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Hi how about a Horstman C17 as a replacement 4 the switchmaster 300 instead of the H17XL previously advised Thanks in advance lol

Thanks 4 that mate should save me some ear ache of the missis now lol

Could someone please advise me if a Horstman channelplus H17 XL is a suitable digital replacement for the switchmaster 300, Thanks

Thanks for explaining that really appreciate it

Hi thanks for the reply my boiler is a glowworm fuelsaver mkll it has a connection block with the twin and earth and the single live and single neg have a yellow and white wire goin into cable that also has the normal brown live ,blue neg and earth that all go into boiler will this programmer...

Hi I was told I could use a siemens RWB29 as a digital replacment for my old and very noisy switchmaster 300. I followed new diagram and put mains feed (3amp fused) into live I have a twin and earth and a single live and a single neg connection from glowworm boiler down stairs, I put twin and...