Emergency
E085 on Vokera Unica MAX System

Your boiler has detected an issue with how the gas is burning, which could lead to unsafe fumes being created.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

What the manual says

Manufacturer manual

Combustion fault / high CO

From this model's manual
Verified against the Vokera Unica Max Combi installation & service manual, page 9.
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 emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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E084View →E091View →E097View →

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