Siemens RF rdh10 stat.Not knocking off?

[fabio]

Siemens RF rdh10 stat.Not knocking off?Call for heat at the stat fires the boiler,but when stat set at say 17degrees it doesnt knock off??

 

[stevetheplumber]

take it back had loads of faulty ones

 

[123maddog]

I had the misfortune to fit lots of these until they nearlyall started braking down.
If you have a green light on the receiver unit but theboiler is not responding the relay is stuck.
Flick the top left corner and it may start to work but willfail again.
My experience is that when you stop using it over the summerit gets stuck.
I have literally returned them by the bag full, the majoritywent down after the first year.
Fitted these about four years ago and have probably replacedmore than two thirds.