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I raise my hand to being utterly clueless here. For example, is my boiler heat only or a system boiler? I have a megaflow with pump up on the landing, so it must be a heat only, right? (Or wrong!) And that's why it has a low output, perhaps. Also I have 14 rads in the house (but they're...

Apols but what's the difference? I naively thought another, later Ideal would bolt straight in. One more silly question: I thought the Ideal Icos HE12 was a 12 KW boiler, so why are folks recommending something much more substantial in output? Thanks everyone for your tolerance!

Thanks for that. Three year warranty, is that right? Isn't that a bit economical these days?

So what would be a decent replacement boiler if it starts misbehaving? Thank you!

Me again. Recently moved. House has Ideal Icos HE12 which, apparently, is pretty naff and unreliable (although working fine at mo). To plan ahead, if it starts popping its PCB, or whatever they do, what type of replacement would folks recommend? Thank you!

Thanks both. After much sploshing and gurgling it's coming back. Thank you!

Pump doesn't seem to operate without boiler kicking in too - unless I'm being very silly. I mean, turn wall thermostat up = nothing at pump. Turn thermostat up and boiler on = pump runs and boiler fires for short while. There has been some gurgles and success - I now have three radiators...

Thanks again. OK, I'll try that. To confirm, I crank the lever over and fire up the boiler again? Then flip it back over to auto after airlock clears, if it does. And is there any mileage in shutting off downstairs TRVs to help give it more oomph upstairs?

Hi and thanks for reply. Not manually opened motorised valves - didn't want to dig myself further into mire! However, the white plastic one in foreground has a manual lever at front which has no markings; another lever on left-hand side, marked A and B and another tiny lever on right, which I...

As mentioned in an earlier thread we've just moved into a nine year old house and I've been draining the brown tar like substance from the heating system (See 'Flush' post a day or so ago). Things were going fine but the filling loop leaked badly from a valve spindle whenever I topped up the...

Thanks all!

Anyone?

Just moved into a nine year old house. It has a pressurised cylinder on landing and Ideal boiler Icos HE12 boiler in kitchen cupboard. Pipework's small bore. Bought a bleed key and tried a couple of rads and this is what's coming out - tarry stuff but no sediment. Is this rust or do some...

Always wondered what they were. All over a village in Lincs where I used to live.

Rubber gloves seconded! Just the dome bit unscrews.

Thanks all.

Thanks both. This must be it! (with red tracer to switch.) So I could wire it in here? All pretty neat wiring, you'll agree...

Hi Andy You mean junction boxes? I have three at the back of the house but I thought a connection inside the garage would be weathertight. They're all on the same circuit. Is the conclusion that there is no wi-fi 'switch' suitable for this installation?

Ah ok, didn't know about these. Just had a look at one of the lights, though, and the 'bulbs' seem part of the lamp, so I guess they're non exchangeable. Some are doubles too, with a bulb facing up and down, so I guess this would be pretty expensive if, in fact, I did manage to swap them. :-(

What is this witchcraft you speak of? Would I have to replace all the external lights?