10.14.1. Features of a design

On the car the heater fan electric motor with excitement from permanent magnets is installed. For obtaining different values of frequency of rotation in a power-supply circuit of the electric motor the additional resistor with three spirals and a safety lock is installed. When passing current through all three spirals the 1st speed of rotation of the fan of a heater, through two spirals – the 2nd speed, through one – the 3rd speed is provided. At turning on of the electric motor without additional resistor the anchor of the electric motor of the fan rotates with the maximum 4th speed.
In case of failure of the electric motor replace it new. The unique repair of the electric motor consists in cleaning of a collector.