
How a heater works on a Toyota Previa
In the middle of winter it is a definite asset on the road when you go to work. And when the latter does not activate, we notice it ardently. Therefore to understand where the malfunction comes from, it is necessary to know how it works on your Toyota Previa, at least in a simplified way. The heating uses engine temperature to increase heat personalised tour, then generally the cooling mechanism. In fact, this duplicates. Also, the fan mechanism, so that the air arrives in the cabin has a double system. It's the ventilateur which emits air when the vehicle is traveling at low speed or not at all, then it is the speed of the car which allows the air to be sent when you are driving at high speed. Well designed, right?
Recurring heating problems on a Toyota Previa
Broken thermostat
The idea is easy, in the case where the thermostat which regulates the heat does not really measure the temperature of the water circuit, the whole of the latter is impacted. Even if your Toyota Previa's thermostat no longer works correctly, the heating will still work. Because the temperature coming from the engine will increase over time, and the water circuit at the same time, even without a thermostat. The only annoyance is that you will have trouble controlling the air temperature.
Air shutters blocked on the Toyota Previa
It is a dysfunction that happens quite regularly. These shutters, which allow you to direct the air or adjust the intensity, sometimes get blocked over time. To remedy this it is simple, remove the cover and look inside how it was done. Activate the mechanisms to see where it is blocking. Put a little WD 40 to lubricate and voila.
Defective fan on Toyota Previa
You have now entered, the fan is useful only at low speed or when stopped. If your heating system does not generate heat at low speed and you nevertheless perceive its noise, this means that the fan turns out to be definitely defective. Normally, thanks to more speed, your Toyota Previa will heat. In case the fan does not work it will have to be changed.
Blocked hoses
The symptoms will be relatively simple. When your heating turns and does not create heat or very slightly, the malfunction probably comes from the hoses. These clog up over time and no longer allow hot water to access the heating of your Toyota Previa. Therefore, wash the hoses or install new ones.
Air pocket in the circuit of the Toyota Previa
The symptom is identical to that of the hoses. If ever air bubbles are inserted in the heart of the circuit, the water will also have problems reaching the radiator of the heating of your Toyota Previa. Therefore, it is only necessary to purge the water circuit.
Conclusion
You now understand where your dysfunction can occur. That said it sometimes happens that the problem comes from another place, such as the air duct of your Toyota Previa blocked, or even a broken tap, however it is still rather rare. Feel free to leave a comment if this article helped you. Enjoy the road!