By nDir 
The blower motor is a car’s electric powered fan which provides air towards the traveller chamber. The blower motor resistor regulates the frequency through which the blower motor delivers air. It is an electronic portion which can prevent the electric current from flowing further into blower fan motor. That’s how you can change the speed of the fan too. Higher resistance means the fan will not go faster and vice versa. And the knob determines the direction of it too.
Cost Of The Resistor
Cars have this component installed in them. But what if something goes wrong with your resistor? Well, it is pretty easy to diagnose and replace a bad resistor. These little things cost no more than 10-60 dollars and you can get them replaced by the local mechanic.
Changing The Resistor
Now, these little JAK electronics resistors give immense amount of ease to the passengers. It can get pretty hot or cold in cars. And controlling the air flow towards the seats is important.
But blower motor resistors can stop working too. And here are some ways to recognise so you can change the resistor as soon as possible. It is recommended to take your car to a technician when you notice any abnormality in the air flow so you do not face any major inconveniences later on.
- If the speed of the air does not change when you turn the knob, it means there is something up with the device and it needs a check-up.
- There may be more than one settings for air flow in latest edition cars. If any of the setting stops working or takes time to start up, it is time for a visit to the mechanic.
- And of course, if the air just stops coming completely it may be a sign on something blocking it. Maybe the resistance goes too high for it to completely stop.
These are all signs that determine if a blower motor resistor has gone bad.
Lifetime of A Resistor
You do not have to worry about a resistor going bad either. A blower motor resistor installed in a car usually lives as long as the vehicle itself. These things might be small but they are sturdy enough too. And even if one does have an issue, you can easily get it replaced in no time with professional help.