How to Solve the Problem of Car Heater Not Heating Up?

1 Answers
McOwen
07/29/25 11:46pm
Solutions for car heater not heating up: 1. Check if the car's heating switch is correctly set; 2. Inspect the electronic fan temperature control switch; 3. Check the water temperature thermostat; 4. Examine the operation of the blower at various speed settings; 5. Check if the filter is dirty or clogged; 6. Perform timely air bleeding; 7. Use a water gun or air gun to clean the heater core or heat exchanger. Reasons for car heater not heating up: 1. Blower malfunction causing air door flap issues; 2. Faulty water temperature sensor signal; 3. Clogged heater core; 4. Damaged heater flow valve and coolant circulation valve; 5. Air not bled after coolant replacement.
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