Common problems guide

The most common Vokera Linea One problems

The faults most likely to send a Vokera Linea One 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.
30 documented codes
6 most common
2 DIY-safe checks
4 engineer needed

The 6 most common faults

01
40 High DIY-safe

Your boiler has stopped working because the water pressure inside the heating system has dropped too low.

What to try first

Locate the filling loop, which is a flexible silver hose connected to two valves under your boiler.Open both taps on the filling loop slowly to let water into the system until the pressure gauge reads between 1 and 1.5 bar.Close both taps tightly and check the boiler display to see if the error code has cleared.

Est. cost
£80-120
Parts
Filling loop, Pressure relief valve, Expansion vessel
Full guide for 40
02
41 High DIY-safe

Your boiler has stopped working because the water pressure inside the heating system has dropped too low to operate safely.

What to try first

Locate the external filling loop, which is usually a small metal braided hose underneath the boiler.Slowly open the valves on the filling loop to let mains water into the system.Monitor the boiler's pressure gauge until the needle reaches the green zone, typically between 1.0 and 1.5 bar.Firmly close both valves and ensure the hose is disconnected if required by your specific setup.

Est. cost
£80-150
Parts
Filling loop, Pressure relief valve, Pressure sensor
Full guide for 41
03
10 High Engineer

Your boiler has attempted to start but failed to ignite the burner, meaning it cannot produce heat or hot water.

Est. cost
£120-250
Parts
Ignition electrode, Gas valve, Printed Circuit Board (PCB)
Full guide for 10
04
12 High Engineer

Your boiler has failed to ignite the gas burner and is currently trying to restart itself to get your heating or hot water working again.

Est. cost
£120-250
Parts
Ignition electrode, Gas valve, Ignition lead
Full guide for 12
05
13 High Engineer

Your boiler is having trouble communicating with its internal parts due to a poor electrical connection, which means the system cannot safely operate.

Est. cost
£120-250
Parts
Wiring harness, PCB
Full guide for 13
06
14 High Engineer

Your boiler's control panel has lost its connection to internal parts, meaning it cannot communicate correctly to start heating or hot water.

Est. cost
£120-250
Parts
Wiring harness, Main control board
Full guide for 14
Parts most often replaced

on the Vokera Linea One

Filling loopPressure relief valveExpansion vesselPressure sensorIgnition electrodeGas valve

Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.

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 30-code list for the Vokera Linea One

Related guides

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