
How a heater works on a Toyota I-unit
In the middle of winter it is a definite asset on the road when you go to work. When it does not rotate it is easily noticed. So before you know where the problem comes from, you need to know how it works on the famous Toyota I-unit, at least the basics. The heating uses engine heat to raise the temperature of the personalised tour, and generally the cooling system. Therefore this system has several functions. In a similar way, the emission system, so that the hot air reaches us has a double system. There is a ventilateur which sends hot air when the vehicle is running at low speed or not at all, and it is the speed of the vehicle which will send hot air once you are driving at high speed. Pretty well thought out right?
Recurring heating problems on a Toyota I-unit
Broken thermostat
The idea is easy, assuming that the thermostat that regulates the temperature does not understand the temperature of the cooling circuit well, the latter is impacted. Even if the thermostat of the famous Toyota I-unit still does not work properly, the heating will still work. Because the heat coming from the engine will increase over time, and the water circuit too, whether the thermostat works or not. The only inconvenience is that you will not be able to really set the heat output.
Air shutters blocked on the Toyota I-unit
It's a concern that happens quite often. 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 I-unit
As you will have understood, the fan is useful only at low speed or in neutral. If it happens that this heating system does not send too much air at low speed and that nevertheless you hear nevertheless noise, it is that your fan will probably be broken. If all goes well, thanks to more speed the heating of the famous Toyota I-unit should work. Assuming that the fan does not work at all, it should be replaced.
Blocked hoses
Its signs turn out to be relatively simple. If your heating works but does not heat or very slightly, the problem must probably come from the hoses. These become fouled over time and no longer allow hot water to reach the heating of the famous Toyota I-unit. In this case, remove dirt from the hoses or replace them with new ones.
Air pocket in the Toyota I-unit circuit
The syndrome will be similar to that of the durits. If it happens that air streams are inserted in the circuit, hot water also has difficulty accessing the radiator of the heating of this famous Toyota I-unit. In this case, simply purge the circuit.
Conclusion
You now understand where your concern might come from. However, it may be that the reason comes from elsewhere, such as the air duct of the famous Toyota I-unit clogged, or a defective valve, however it is unfortunately rather rare. Do not hesitate to leave a comment if this text helped you. See you soon !