Hello all,
I have a Glow Worm 24 hxi boiler, open vented system, 2 honeywell zv's, honeywell room and cyl stats, S-plan wired, with a st699 programmer.
This system works perfect, no problems at all since it was fitted 12 years ago.
However, the HW and CH selection sliders are getting very loose, and just looking ahead at a possible failure of the programmer, and bearing in mind we have never once used the timer facility, is it possible to replace the st699 with a 2 gang light switch for ch and hw?
There are 4 wires at the programmer...L, N, cylstat, roomstat,
If not poss, then its a new programmer at £80 ish.
Thanks and a HNY to all.
I have a Glow Worm 24 hxi boiler, open vented system, 2 honeywell zv's, honeywell room and cyl stats, S-plan wired, with a st699 programmer.
This system works perfect, no problems at all since it was fitted 12 years ago.
However, the HW and CH selection sliders are getting very loose, and just looking ahead at a possible failure of the programmer, and bearing in mind we have never once used the timer facility, is it possible to replace the st699 with a 2 gang light switch for ch and hw?
There are 4 wires at the programmer...L, N, cylstat, roomstat,
If not poss, then its a new programmer at £80 ish.
Thanks and a HNY to all.