What are the symptoms of a faulty car air conditioning resistor?
2 Answers
Car air conditioning resistor failure symptoms include: 1. The air conditioner does not work. 2. The air conditioner may produce abnormal sounds, such as slower operation speed or difficulty starting. Car air conditioning is used to adjust and control the temperature, humidity, air cleanliness, and air flow within the vehicle cabin to optimal conditions, providing passengers with a comfortable riding environment and reducing travel fatigue. Reasons why car air conditioning fan resistors may burn out continuously: 1. Caused by compressor or control circuit short circuit. 2. Faults in condenser motor, compressor electromagnetic clutch, or evaporator motor. 3. The car air conditioning fan fuse does not meet requirements, with too low current value. 4. There is a short circuit somewhere in the air conditioning system, causing excessive compressor load.
I remember driving on the highway that summer day when the AC fan suddenly only worked at maximum speed, with all other settings failing. The car became unbearably stuffy, and I initially thought I had accidentally adjusted it wrong. In reality, if the car's AC blower resistor fails, the most obvious symptom is that the fan only operates at the highest speed, with low and medium speeds either not working at all or completely unresponsive. Sometimes, when starting the AC, the airflow fluctuates unpredictably, accompanied by a buzzing noise, or even severe overheating around the resistor module. I once smelled burning plastic and immediately turned it off to avoid a potential fire. If left unrepaired, the temperature control function of the AC becomes useless, making summer drives miserable. I recommend promptly visiting a repair shop to replace the resistor, as neglecting it could compromise driving safety.