High
E035 on Vokera Pinnacle Combi

Your boiler has detected that smoke and exhaust gases are not being cleared away safely through the flue pipe, causing it to shut down to prevent a build-up of fumes.

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

BLOCKAGE OBSTRUCTION FLUE GAS LOW POWER

From this model's manual
Verified against the Vokera Pinnacle Combi installation & service manual, page 7.
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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