Q: Heater and air not working

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The heater and AC blower are not working.

Hello. There are several components to the blower motor. While I can’t say that it is common, the motor and resistor do fail. Both will cause the blower to stop working, but there are some differences. If the blower works on high only, but not on low speeds, the resistor is burnt out. If the blower doesn’t work on any speed, it is more probable that the motor is bad. The resistor could still be bad, but it is not as likely. A qualified mechanic, such as one from YourMechanic, will be able to inspect the air conditioning system and determine what part is causing the failure.

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