High
F.80 on Viessmann Vitodens 222-F B2TF

Your boiler has detected an electrical fault with one of its internal sensors, which is currently preventing the system from operating correctly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

Normal operation Short circuit, analogue sensor input 2 on ADIO.

From this model's manual
Verified against the Viessmann/Viessmann Vitodens 222 F B2tf installation & service manual, page 93.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

F.81View →F.82View →

All 202 fault codes on the Vitodens 222-F B2TF

Seeing a different code? Every code this model can display, in one place.

A.11A.12A.18A.19A.20F.5F.7F.8F.11F.12F.13F.14F.15F.16F.19F.29F.30F.49F.50F.57F.58F.59F.62F.63F.64F.65F.67F.68F.69F.70F.71F.72F.73F.74F.75F.77F.78F.87F.89F.91F.92F.93F.94F.100F.104F.142F.160F.161F.162F.163F.180F.182F.183F.184F.185F.299F.342F.345F.346F.348F.349F.350F.351F.352F.353F.354F.355F.357F.359F.361F.365F.366F.367F.368F.369F.370F.371F.372F.373F.375F.377F.378F.379F.380F.381F.382F.383F.384F.385F.386F.387F.388F.394F.395F.396F.399F.400F.401F.402F.403F.404F.405F.406F.408F.410F.416F.417F.418F.425F.430F.431F.436F.437F.446F.447F.448F.449F.450F.451F.452F.453F.454F.455F.456F.457F.458F.463F.464F.467F.468F.471F.473F.474F.477F.517F.527F.528F.530F.538F.539F.540F.544F.545F.546F.547F.548F.549F.574F.575F.576F.577F.578F.579F.580F.581F.582F.583F.584F.585F.666F.667F.668F.669F.670F.671F.672F.673F.682F.683F.684F.688F.693F.694F.696F.762F.763F.764F.765F.797F.799F.980F.981F.982I.56I.57I.59I.93P.1P.4P.8S.9S.29S.36S.59S.60S.74S.75S.94S.95S.96S.154

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