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Hi, When you changed your valve for the V4073A did you switch the wires C and 1 in the Cylinder Stat and run a wire from the grey wire in the wiring centre block to the Hot Water Off position on the Programmer. I just spoke to Honeywell Technical and the adviser said the valve ticking on my...

Hi gents, You were right about the wiring. Having swapped over "C" and "1" on the cylinder stat and running a wire between the grey wire and the HW ON position on the EP3002 the system works again. I basically took the whole wiring system to bits and reassembled it using the wiring diagram...

Hi, Ive jsu had a similar problem. Is your new valve the Honeywell and if so have you swapped around tank stat wire C and 1 and run a wire between the grey wire and HW OFF?

Hi Gents and thanks for the swift replies. Firstly my apologies to Oilman for misleading you but the aerial relates to the TV mounted nearby. The Programmer is hardwired. With regard to the wiring of the valve I believe I have just copied the old wiring into the wiring centre wire for wire...

I have a problem I need to fix so please help. The boiler is an HRM Wallstar burning 28 second RBO. It runs the heating using a room thermostat and Grundfos Selectric circulating pump in the airing cupboard upstairs and a Honeywell Three way motorised valve controlling water for heating/ gravity...