My Siemens remote thermostat does the opposite to what i set it to. The time i set it to turn the heating on, is actually the time it switches it off, and then the time i set it to turn off, it turns on, and as a result my heating is on all day. I have tried to reset the whole system, but it didn't help. this worked fine before but all of the sudden the heating started to come on at 8 at night instead of switching itself off. anyone have any ideas?

Jojo, September 2013

could be something as simple as the wrong time entered, ive been to loads of houses where the customer has entered PM instead of AM

sinky7062, September 2013