Medium
LED 2: 1 on Ferroli Optima 201

Your boiler thinks a hot water tap is turned on even when all taps are closed, which may prevent your central heating from working.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Technical description

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

DIY fix possible

Check all hot water taps in the house are fully closedEnsure there are no dripping taps or leaking hot water pipesTurn the boiler power off and back on again to reset the sensor

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Related fault codes

LED 1View →LED 3View →

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