Blower motor isn’t working
My car has 256000 miles.
My car has an automatic transmission.
I would first check the cabin air filter for blockage. As you have noted though, low air flow could also be due to a failing motor and/or a problem with the resistor block. Occasionally, there are issues with the blend doors and the blower wheel could be blocked with debris (if the filter is missing or perforated, then suspect debris in blower wheel).
If you are looking to have this taken care of, a certified professional from YourMechanic can come to your car’s location to diagnose the AC system and replace the blower motor and/or the blower motor resistor as necessary.
How to Identify and Fix Common car Problems ?
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The most common reason why your blower motor won`t work on any speed is that you have a bad or blown a fuse. A fuse is a small wire inside of a connector that is used to protect the motor itself from a surge of electricity.
One of the first symptoms commonly associated with a fan relay is an AC that blows warm air. If the AC condenser fan relay fails, the AC condenser fan will not receive power and will not be able to cool the AC condenser.
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.
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With regard to the A/C system, if gauge pressures (high and low) are normal when the system does operate, there are really only two principle possibilities for intermittent operation. One is circulating moisture in the system (due to a saturated dryer) which periodically freezes (and thaws) at the expansion valve and the other is a failure in the A/C control system, that is the clutch, sensors, and other electronics that control the compressor cycling. The cause of the problem can be readily found if you request an A/C system diagnostic. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.
It sounds like you may have a faulty blower motor resistor. The highest speed setting may still work because in most cars in the highest fan speed settings the current bypasses the blower motor resistor. In some cars, if the resistor is failed, the fan may stop working completely. Another reason a blower motor resistor may fail is when the blower motor has a mechanical problem or when a foreign object jams the blower motor fan blade and prevents it from spinning freely. This leads to increased current through the resistor and causes it to overheat and fail. I would suggest having an expert from YourMechanic come to your location to diagnose your system to determine what may be causing the fan not to work properly.
In addition to the fan motor, relay, fuse, and blower resistor, the A/C heater controls the fan speed selection. These are known to fail on Chrysler products. A scanner capable of communicating with the climate control system is necessary to diagnose this system. To avoid any unnecessary repairs, have a certified technician, like one from YourMechanic, diagnose your heating & A/C issue firsthand.