Low
P.06 on Vaillant ecoTEC plus System

Your boiler is currently running a 15-minute automatic cycle to clear trapped air out of your heating system pipes.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Purging the heating circuit: The diverter valve is moved to the heating position. The function is activated in the heating circuit for 15 minutes. The pump runs and stops at regular intervals.

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 →

Related guides you might find useful

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →

When to replace your boiler

7 signs repair isn't worth it anymore.

Read →

New boiler cost 2026

Realistic UK prices for a swap.

Read →