i have a glow worm fuel saver F gas boiler. as far as i know it has been in since the house was built in 1986. it controls the water heating and rad heating. I need a service and cover but don't know if it is a combi (don't think it is though) or another type.It is getting very noisy so am getting a bit concerned..can anyone tell me. We have a control panel in the kitchen that turns it on/off and dials in the house and next to the boiler unit itself (in garage)with temperatures on it. There is also a big tank in the airing cupboard that is connected to it somehow if that helps...sorry if i sound like a spanner, i am a woman and know loads about cooking and fluffy kittens!!