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Hi everyone, I've been trying to solve a short-cycling DHW problem on my Microgenus II 31 MFI (NON HE). I had a spare pump so I changed that first - no difference. I then noticed that the bypass pipe was getting super hot so decided that it was likely that the original 18 year old...

Thanks, that was a great suggestion. There were actually a pair of little recesses around the connection hole, like little cats ears which I didn't notice at first because they were full of crud/scale. I broke the tip off my best electrical screwdriver trying to prise it out using these and...

It's an Ariston Microgenus MFFI 31. As far as I could see there is no lip there to get under - it's flat and flush across the top. Thanks!

Hi, I had something of a boiler nightmare at the weekend. I've noticed occasionally that the DHW was failing to run and the flow switch LED was failing to illuminate and having already changed the clip on part of the flow detection circuit, I bought the replacement flow switch cartridge. This...

Hi, I have to vent our cooker hood through a tile on a pitched roof as the cooker backs on to a wall on the boundary with our neighbour. See pic below - vent will be second row up. The ducting is installed and is 125mm rigid circular totalling about 2.5m. It runs up from the hood into the...

Fair enough. Actually I think I've solved the issue myself. I got up the ladder and shone a torch up the flue and the outer part of the concentric pipe (air in) was full of cobwebs and spiders etc. I have a feather duster on a stick which I trimmed back and used to remove the crud and the...

Hi, My 18 year old Microgenus II 31 is going into E33 when DHW is running with a high flow rate. It is OK with a lower flow rate. Error E33 means "The air pressure switch is closed before the ignition sequence" The observed behaviour is that a hot tap is opened fully and the boiler ignites...

Hi all, Just after a little pointer towards a new tap valve for my elderly mother in law. The hot tap on her bath filler is only capable of a dribble and I suspect it needs a new valve. I've said I'll fix it when I go round on Saturday so I could do with getting the part tomorrow. If it was...

Thanks for the reply Ian. I have an 18mm ring spanner but it's fractionally too big and slips round the head of the cartridge. My old socket set jumped from 17mm to 19mm so I bought a new one to get an 18mm and that feels a little tighter but still slips. I wondered if the head was an imperial...

Hi all, just after a little advice on a DHW flow sensor problem I'm having. I've noticed recently that the kitchen hot tap needs to be turned to approx half of full flow before the boiler ignites and heats the water. I'm certain it used to turn on at a lower flow rate. Additionally, we...

Thanks Foxhole, yes I should have added that it is all clamped tight. There is fraction of a mm play in the slot. My understanding is that plunge cuts are done with router pulled towards me (ie the near edge of the slot) and the final trim cut pushed away from me (ie the far edge of the slot)...

Help! I'm doing the worktops on my kitchen extension and something is wrong with my setup. I've done loads of practices and every one comes out with a gap on the radius of the join. You can see what I mean in these pics ==> 20200406_194655 by Get_Army posted 7 Apr 2020 at 5:05...

Hi, I'm building a kitchen extension. On the existing half of the kitchen there is the original screed which is nice and flat. I've screeded the new half of the kitchen and utility room. I'm generally very happy with the levelness that I've achieved, however there is a small ridge across one...

Thanks Ian, you are quite right. I realised at 2am last night as I unscrewed the cartridge nut that I needn't even have spent 2 hours picking out the remains of the rusty retaining clip, I could just have unscrewed the cartridge and motor in one go! You live and learn I suppose. Given where I...

Hi all, I was hoping for some tips from those who have done this before. Can I also say that I'm only up for DIY on the water side of the system. I don't think any of this will involve the gas side but if it does then rest assured I'll be on the phone for a pro. My boiler died yesterday -...

Thanks 23vc, I'm a screeding virgin! The area is approx 2.5m x 3m bonded running into 2.5m x 1.8m floating. What ratio is the cement slurry mix? I'll do that. Mixer came from a mate but I think I can mix it in situ. Good call re the knee protection - visit to screwfix in the morning! What...

Thanks for the reply. The new extension has 100mm polystyrene under the slab. The garage part is over the existing garage floor and I only have 110mm at the narrowest end (the floor slopes to the front of the garage). BCO seemed happy with 50mm insulation + 60mm screed. I had planned to do 80mm...

Hi, I'm looking for some guidance with a screeding task I have to do in the next couple of days. I'm self-building a corner extension to the side of my kitchen and rear of my garage and also converting the rear 2m of the garage to a utility room. The existing kitchen floor level is around...