Bosch Classixx - Tripping Fault
I've got a Bosch Classixx machine (possibly 10 years old) that is sparking and tripping the fuse box whenever it is turned on. I have been trying to isolate the faulty component and have found that the machine doesn't trip when the front cable harness attached the main programme dial is disconnected. The disconnected wires connect the door interlock and the water valves at the back of the machine. I'm getting a resistance reading from the door interlock though nothing from the valves. However, if I reconnect the aforemention wiring harness while the valves are unplugged,, the machine trips once again.
When tripping, a spark appears to come from the motor and the motor powers up before dying.
Any ideas?
Thank you so much,
Tom
Solution Summary
AI-generated from this discussion
This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.
Bosch Classixx washing machine trips electrics with sparking at motor
- The problem
- A Bosch Classixx washing machine, about 10 years old, was sparking and tripping the fuse box whenever it was turned on. The user found it did not trip with the front cable harness to the main programme dial disconnected, but it tripped again when that harness was reconnected even with the water valves unplugged. A spark was seen from the motor and the motor briefly powered up before stopping.
- Likely cause
- The strongest supported diagnosis was a fault with the motor. The accepted reply said water valves were very unlikely to be the cause, door interlocks can trip electrics, but the motor was the main suspect because sparking was seen there.
- What fixed it
- The accepted advice was that the motor should be isolated specifically by unplugging it, as disconnecting a larger harness does not clearly identify which component is at fault without a wiring diagram. The exact repair was not confirmed in the discussion.
- Checks to try
- Machine did not trip when the front cable harness attached to the main programme dial was disconnected
- Door interlock showed a resistance reading
- Water valves showed no reading
- Machine tripped again when the harness was reconnected even with the valves unplugged
- Spark appeared to come from the motor and the motor briefly ran before dying
Safety: Further diagnosis should be carried out by a suitably qualified appliance engineer.
1 Answer
Hi Tom, read my article which contains help on this problem although there are so many things that could cause a washing machine to fuse or trip the electrics there's only so much advice that can be given. It's very unlikely to be caused by water valves, door interlocks can trip the electrics but the most common causes are other components including the motor and if a spark comes from the motor it has to be the main suspect. The trouble with disconnecting a connector is unless it's a specific one (try just unplugging the motor) you don;t really know exactly what wires and components have been taken out of the circuit without a wiring diagram.
Here's my article on washing machine fusing or tripping the electrics
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