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I have one of these boilers which started doing this after the system had been cleaned. The problem was sludge and residue clogging the plate heat exchanger. This is an easy fix. Turn off the power and shut off the CH flow and return, also the cold water feed on the manifold. This isolates...

Another useful point. When you drain down the boiler, make sure there is no debris in the pressure relief valve or it will drip on refilling and you will lose pressure.

Make sure of not just the model, but also the serial number as there are several type variations and layouts.

Before I forget, if you are ordering parts, buy a spare diaphragm for the diverter on the right extremity. If you get hot water only if the heating is running, it's a perforated diaphragm. Common to ALL combis. If you get a lockout, especially after crappy weather it is usually a couple of...

Glad to help. Personally, I think it's a good boiler because it's so easy to dismantle. There are known problems but are very easy to fix. Let me know how you get on. I have just fixed the same problem and it's running like new. I just love (not) the "professional" prima donnas who won't help...

Alternatively, it is possible to replace the seeping gland in situ. Shut off the water and the heating valves underneath. You can then drain the boiler by connecting a hose to the drain outlet near the back behind the pressure relief valve which is near the front at the bottom rhs. Turning the...

I have this boiler and just had the same problem. Behind the front panel you will see two microswitch units. Check the bottom one. If it has water or condensation inside this will cause it to keep running regardless. Shut off the power, remove the switch assembly and immerse in meths which will...