Low Information
88:1 on Viessmann Vitodens 050-W

Your boiler is simply displaying the temperature in Fahrenheit instead of Celsius due to a settings change.

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

Temperature display in Fahrenheit

What causes this fault?

This happens when the boiler's internal control unit has been adjusted to display temperature units used in the United States rather than the UK standard. It is usually triggered by someone accidentally changing the display settings within the user menu or during a recent service. It does not indicate a mechanical failure or a safety risk to your heating system.

DIY fix possible

Navigate to the main menu on the control panelSelect 'Settings'Change the temperature unit from '°F' back to '°C'

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