Viessmann · Vitodens 100-W heat-only

471 boiler fault code

Vitodens 100-W type B1GA heat-only

Get a Gas Safe engineer

Free. Enter your postcode.

What 471 means

System pressure sensor not available, lead break or short circuit.

Gas Safe engineer: The code remains or returns after the step above, or no home step applies; arrange diagnosis by a Gas Safe registered engineer.

A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, or someone has possible carbon-monoxide symptoms, leave and call 0800 111 999 from outside.

Renting? Report it to your landlord or housing provider first. They are responsible for gas safety and boiler repairs, and the repair should not cost you.

Safe check

Note the code shown on the display. Do not open, adjust or repeatedly reset the boiler. Contact a Gas Safe registered engineer.

When to contact an engineer

The code remains or returns after the step above, or no home step applies; arrange diagnosis by a Gas Safe registered engineer.

Source and provenance

Vitodens 100-W heat-only type B1GA · 6194585 GB · Fault messages, Cause column, code 471, p. 65
installation and service instructions
03/2023 · document 6194585 GB