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Overheat cut-out
plug-and-play pre-plumbed DHW cylinder optimised for Ecodan R32 1-phase monobloc units
Supports 2 wired sensors simultaneously
Loft installations require attention to several factors
As a practical guide
Honeywell Home 40003916-003/U Replacement Actuator Powerhead V4073A 3-Port Mid-Position 5-Wire Motorised Valve 60/100 1 Metre Overheat cut-outThe Honeywell Home 40003916 003 U is the genuine replacement powerhead (actuator assembly) for Honeywell V4073A 3 port mid position motorised valves the standard 5 wire valve used in Y plan central heating systems across the UK. When a V4073A head develops a fault humming motor, stuck mid position, failure to open or close, seized manual lever this powerhead replaces the entire electrical and mechanical assembly without removing the valve body from
