Viessmann vitodens 100

clayton · 2026-01-11T17:44:15+0000

My boiler is running even though Nest is not calling for heat, only way to turn it off is via the boiler controls.

CountryFan · 2026-01-11T19:58:54+0000

Stuck motorised valve microswitch or link left inside boiler on initial installation

clayton · 2026-01-11T20:29:30+0000

I did think it might be some sort of frost control but its 6c outside, the boiler is only two years old.

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Viessmann vitodens 100

clayton

CountryFan

clayton

DIYnot Local

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