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Quite normal as condense is slightly acidic, seems to be worst with aluminium heat exchangers.

How come Tesco's are cheaper than my corner shop then?

:censored: Its also a bet on the gee gees :-)

I am surprised they dont make a bylaw 30 kit for computers :-)

28 btu's? a candle has a higher output I guess you mean 28 Kw's :-)

The Ecotec 843 has an ajustable nominal heat input for heating from 4.5Kw/h to 33.7Kw/h and is capable of delivering almost 18 litres per minute of hot water. you might need to add an external expansion vessel if your system volumn is excessive as the one fitted is only10 litres.

Could be dirt or scale in the seating is it on high (mains) or low (tank) pressure and is the correct seating fitted?

The model number denotes the Kw output for hot water so the 838 gives you a maximum of 38 Kw/h to water which in ideal circumstances would gve you almost 16 litres of hot water per minute at your taps/shower, the heating output however is only 28Kw/h maximum not 38Kw/h as you might expect for...

I see where your coming from Bob, maybe some pipework was altered when the boiler swap took place and 4 months ago he wouldn't have noticed the problem as chances are the heating was being used.

As its your radiators getting warm why would you want to turn off the gate valve to your cylinder coil? When you select HW is the 3 port valve heating pipe getting warm 18" or so from the valve?

Sad thing is many older people believe BG are still a British state owned business but like British Airways they are just part of a multinational private company and yet both carry the Union Flag as part of their livery.

The round sight glass kit Part No 307A251 is listed as obsolete but there is one on ebay for £24.99 its described as new Sight glass Myson Apollo/Thorn Olympic 307A251, hope this helps.

Expensive DIY repair then, 1 x programmer, 2 x zone valves & 1 x PCB, stick to your day job as a little knowledge can be expensive as well as dangerous.

I would think you need a S801201 membrane cover & a new S801191 diaphragm but you might need a new S801199 microswitch if water has damaged it.

If the pilot light is ajusted correctly cherry red would be better, over cooking them will shorten their life expectancy.

Thorn became Potterton Myson & then Baxi Potterton so you could check with them for parts availability. BG were famous for saying parts are no longer available for an appliance but it didn't necessary mean the part you needed weren't just that some parts on it were not, remember their engineers...

Oh your in Cyprus lol

Stelrad quote the btu output at 3095 for their 450 high x 1200 long single panel radiator.

The once setting is also known as all day, comes ON at the first setting goes off on the last setting, eg on at 4am OFF at 10.30pm or whatever you have it set at, so once is more than twice a day. Try setting it to twice a day and change your PM settings to ON @ 4pm OFF@ 4:30pm and Im sure your...

Probably a 40 year old Ideal Concord if you ask me, flue gas temperature of around 250 C compared to 50-60C from a modern condencing boiler, no brainer, change it.