Low
H2o on Grant Spira

Your boiler is operating normally and is simply displaying the current temperature of the water inside the system.

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.

What the manual says

Manufacturer manual

Normal control panel display showing water temperature

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.

DIY fix possible

No action is required as this is a standard status notificationConsult your user manual to confirm other status displays

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Avoid the next call-out bill

A cover plan would handle faults like H2o: no call-out fees, no surprise bills.

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