I am trying to repair an air filter. The fan just makes a humming sound on any of the three speed settings but does not rotate.
I've measured the 1.5µF motor capacitor (CBB61) and it's around 1.2µF. The tolerance of the capacitor is 5%. Would this be enough to prevent the motor from rotating?
Even if I spin the fan and power on the air filter, the fan still does not rotate.
Could I temporarily add a 470nF Class-X capacitor in parallel with the CBB61 to prove if it is the reduction in capacitance that is preventing the fan from rotating?
I've measured the 1.5µF motor capacitor (CBB61) and it's around 1.2µF. The tolerance of the capacitor is 5%. Would this be enough to prevent the motor from rotating?
Even if I spin the fan and power on the air filter, the fan still does not rotate.
Could I temporarily add a 470nF Class-X capacitor in parallel with the CBB61 to prove if it is the reduction in capacitance that is preventing the fan from rotating?