So last night my girlfriend stayed round, (this ain't going where you think it is ;) ) and around 3:30 this morning she wakes up freezing cold so goes to check the heatings still on. She tries the thermostat and nothing happens or clicks, she then here's a loud buzzing type noise from the shed which is where the combi boiler is kept. After waking me and telling me what's happened I rolled over and whent back to sleep as you do. Now I go to check it this morning and nothing from the thermostat again but the actual boiler is on and running, however I looked through the little glass bit to find only one strip alight on one side. The right side was dead and the left side only had the one of say 10 strips alight. Does any one have any clue what could be wrong. It's also running on calor gas. Cheers