Medium
LED 2 (C.H.) on Ferroli Arena

Your boiler mistakenly thinks you are running a hot tap because a sensor is stuck, which is preventing your central heating from turning on.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Hot water tap open - D.H.W. flowmeter (136) contact closed.

From this model's manual
Verified against the Ferroli Boiler Optima 601 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.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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