Let's not confuse the air conditioning , heating and ventilation of this smart forfour. Heating and air conditioning are systems that can lower or increase the air temperature. The first through the heat produced from the engine block, and the second with a fluid refrigerant . Your ventilation is the set of channels and devices that allow air to enter the passenger compartment. The fundamental component will be kicker which sends the air into your automobile. In the event that the air arrives very little or not at all, it is undoubtedly a problem of ventilation. We will discover in this guide how ventilation works, to be able to better perceive malfunctions and understand the technique to remedy them.
How ventilation works on a smart forfour
Ventilation is used to begin to regenerate the air inside the passenger compartment of this smart forfour. For the blower, it is usually made of a resistor, a turbine, and a motor. The lower the total resistance of the circuit, the faster the turbine runs. By turning the button in the vehicle, the resistance is therefore lowered.
smart forfour: regular ventilation problems
Dirty air ducts
When the ventilation works but very little air arrives in the passenger compartment of this smart forfour, it is conceivable that the air shutters are obstructed. Thanks to a screwdriver flat, you can remove the valves from the air vents. Just check inside if they are blocked. When this is happening you can clean them, but also the shutters.
Dirty cabin filter
When you perceive effluxes and this ventilation is weak, the problem certainly comes from the cabin filter of this smart forfour. The latter is blocked and piled up bacteria with time. It is completely normal that it is dirty, it is there to purify the air that reaches us. There is no recommendation from the manufacturer as to when to replace it. We simply advise you to remove it, check its condition. When the latter is really dirty, it will need to be replaced.
Resistance of the blower HS
When the ventilation control of your smart forfour works poorly, or even not at all, it is certainly due to the resistance. This resistance is used to increase the voltage in order to increase the speed of the turbine. A strange functioning of this ventilation can be linked to a resistance problem. This small electronic chip is complex to repair. You will have to replace it.
HS blower motor
Several rather common malfunctions can be found on the blower. The brushes may be damaged. Over time, these can deteriorate and generate false contact. The fan may spin randomly, or not work at all. It also happens that the problem comes from bearings of the fan motor. When the ventilation makes a sharp noise, such as a rusty mechanism, the bearings may lack lubrication. We invite you to comment on this guide in case your problem is different to help Internet users. Enjoy the road!