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just connected my manometer (non digital, old skool) and with the fan on full blast, it's sucking about 0.5 mbar. The switch is an LGW3A1, which, after some hunting, I found on ebay and a couple of suppliers via Google. It's spec sheet (on Dungs's website) states that it should switch at between...

hmmmm, maybe it wasn't as simple as that! :) Blocking the positive pressure hole prevents the switch from switching in the first place, so the boiler fails to fire. It works fine after it's fired, but not before. Cap removed. Ho hum. The thing that I want to do next is to measure the pressure...

Yep, solid contact, no bounce. Gas pressures have been checked and adjusted. I just tried something else! I may have success! I got the boiler to fire (DHW) and then clamped the tube which runs from the flue elbow to the pressure switch (therefore keeping the pressure switch 'on'). I then...

so, a month on and I'm a lot more clued up about this baby. I realised I was working to the wrong manual - I had the manual for the flomatic and not the RS Turbo. Once I rectified that, I was able to follow the flow charts and circuit diagrams a bit better! :D I ended up doing some continuity...

done, some air rushed out and then some water, at which point I tightened the nut back up. perfect 2.5 litres. With hot tap running on a 'medium' setting (a trickle wasn't sufficient to make the boiler fire), and with the stat on 9 (max), the burners were at high flame and the water...

Just a quick update: My father and I replaced the thermostat this afternoon. I was hoping for a miracle, but unfortunately it's still much the same. Only a shower in the morning will tell for sure :D . One thing I did notice with preliminary testing is that the hot water no longer comes out...

What are you doing on here? Go go go ! Thanks Stu PS, does anyone have ChrisR's phone number? I've emailed, but perhaps he's not an email junky like me :D

Hi there, DP I've never seen the temperature gauge go over 62. This is when I've been 'fiddling' and have turned the DHW thermostat up to its highest setting. When the hot water turns cold (out of the shower or any tap), the temperature gauge doesn't really move that much like I'd expect it...

Thanks for the replies so far. I've contacted ChrisR and will hopefully hear back from him in the next day or so. In the meantime, I have been studying the service manual and watching the boiler carefully. I turned the shower on this evening and had hot water for about 5 minutes. I watched...

I just love the name of that boiler! We've just moved into a flat in Twickenham that has a Vokera installed which is playing up. British Gas came for the annual service and said the boiler is beyond economical repair and it's time to replace it. Forgive me for being sceptical! I have done...