Oscillating Fan Speeds Up And Slows Down

This in on an old window fan.

The fan flats zwift. The row of 4 leds that show the fans speed and the other. It runs at full speed for a little then slows way down then speeds up again this repeat constantly without a pattern. The torque to drive the motor of your electric fan comes from the magnetic field induced in the motor coils when electricity.

Gil kloepfer theorizes the reason for this happening is that the 12vdc fan is constantly running with too little current due to a resistor wired in series with the power. A it moves at a regular speed then slows down as if about toturn off then pick up again. A i havent had.

Tower fan homech whole room wind curve auto oscillating tower fan with remote quiet cooling 3 modes 3 speeds up to 12h timer led display with auto screen off floor bladeless fan 48 out of 5 stars 8237 6799 67. I have put oil on the bearing ends on both sides of the motor. The smartmi 2s is an oscillating fan on a pedestal thats also rechargeable and it can be controlled with an app on your phone.

A on low it tends to do this more in the middle. On medium it tends to do it more when it turns to the right and a on high it tends to slow when it turns to the left. When the capacitor burns out the electric current through the coil is too.

A i can pull a button up a to make it stationary but the fan still operates the same. The fan tends to collect a lot of dust and dirt and sometimes when switching to the slow speed it goes so slow that it stops and doesnt have enough umph to start up again. What is causing the motor on an electric fan to slow down and stop.