No display, boiler working OK Low

Vokera No display, boiler working OK Fault Code

Also written as NODISPLAYBOILERWORKINGOK — same fault.

The Vokera No display, boiler working OK fault code means: your boiler is continuing to provide heating and hot water as normal, but the digital screen has gone blank.. It appears on 1 Vokera model 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: Fault Finding Test 1A
Typical repair cost £120-200 (including labour)

Engineer required

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

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Vokera models that show the No display, boiler working OK fault code

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

Source

Vokera No display, boiler working OK fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.

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