• Bosch B26FT50SNS Error Code E01 — Motor or motor control unit failure
• Bosch B26FT50SNS Error Code E02 — Motor brushes worn (older models)
• Bosch B26FT50SNS Error Code E03 — Drain hose kinked or pump blocked — not draining
• Bosch B26FT50SNS Error Code E04 — Water overfill — too much water in drum
• Bosch B26FT50SNS Error Code E12 — Limescale buildup on heater element
• Bosch B26FT50SNS Error Code E13 — Water leak detected in base
• Bosch B26FT50SNS Error Code E16 — Water inlet failure — not filling
• Bosch B26FT50SNS Error Code E17 — Water pressure too low
• Bosch B26FT50SNS Error Code E18 — Water inlet valve failure or kink in hose
• Bosch B26FT50SNS Error Code E19 — Heater element failure
• Bosch B26FT50SNS Error Code E22 — Filter blocked — drain pump filter clogged
• Bosch B26FT50SNS Error Code E23 — Drain pump malfunction
• Bosch B26FT50SNS Error Code E24 — Drain hose connection error
• Bosch B26FT50SNS Error Code E25 — Drain pump capacitor failure
• Bosch B26FT50SNS Error Code E27 — Mains power supply issue
• Bosch B26FT50SNS Error Code E35 — Water pressure sensor failure
• Bosch B26FT50SNS Error Code E43 — Door lock triac failure (control board)
• Bosch B26FT50SNS Error Code E44 — Door lock relay failure (control board)
• Bosch B26FT50SNS Error Code E45 — Door lock relay problem