determines when the furnace blower assembly for hot air turns on and off. Essentially, this means that it determines when the hot air should be blown through your ventilation system.
The blower motor relay is the electrical switch that is used to supply the power for the vehicle`s blower motor. The blower motor is the component responsible for pushing air through the vents of your vehicle`s heating and air conditioning systems.