1E:0 Low

Viessmann 1E:0 Fault Code

Also written as 1E0 — same fault.

The Viessmann 1E:0 fault code means: your boiler is operating normally using natural gas, and this code is simply providing status information rather than signalling a problem.. It appears on 6 Viessmann models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Operation with natural gas

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Viessmann models that show the 1E:0 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Viessmann 1E:0 fault code information on this page is sourced and cross-checked against the official Viessmann service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026