64 99... Fault 1.1 Combustion air blower
WARNING: This page is about a different car, the 2003 BMW 525i, 2002 BMW 525i, and 2001 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.
Instruction:
Measure voltage on combustion air blower with peripheral box (pin allocation: refer to appropriate information on DIS circuit diagram).
Specified value : 6 V (+/- 1V)
COMBUSTION AIR BLOWER FAULT DESCRIPTION
| Question | Answer | Measure |
|---|---|---|
| Is supply voltage OK? | No | Replace independent parking heater control unit, refer to 64 12 520 REMOVING AND INSTALLING / REPLACING CONTROL UNIT WITH HEAT EXCHANGER (THERMO TOP S) |
| Yes | Yes | Replace combustion air blower, refer to 64 12 530 REMOVING AND INSTALLING / REPLACING COMBUSTION AIR BLOWER (THERMO TOP S) |