CITROEN XM Internet Reference page 27

12 Heater (1) The Electrics, Dashboard and Heater
screws, on the motor. Removing the screws and carefully easing the fan away from the motor body gave
sufficient clearance to free the electronic pack. (Do not try to remove
the fan from the motor shaft). Investigation showed that among many components there are two
transistors, one was found to be open circuit and the other to have a short circuit. The numbers on the
transistors (FW26025A) were not recognised but two MJ15004, 140V, 20A, 200W P .N.P . transistors
were obtained, fitted and the system re-assembled and checked. I think the fan runs slightly slower now
but it is working properly.
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