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Does a fan need a resistor?
With a 12V fan you dont need resistor for the fan. Unless its a fan you’re really worried about protecting I’d just “run it”. I’ve had PC fans on some dirty power before. Cheao-o “wall warts”, over-volted sometimes by double their rated voltage.
Which resistor is used in fans?
Blower resistors
Blower resistors are resistors which are used to control the fan speed of automotive blowers.
How can I make my 12V fan run slower?
2 Answers
- Add a potentiometer in series with the power cable. This would allow you to change the speed quite easily.
- control the fan using pwm. This could be with a microcontroller or just a 555 oscillator through a transistor.
- Have a constant current circuit.
How can I reduce the speed of my table fan?
2 Answers. Try rigging up a fan control switch – pretty commonly available at most home centers and hardware stores. With a little minor electrical knowledge, you could rig one one up to a plug and put your fan on it. That’d give you a L/M/H setting, at an additional L/M/H.
What are the symptoms of a bad blower motor resistor?
Blower motor stuck on one speed. A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. Blower motor does not work on certain settings. No air from the vehicle’s vents.
Where is the heater fan resistor located?
The heater blower motor resistor is located underneath the dashboard in the heater/AC compartment. The resistor enables the heater blower motor to change the speed of the fan.
Where is the blower resistor located on a Ford Escape?
It’s located inside the dash, often on the opposite side of the steering wheel or inside the engine compartment on the firewall. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor.
How does a blower motor resistor work?
A blower motor’s speed is adjusted with a blower motor resister. A blower resistor uses resistance to control the speed of the blower motor. In high speed, the resistor is bypassed and power is fed to the motor directly from the switch.