High
BLANK DISPLAY SCREEN on Grant Spira

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.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

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.

From this model's manual
Verified against the Grant Spira installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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