Why is My Car Heater Not Working? | O'Reilly Auto Parts
https://www.oreillyauto.com/how-to-hub/how-to-diagnose-car-heater-failure
WEBThere can also be issues with a heater’s blend door or actuator, which control not only how air is routed into the cabin—including settings like floor, defrost or re-circulation—but also the ability to fine-tune the specific temperature of the air coming through the vents. Heater Symptom 3 – My Car’s Air Is Blowing, But It Isn’t Warm.
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