Let's not confuse the air conditioning , heating and ventilation of the Smart Fortwo 3. Heating and air conditioning happen to be devices that reduce or increase the air temperature. The first with the help of heat emitted from the engine block, and the other with a fluid refrigerant . The famous ventilation is all the ducts and systems that will allow the air to arrive inside. The main component is the kicker that emits air into your vehicle. If the air barely comes in, if at all, it is most likely a ventilation problem. We will see in this guide how a ventilation works, in order to better discern the problems and understand the technique to solve them.problem-ventilation-Smart-Fortwo-3

How ventilation works on a Smart Fortwo 3

The ventilation is first used to regenerate the air inside the passenger compartment of the Smart Fortwo 3. For the blower, the latter generally consists of a resistance, a turbine, and a engine. The more the integral resistance of the electrical system is lowered, the faster the turbine runs. By rotating the interuptor in the passenger compartment, the resistance is therefore lowered.

Smart Fortwo 3: frequent ventilation problems

Dirty air ducts

If the ventilation works but little air is coming into the passenger compartment of the Smart Fortwo 3, your air flaps may be blocked. Thanks to a screwdriver flat, do not hesitate to remove the air shutter covers. It is only necessary to look inside if these are obstructed. When this is the case, do not hesitate to dust them, as well as the shutters.

Dirty cabin filter

When you smell fumes and this ventilation is weak, the problem probably comes from the interior filter of the Smart Fortwo 3. It gets blocked and accumulates bacteria with the years. It is still quite common that it is clogged, it serves to filter the air that reaches you. There is no instruction from the manufacturer on when to replace it. We simply advise you to take it apart, check its condition. If the latter is really dirty, it will be necessary to change it.

Resistance of the blower HS

If the Smart Fortwo 3's ventilation control is not working well, or even at all, it is probably due to resistance. The resistance is used to increase the voltage in order to increase the speed of the turbine. A suspicious dysfunction of this ventilation may be linked to a resistance problem. This little electronic chip is complicated to repair. We will have to change it.

HS blower motor

There are two fairly common problems with the kicker. The brushes may be worn out. The more time passes, they will be able to deteriorate and generate false contact. The kicker may turn randomly, or not turn at all. It also happens that the problem stems from bearings of the motor. If the ventilation produces a hissing sound, comparable to rusty mechanics, its bearings may be lacking in lubrication. Please feel free to comment on this guide if your problem is different to help internet users. See you soon!