The normal service life of VILPE roof fans is 15 to 20 years. The motors have a long service life, and they seldom break down prematurely.The most common reason for reduced fan power is breakage of the capacitor. It is quite easy to change the capacitor, but this should be done by an electrician.If increased sound is heard from the rotor at higher speeds, there may be a bearing fault. A maintenance set is available for each fan model. The maintenance set includes the motor and the capacitor.