How to judge heater failure
The role of your car's defrost heater in the car is to provide heat in the car and melt the ice, snow or frost on the car windows. With it you can clearly see the outside of the car. Here is how to judge whether the car heater is broken.
1. The defrosting heater in the car has several vents on the windows, through which the heated air is delivered to the car. Turn on the heater and face the vent with your hand. If you can feel the air and it is hot, then your heater is working properly.
2. Turn off the radio or other devices, park the car in a quiet place and listen to the sound of your heater fan turning. If you do not hear the sound of the fan rotating or the air moving, it means that your fan is broken, and the heater may be broken. If you can feel the hot air from the vent, but the hot air is not blowing, it means that the motor of your heater is broken.
3. If you can feel the air moving or hear the fan turning, it means your fan is good. However, if the air is not hot, even if the fan is working, your heater may be broken, which requires you to replace the heater.
4. If you can't hear the fan rotating or can't feel the air flow without any heat, it means that the whole defrost heater may be broken. You need to check the fuse box and replace any blown fuses.