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B10BF4B — Rear heater/fresh-air blower - overtemperature
Rear heater/fresh-air blower - overtemperature. The Taycan, Panamera (971), Panamera (972) and Cayenne report this code; below is which control unit sets it on each model and how to read and clear it.
Which models and control units set B10BF4B
How to read and clear B10BF4B
- Plug a standard ENET (Ethernet-to-OBD) cable into your Porsche's OBD port and your Mac or Windows PC.
- Open STEUER14, pick your car and run a fault scan: every control unit is read, and B10BF4B shows with its status, its full description and the freeze frame when the unit stores one.
- Fix the cause first, then clear the fault memory and scan again to check it stays away. Reading and clearing fault codes is free on every control unit.
More about fault memory in the manual →
Download STEUER14 — free fault readingOther codes of the Air Conditioning
| B10BF13 | Rear heater/fresh-air blower - open circuit |
| B10BF16 | Rear heater/fresh-air blower - overvoltage |
| B10BF17 | Rear heater/fresh-air blower - undervoltage |
| B10BF1D | Rear heater/fresh-air blower - overcurrent |
| B10BF29 | Rear heater/fresh-air blower - message implausible |
| B10BF31 | Rear heater/fresh-air blower - no communication |
| B10BF96 | Rear heater/fresh-air blower - faulty |
| B10C004 | Electric auxiliary heater (12V) - fault |
| B10C904 | Servomotor for left door window vent – defective |
| B10C909 | Servomotor for door window left air vent – component fault |
| B10C929 | Servomotor for left door window vent – message implausible |
| B10C931 | Servomotor for left door window vent – no communication |
All 418 codes of this control unit →
Fault names come from the manufacturer's diagnostic data. STEUER14 is independent and not affiliated with Porsche AG. A code tells you what a control unit detected, not always which part failed — check wiring, supply voltage and related codes before replacing parts. STEUER14 shows each fault's full description, status and freeze frame on the car.