Vaillant VCW-sine 18 T3W Fault codes & diagnostics

The manual for this boiler has no fault code table.

Combi Natural Gas 1988 Discontinued

GC Number 47-044-01

Download the Vaillant VCW-sine 18 T3W manualThe official installation and service manual (PDF). PDF

No fault code table in its manual

We've read the Vaillant VCW-sine 18 T3W manual we hold, and it has no fault code table, so there are no codes to list. We don't fill the gap with codes from a similar boiler, because the same code can mean something different on another model. The fault code table in the installation manual is the one to trust.