
How a heater works on a Citroen Sm
In winter, heating is essential on the way to work. And when it doesn't work you notice it intensely. In this situation before discovering where the problem comes from, you will need to know how it works on this Citroen Sm, at least the basics. The heating uses the temperature of the engine block to increase the heat of the personalised tour, and very often the cooling system. In this way this system has several functions. In addition, the emission system, so that the air arrives in the cabin also has a double use. There is a ventilateur which emits air when the vehicle is traveling at low speed or is stopped, and it is the speed of your automobile which will send the air as soon as you travel faster. Well designed, right?
Recurring heating problems on a Citroen Sm
Broken thermostat
The idea is easy, assuming that the thermostat which regulates the temperature does not really understand the degree of heat of the cooling circuit, the latter is impacted. Even if the thermostat of this Citroen Sm does not work properly, the heating will work normally. Because the temperature coming from the engine block will increase progressively, and the cooling circuit too, whether it is regulated or not. Our only hassle is that you will have trouble adjusting the temperature.
Air shutters blocked on the Citroen Sm
It is a concern that occurs quite frequently. 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.
Faulty fan on the Citroen Sm
As you can imagine, the fan is effective only at low speed and the engine off. If the heater does not emit too much air at low speed and yet you still discern noise, it is good that the fan is probably running. If all goes well, with a high speed the heating of this Citroen Sm should work. If it happens that the fan does not work at all it will have to be replaced.
Blocked hoses
The clues are pretty simple. In the case where your heating works but does not generate very little hot air, the problem certainly comes from the hoses. These become blocked as time goes by and no longer allow hot water to reach your heating in this Citroen Sm. In this situation, clean the hoses or put new ones.
Air pocket in the Citroen Sm circuit
The syndrome is sometimes identical to that of the hose lines. If air bubbles have ever been stored inside the circuit, high-temperature water will also have problems reaching the radiator of the heating of your Citroen Sm. In this situation, it is necessary to purge the circuit.
Conclusion
You now know where your concern will come from. That said it happens that the reason comes from another place, for example the air duct of this Citroen Sm obstructed, even a broken valve, but it is still rather rare. You can write a comment in case this article served you. Good road !