High
4 on Daikin Altherma Hybrid EHYKOMB33

Your boiler is failing to light the gas even though it is trying to start up.

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

No flame signal. Possible causes: Gas tap is closed, No or incorrect ignition gap, Gas supply pressure is too low or fails, Gas valve or ignition unit is NOT powered.

From this model's manual
Verified against the Daikin Altherma Hybrid Ehykomb33 installation & service manual, page 30.
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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