Just a bit of advice really. Went out to a main eco 30 which had been AR due to a leaky thermistor on the dhw. It had crusted up pretty badly and has slightly rotted the case below the diverter valve. I have fixed the leak and swapped the thermister. Now do I need to leave a notice or just a verbal to the tnt. I can't find any classification for the rotten bit of casing or am I being over cautious. Obviously there is now no leak so ........... Here is a photo.
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