Bosch F44

Bosch error code F44 indicates: Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: No bidirectional motor rotation F44; drum only turns in one direction during wash tumble, reversing relay stuck..

The primary root cause for Bosch code F44 is: On Bosch washers: Welded contacts or defective coil on motor reversing relay on power control board, or broken track on stator harness..

To resolve error code F44: Inspect motor reversing relays on control board. Measure coil resistance of both reversing relays (nominal ~360–420 Ω). Replace power module if relay is welded. Turn dial to 6 o'clock (down), hold Spin button, rotate to 7 o'clock, release Spin button, turn to 12 o'clock (Off).

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Bosch code F44 persists, the physical component causing On Bosch washers: Welded contacts or defective coil on motor reversing relay on power control board, or broken track on stator harness. must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test 3-Phase Motor Windings / Tacho Generator / Carbon Brushes across Across phase pins U-V, V-W, U-W on motor harness; across tacho pins. Expected nominal reading is 3Ω–6Ω (BLDC phase U-V-W) / 60Ω–180Ω (Tacho coil) / 1.5Ω–3.5Ω (Universal stator). Tolerance: BLDC phase winding values must be strictly balanced within ±0.3Ω. Hand rotation generates 1V–4V AC on tacho..

Standard electrical safety protocol: 1. Disconnect 230V mains power before opening panels. 2. Verify zero voltage at test points. 3. Allow hot water or heating elements to cool below 30°C before handling.