Worcester Greenstore E41.F31 fault code

What it means

The alarm is activated when the anode in the hot water cylinder is broken or does not work. This alarm occurs only when Protective anode installed is set to Yes.

Source: Worcester Greenstore LECP Installation, Commissioning and Servicing Instructions 6 720 806 768 (2013/02), §21.8 categories + §21.10 alarm functions + §21.13 information log (render-verified)

Can it be reset?

Resets when: The anode should be replaced so as to prevent corrosion in the hot water heater.

Source: Worcester Greenstore LECP Installation, Commissioning and Servicing Instructions 6 720 806 768 (2013/02), §21.8 categories + §21.10 alarm functions + §21.13 information log (render-verified)

UK models this code applies to

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Now the harder half: proving what caused it

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