Low
FH on Ferroli Optimax HE Plus

Your boiler is currently performing an automatic two-minute process to clear air from the system before it fires up.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Air purge function (first 120 seconds)

From this model's manual
Verified against the Ferroli Optimax He Plus 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

Wait 120 seconds for the cycle to finishMonitor the display to see if it automatically switches to a temperature readingIf the code persists after 5 minutes, turn the power off at the fused spur for 30 seconds and turn it back on to reset

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