Landis & Gyr controller

[nerjaron]

I have an old Landis & Gyr mechanical controller connected to my central heating and hot water systems. A couple of days ago I noticed that the heating remained on continuously, and when I looked at the controller I noticed that the rotating dial was stuck at the number 2 (off) selector and wasn't switching the system off. I rotated the dial beyond the selector and the system worked normally until 24 hours later when the dial again reached the number 2 selector. Is there any way to either repair this, or to disable the faulty selector? I realise that if I disable it, I will have two "on" selectors and only one "off", but this is preferable to the dial being permanently stuck in the "on" position.

 

[doitall]

Why not just fit a new one

What model is it

 

[weareleeds]

More than likely the old clock is on an industry standard backplate so most new clock modules will just fit without any wiring. Undo 2 screws below clock module & take it to local part stockist to see if it will fit

 

[nerjaron]

Many thanks for prompt replies. doitall - My first instinct was to fit a new one, but they seem to be obsolete. Not sure which model it is - hence not sure which digital unit would be compatible.

weareleeds - thanks for the suggestion, I will certainly try it. As there are no screws visible, presumably I need to remove the cover first. Is it just clipped on and can I prise it off with a screwdriver, or is there a better way?
Regards
nerjaron

 

[namsag]

There is 2 little screws underneath at the bottom.... siemens rwb range will go straight on with no need to alter wiring

 

[nerjaron]

namsag - found them. The previous owner had wallpapered over them!!
Many thanks to everyone who responded.
Regards
Nerjaron