Hi can anyone help My central heating timing switch (landis & gyr) is
turning off as normal I think The lights are goning out anyway But the
pump Grundos superselectric 15/60 130 bare pump is still continuously
going and the only way I can get it off is the kill the mains power
completelly via the swith next to the timer. Sorry I cant find the
model number for the landis and gyr switch.

Any help would be much appreciated.

Thanks...

drums wrote:
Hi can anyone help My central heating timing switch (landis & gyr) is
turning off as normal I think The lights are goning out anyway But the
pump Grundos superselectric 15/60 130 bare pump is still continuously
going and the only way I can get it off is the kill the mains power
completelly via the swith next to the timer. Sorry I cant find the
model number for the landis and gyr switch.

Any help would be much appreciated.

Thanks...

Sounds like a stuck motorized valve to me..
Normal practice is the switch drives the valve, the valve opens the
water circuit and ONLY WHEN OPEN, a micro switch on the valve switches
on the boiler and pump.

This prevents a failed valve from switching pump and boiler on against a
closed circulation path.

Find your motorised valve, and see if its stuck. Replace bits as necessary.