Why does my fan run slowly?
Ceiling fans that operate at speeds slower than normal can have one of four problems. Two of these issues are mechanical: loss of bearing lubrication and poor blade balance. The other two are electrical: either a bad capacitor or damaged winding.
What do I do if my fan speed is low?
Changing the start or run capacitor should only be done with power to the fan disabled. Ceiling fans that operate at speeds slower than normal can have one of four problems. Two of these issues are mechanical: loss of bearing lubrication and poor blade balance.
What causes an electric fan to slow down and stop?
The run capacitor stores charge and delays the current momentarily, which gives the fan rotor time to turn and orient itself so that the induced magnetic force is effective. When the capacitor burns out, the electric current through the coil is too steady to generate torque, and the fan slows down and stops.
What causes an electric motor to turn slow?
Worn brushes are often responsible for a motor that turns slowly, as the contacts break down and current can’t be applied. Pry out the ring clips from the brush holder using a screwdriver and a pair of pliers. They are usually on the back of the electric motor.
What are the symptoms of a failed blower motor resistor?
Blower motor resistor problems. Problems with a blower motor resistor are common in many cars. The most common symptom of a failed blower motor resistor is when the heater fan only runs at high speed and doesn’t work at low speeds.
How is the speed of the blower motor controlled?
The electronic module that controls the speed of the blower motor is called a blower motor control module. In some cars, the blower motor has only 4 or 5 fixed speeds. In this case, the speed of the blower motor is controlled by a blower motor resistor.
The run capacitor stores charge and delays the current momentarily, which gives the fan rotor time to turn and orient itself so that the induced magnetic force is effective. When the capacitor burns out, the electric current through the coil is too steady to generate torque, and the fan slows down and stops.
Why is my AC blower running very slow?
If the bearings are dry, then you need a new blower motor. (unusual) Since you have a heat pump, if it is a higher performance model it may have an electronic blower speed control that is supposed to automatically slow the blower when it is very cold outside to ensure an adequate warm air temp inside.
Worn brushes are often responsible for a motor that turns slowly, as the contacts break down and current can’t be applied. Pry out the ring clips from the brush holder using a screwdriver and a pair of pliers. They are usually on the back of the electric motor.
How does a different fan speed switch work?
Those of us that have a discrete number of fan speeds have a set of resistors whereby the fan speed switch selects a different resistor and thus a different fan speed.