Hello, our moose (Volvo 850 Kombi, 2.5TDi FWD, AW42 Automatik, Modell 1997, EZ 08.1996 mit Klimaautomatic) only warms with wind, the blower no longer bustes. From Flal to case something fresh… Does anyone have a guide on how to expand and/or test the blower? Thank you!