I had a problem with old Randall 102 timer clock which was not working. However the heating did work.Having replaced the clock,paying great attention to wiring it exactly as the old one,am finding that the boiler refuses to come on at all.Please help.

Robert, January 2009

If you changed a 102 for exactly the same clock you shouldnt have had to mess with the wiring as the module just lifts off the backplate and you,so it sounds like you must have got some of the wiring mixed up.

Tony S, January 2009