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Thanks Jeff the gas man. Fiddly, but job done. Replaced battery, which cost me less than £1.00.

I switched off CH before going on holiday. When I switched back on there is no display on sunvic programme and buttons are not responding. Tried reset button also but nothing. Checked fuse and its OK. There is also faint glow of light in screen. Was functioning perfectly beforehand. Any ideas? Lolly

Sunvic select xl no display! I switched CH off before going on holiday. When switched back on there is no display and buttons not responding. I have checked fuse and its OK. There is also a faint glow of light on screen showing power. Have also tried reset button. Any ideas. It was perfectly...

Before going on holiday I switched off water and heating. Since coming Bach I cannot get central heating system to switch back on. I have a SUPRIMA HE boiler and a SUNVIC SELECT XL thermostat (which is not showing display). I have checked fuse and it is OK. "On" light is showing on boiler. No...