High
142 on Viessmann Vitodens 100-W B1GA

Your boiler's internal components are struggling to talk to each other, which has caused the system to stop working for safety.

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

CAN bus communication restriction

From this model's manual
Verified against the Viessmann Vitodens 100 W B1ga installation & service manual, page 56.
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

141View →F0View →F.54View →

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