Vokera Aquanova Fault codes & diagnostics

4 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Combi Natural GasLPG 29.2 kW 2008-2015 Discontinued
GC Number 47-094-67

Replaced by: Aquanova LE

This boiler uses LED flash patterns

Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →

Just want the most common Vokera Aquanova faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 4 documented codes

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LED / flash-pattern codes
Flashing red

Your boiler has overheated, causing it to shut down automatically for safety.

High DIY-safe £90-180

What to check first

  1. Check that at least one radiator or bypass valve is fully open
  2. Turn the selector switch to the 'OFF/RESET' position for 10 seconds
  3. Turn the selector switch back to 'ON' and check if the red light stops flashing

Parts commonly replaced

  • High limit thermostat
  • Circulation pump
  • Main heat exchanger
Full explanation for Flashing red
Flashing yellow

Your boiler has detected an issue with the way it is venting or drawing air, which has safely stopped the unit from firing up.

High Engineer only £90-180

Parts commonly replaced

  • Air Pressure Switch
  • Venturi Tube
  • Fan
Full explanation for Flashing yellow
Digital codes
Green LED: Off | Red LED: On

Your boiler has failed to light the gas flame and has shut down as a safety precaution.

High DIY-safe £90-£250

What to check first

  1. Check that your gas supply is turned on and other gas appliances are working
  2. Rotate the control knob to the 'OFF/RESET' position and then back to the 'ON' position
  3. Wait for the boiler to attempt to restart; if the red light remains, a professional is required

Parts commonly replaced

  • Ignition Electrode
  • Flame Sensing Probe
  • Gas Valve
  • Printed Circuit Board (PCB)
Full explanation for Green LED: Off | Red LED: On
Green LED: On | Red LED: Off

Your boiler is working normally and is simply indicating that a hot water tap is currently turned on somewhere in your home.

Low DIY-safe

What to check first

  1. Check that all hot water taps are fully closed
  2. Ensure there are no leaking hot water taps or dripping showers
  3. Monitor the lights; the red light should remain off and the green light will stay on while water is running
Full explanation for Green LED: On | Red LED: Off