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What is the reason why the car air conditioner only has wind at the 4th speed?

1 Answers

SanSienna

07/29/25 9:59pm

The reason why the car heater switch only has wind at the fourth speed is due to the burnout of the heater blower speed control resistor. Specific information is as follows: 1. The solution is to promptly go to the car's 4S shop or repair shop to replace the heater blower speed control resistor, which can solve the problem of the car heater's air outlet failure. 2. Automatic air conditioning and manual air conditioning: Both automatic and manual car air conditioners are similar when turning on the heater. They both adjust the temperature by rotating the temperature control button, with the red area indicating an increase in temperature. However, the automatic air conditioner can set a specific temperature, and it will automatically adjust based on the temperature inside the car. Some car owners, afraid of the cold, turn on the heater immediately after starting the vehicle, thinking it will quickly raise the interior temperature, but this method is actually not effective.

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