Hi
Our Bosche WFF2000 tripped our main RCD at the end of a wash (door lock had released) and now is permanently leaking live to earth. I have tried disconnecting the motor with no change so am guessing the issue is eleswhere.
Whilst I'm normally happy to have a go at most things, this seems a little complex without the necessary equipment or going round unplugging everything using trial and error.
Is anyone aware of anything obvious (and relatively simple with just a multi-meter) to check?
My feeling is that is is getting on a bit and needs replacing.
Solution Summary
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This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.
Bosch WFF2000 trips RCD with suspected earth leakage
- The problem
- A Bosch WFF2000 washing machine tripped the main RCD at the end of a wash, after the door lock had released, and then appeared to have a permanent live-to-earth leak. Disconnecting the motor made no difference.
- Likely cause
- An insulation fault within the machine was suspected. The accepted reply referred generally to a possible PCB-related tripping fault, but no specific failed component was confirmed.
- What fixed it
- The accepted advice was that proper fault-finding requires an insulation test meter capable of applying 500V DC. No simple multimeter-only check or specific repair was confirmed in the discussion.
- Checks to try
- Motor disconnected with no change
- RCD trip occurred at end of wash after door lock released
- Parts or tools mentioned
- Multimeter
- Insulation test meter (500V DC)
Safety: Further diagnosis should be carried out by a suitably qualified appliance engineer.
1 Answer
As you say, to troubleshoot a pcb tripping fault you need a proper insulation test meter capable of putting 500 volts (DC) through the machine. The most common causes of a washing machine fusing or tripping the electrics are mentioned here - Washing machine is fusing, or tripping the electrics
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