Bosch WGA2440XME/71 Washing Machine Not Spinning
Customer Question
My Bosch WGA2440XME/71 washing machine fails to spin at the end of the cycle (it hangs on the last minutes and goes straight to "End" with wet clothes, even when tested with an empty drum). At the start of washing, it suddenly spikes the motor speed aggressively. Then it abruptly stops. Next, it briefly spikes the speed for just one second and stops again. This erratic, jerky behavior repeats randomly. The control board or motor inverter seems to completely lose control over the drum rotation.
Tools Required
Hello Huseyn,
First, thank you for reaching out to us all the way from Russia regarding the problem with your Bosch WGA2440XME/71 Washing Machine. With all the problems going on in the world right now, it is genuinely nice to be able to connect across borders over something as practical and universal as fixing a washing machine.
The symptoms you are describing—the aggressive spikes in speed followed by an abrupt stop, and the machine giving up at the end of the cycle with wet clothes—are classic signs of a speed feedback failure. The control board attempts to turn the drum, but because it isn't receiving the correct rotational speed data back from the motor, it immediately aborts the spin to prevent the motor from over-revving and tearing the machine apart.
Since your Bosch WGA2440XME uses a brushless (BLDC EcoSilence) motor, the issue usually boils down to a fault on the motor control board (the inverter) or the motor's internal sensors. Here is how we track this down:
1. Test the BLDC Motor and Harness
Unlike older brushed motors, this brushless motor is driven in three phases.
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Check the Stator Windings: Unplug the machine, disconnect the motor plug, and use a multimeter set to Ohms. Measure the resistance across the three main power terminals on the motor (pin 1 to 2, 2 to 3, and 3 to 1). All three readings should be identical and very low (usually just a few Ohms). If one is open-circuit or vastly different, the motor itself has failed.
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Check the Wiring Harness: Washing machine vibration frequently snaps wires inside their plastic insulation where you can't see the break. Run a continuity test on every single wire from the motor plug all the way up to the control board plug. Pay special attention to the thinner wires for the tachometer/hall sensor, as these are the ones responsible for reporting the speed back to the board.
2. Inspect the Circuit Boards
If the motor phases and the wiring harness are completely intact, the fault is almost certainly on the control board.
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Hunt for Dry Solder Joints: This is an incredibly common cause for intermittent, jerky motor faults. Remove the board from its plastic housing and inspect the solder side under a bright light and a magnifying glass. You are looking for microscopic circular cracks (a dull grey ring) in the solder around the pins of the heaviest components—specifically the relays, large capacitors, and the IGBTs (the chips mounted to the aluminum heatsink that drive the motor).
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Look for Component Failure: Check the component side of the board. Look for any slight bulging on the tops of the cylindrical capacitors. Inspect the motor control circuits for black soot or burn marks. If an IGBT has shorted out, you will often see a physical crack or a blowout hole in the black plastic casing of the chip.
Pull the board, get it under a good light, and resolder any joint that looks even slightly fatigued.
Service Documents
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