After a power cut today my heating has stopped working. Have tried switching off but now have no pilot light. The heating is set to come on the timer. There is one switch by the clock that has 3 positions, I have no manuals and wonder where this should be set. When I try to do anything with any of the dials the green light starts to flash orange/red. Typical that it packs up on the coldest night so far!! As a single woman I'm hopeless with anything technical! Does anyone have any ideas what I can try??