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I have a Viessmann Vitodens 100-W combi, installed in 2017, with a weather compensation module fitted. I am looking to make some gas economies by reducing the CH flow temp a bit to get the boiler running in condensing mode whenever possible. It is currently set to 32 (the range is 1-35). Can...

Yes, they will be deeper than ours.

Yes, we will expect them to serve a PWA regardless, as the work is within 3m of our walls, but we do not want them to build up to the boundary line because this will affect our outlook and sunlight levels from the rear room even more than the current proposal. I take your point about leaving a...

Our neighbours are proposing a rear single storey infill extension to their property: it's a terrace adjoining ours. The plans show the new side wall of the extension to be set back 6 inches from the property boundary line (our fence). The height will be 3 metres, brick built, flat roof. What is...

F23 is heater failure.

I've got to change the PSU on a Dell Precision Workstation 370. 350W, 24 pin, and the Dell P/N is G4265. Manufactured 2004. I believe the same PSU is also fitted to the Dell Dimension 8400. Can anyone please tell me if this is a a standard ATX PSU, or is it one of the ones that Dell made with...

Thanks, I might give those a try. And about a pound cheaper than TLC.

I have a 6 spot ceiling track fixture in my kitchen that takes 63mm ES screw-in bulbs. It doesn't get much natural light. I changed from conventional R63 spots to CFL's, but found them rather weak, bulky, and the lifespan was disappointing. I then switched to Sylvania 50W Halogen Hi Spot 63's...

Thanks so 26mm -ish-I thought min 1 inch so wasn't far out. That's only about half an inch more than existing carpet, so it's do-able. She's going to have to start saving up though...

Thanks.Last question-based on using 12mm WBP ply and 10mm tiles, roughly how deep would the adhesive bed be? Trying to get an idea of the surface level of the titles. Going to be 22mm plus adhesive, over an inch then?

Thanks, is WBP ply what used to be called marine ply, i.e. water resistant? And could you explain 6mm backers please?

My wife wants the hall carpet replacing with encaustic tiles (house is late Victorian). The area is an L-shape about 3 metres long on each leg. The floor is a suspended one with floorboards, which are in reasonable condition. What base is required under this sort of tiling to allow for...

So would this not be the first thing that the WB engineer would have checked? What I don't understand is that it was originally only at one fan speed? Now he's 'adjusted' it it does it all the time!

My mother had one of these installed in December. I was there when they commissioned it and it seemed OK at the time. I went to visit her again last week and noticed that there was a deep vibration when the fan starts up. This wasn't constant, only a momentary effect at a certain fan speed as it...

In defence of Sime I had an 80E Combi fitted in 1999. It hasn't done too badly, 2 PCB's and a new diverter valve in nearly 10 years, I've known many supposedly reliable brands do a lot worse. The main problem was finding an engineer who knows them and is willing to fix them, now I've got someone...

Update: got the engineer back and he stripped the pump. No debris in it and water running clean. He says one of the bearings is probably starting to fail and has changed the pump (at our expense obviously). He reckons that because it was mounted horizontally behind the old boiler and now...

Thanks, yes that's exactly what it sounds like. So basically this is down to the installers not flushing the pipework thoroughly before refilling the system? I can't believe the pump is starting to fail, as it was completely silent with the old boiler, and the coincidence is just too great.

The noise is continuous, it is present from start up all the time the pump is running. It doesn't sound like bearing failure to me, too light, more like a car engine pinking under load. I should have added that since the boiler change, there has been some air in the system, she has bled the two...

My mother had a new gas condensing conventional boiler fitted in mid-December (Worcester Greenstar), replacing an ancient Baxi. The pump (a Grundfos) was reused from the original system as it appeared to be in good condition and was only about 5 years old. Have just visited her and found that...

Just to update, after removal of AVG (using Avast instead), things do seem to be more stable. Processor is idling at around 28%, but still spikes to 100% very easily, eg when opening a program. But at least the system is usable now. Will leave it for a few days and see how it settles down...