Hello, we moved into a rented house a few months ago and it has an old Glow Worm Space Saver Mark II boiler installed (the manual suggests it's a Balanced Flue Boiler with Honeywell Control, GC Number 41 315 88), and a separate timer unit (Horstmann Model 525 Elctronic Programmer). In very yellowed writing on a piece of paper is "to get central heating you must have the hot water in the ON position" - and as this suggests you have to heat the water tank to have any heating. We have two problems with this. The first is that the heating bill is astronomical - I know this is an inefficient, old boiler but we are heating so much water unnecessarily. The second problem is that the water is scalding hot, but without having the boiler setting as it is, the radiators don't become sufficiently warm. Our landlord thinks this is a perfectly normal state of affairs but I think that this model of boiler should be able to be used to independently heat the water and radiators. I have known previous boilers to have faulty valves, and in those cases we could get hot water but no heating, but I have never seen anything like this. Do forum users think that the boiler is genuinely incapable of heating just the radiators (perhaps it's some strange plumbing elsewhere?), or do you think this is a problem that can be fixed with some sensible rewiring or a boiler repair? I need to have a constructive suggestion to take to my landlord because I don't think anything will be done otherwise, and I haven't been able to find anything on the internet about this. Thanks so much for any help or advice you can give, it's appreciated (especially after the latest bill!).:eek:

I've pulled the copper coil out of a HS Tarm Ot35 boiler which is plugged with lime after 20 some years and wondering if muraic acid would eat the obstruction out of the copper? I've tried vinegar that helped a little but didn't get it all. any ideas would be appreiciated thanks: Dave