BLANK DISPLAY SCREEN High

Grant BLANK DISPLAY SCREEN Fault Code

Also written as BLANKDISPLAYSCREEN — same fault.

The Grant BLANK DISPLAY SCREEN fault code means: your boiler has lost all power and is completely unresponsive, meaning it cannot provide any heating or hot water until the electrical connection or internal safety switch is restored.. It appears on 1 Grant model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Boiler will not fire – blank screen. This can be caused by the electrical supply being switched off, a tripped overheat stat, a tripped pellet feed tube stat, the combustion chamber door being open, or a faulty ribbon cable/PCB.
Typical repair cost £150-350 (including labour)

Engineer required

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

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Grant models that show the BLANK DISPLAY SCREEN fault code

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

Source

Grant BLANK DISPLAY SCREEN fault code information on this page is sourced and cross-checked against the official Grant service / installation manuals for each affected model.

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