New diverter valve. Boiler over heating

trevorbayliss · 2024-11-15T23:26:58+0000

I had my vaillant diverter valve changed today. Ecotec plus.

Heating has been on this evening ok. But when we ran a bath the HW must have switched off. It gives a F20 error code which looks like overheating.

So I think the HW has caused this issue? We have only discovered this at 11pm so need to go to bed. I have messaged the engineer so hope he can come back.

Any idea on why this has happened? The diverter was a genuine brass one

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New diverter valve. Boiler over heating

trevorbayliss

DIYnot Local

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