How To Test Blower Motor Resistor Silverado If it’s good, check for debris on the evaporator or heater. decreased airflow causes the blower motor resistor to overheat and fail. reduced airflow also causes the blower motor to work harder, draw more current and that can cause repeat blower motor resistor failures. the blower motor fuse blows repeatedly. the blower motor is drawing too. Power flows to a blower motor relay first. when you turn the key on, the relay provides power directly to the blower motor. switching the fan on tells the heater control unit to send a pulsed voltage signal to the power transistor. by pulsing the transistor at different rates, the control unit can alter the speed of the blower motor.
How To Test Blower Motor Resistor **want to own the tools i use ?? click on the amazon link below to get my top 5 tools i use**automotive test light amzn.to 3z1pdxaflexible backprobe. How to test the resistance or failure in a blower motor resistor pack with a multimeter. why do they fail and what are the symptoms? please subscribe for mor. How to test your blower motor and resistor without taking your dashboard apart.time stamps (click the time to go to that part of the video)0:00 how to test b. The blower motor resistor is responsible for controlling the speed of the blower motor in your car’s hvac system. it works by regulating the amount of electrical current that flows through the fan motor. the resistor does this by varying the resistance of the coil. the higher the resistance, the less current flows through the motor, which.
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