Hi. I have an EPH digital thermostat and have tried to alter its programme (as the previous one didn't suit me) and now I can't get it to work. I have been through the instructions several times but am clearly missing something. It connects to a combi boiler which is ok because the hot water works. Ideally, I want it to be manual so that I can just switch it on when I need it (place is small and well insulated). I used to be able to do this fine, except it wouldn't let me switch heating on after a certain time at night which was no good for me as I am a night owl. This is what I was trying to overcome and it has gone wrong since then. Instructions don't tell me how to do this bit. Can anyone help please?