Common problems guide

The most common Vokera Synergy problems

The faults most likely to send a Vokera Synergy into lockout — with plain-English causes, what to check first, estimated repair costs and whether you need a Gas Safe engineer.

This model is discontinued. Parts can be harder to source and expensive. If repair costs are mounting, a new A-rated boiler may be the smarter choice.
11 documented codes
6 most common
0 DIY-safe checks
6 engineer needed

The 6 most common faults

01
01 Engineer

Gas supply problem, Gas line requires purging, Reversed polarity, Broken, internal flue joint

Full guide for 01
06
05 Engineer

Appliance is connected to the optional remote control (RC05) and there is a communication problem

Full guide for 05

Call a Gas Safe engineer if…

  • You can smell gas or see signs of a leak
  • The Vokera shows an Emergency or High severity code
  • The boiler keeps locking out after repeated resets
  • You've tried the DIY checks and the fault hasn't cleared
  • There's visible water leaking from the boiler
  • The flame is yellow or orange instead of blue
See the full 11-code list for the Vokera Synergy

Related guides

Boiler losing pressure → No hot water → When to replace → Symptom checker →