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Thankyou for the suggestions. I just thought it would be likely the two were linked, rather than have two separate issues occurring coincidentally. It's been running a couple of hours now without any further problems...... watch this space.

Good evening. Myson Economist problem. Just went to turn on our heating and it wouldn't power up. The supply fuse had blown (hadn't tripped any switches) so I replaced that and it fired up and worked again as normal except that there was a humming noise coming from the gas control valve. Gave it...

Good point, but if they do fail I can just drill holes and put vents in. they're pretty easy to buy online. I won't be having an inspection for a while but will post the outcome.

I've just fitted 26 residence 9 windows, some of which have trickle vents. The good news is that the construction of the frames means that it's only the header bar which will fill with cold air, not the entire frame as I originally thought. I did open out one vent to fit a sleeve from front to...

You're right, it's 8,000mm2. I'll get there eventually! Plans were passed back in 2007, but work started in 2008 and was approved by Building Control back then so no concerns on lapsed planning. Recession, illness & Covid all set me back but I'm moving in the right direction again now. Still...

Thanks for your input again. I'll investigate the MVHR units. Looks like a combination of trickle vents (with me retrofitting an internal sleeve made from upvc hollow skirting board) upstairs and passive ventilation downstairs is the best way forward. Can't get enough wall height (because of...

Apparently they are and do. It's up to the installer to fit or have them fitted. FENSA doesn't approve the windows without a proper ventilation system but I won't be going down the FENSA route anyway since I'm not an approved fitter and I will have al my work inspected by Building Control...

It's obvious that the jury is still out on trickle vents, and there are lots of knowledgeable people out there who talk very convincingly about their advantages and disadvantages. It does seem to me rather contradictory though, to insist that on the one hand, new buildings should be airtight and...

Thanks for all your comments and suggestions. I've found this 'Trimfit' sleeving online. It would do the job if I could find it in the UK. You could cut lengths according to your window depths. It's available in America but I haven't seen anything like it at home yet. Another option might be to...

Now that it's compulsory to have some form of passive ventilation (8000mm2 per habitable room) I'm looking at alternatives (trickle vents or drilling a big hole through the wall of every room). I'm fitting Residence 9 windows, and it seems senseless to drill through all 9 chambers, which...

Just wondering what you decided. I'm trying to make a similar choice between Residence 9 and Resurgence.

So I guess there's not really any point in pursuing retro-fit any further Grumpy. Possibly she will need replacing before long but she's running fine now and, even if she's not quite as efficient as younger models (same applies to me), there's life in the old girl yet. You can still buy quite a...

Malcolm didn't mention the lack of a Nox duct, Grumpy, but despite not having one the boiler is functioning fine now. Please can you advise, though, if having one retro-fitted would make a lot of difference to fuel efficiency/emissions from my boiler and if so what sort of money we're talking...

Yes Grumpy, so it appears. Apparently this problem particularly affects Concords though. I wonder if your diagnosis would have been the same as Malcolm's.

Yeah algas. Gerroff me nuts! You know how it is. Gotta keep things close to my chest in case the information falls into the wrong hands. Forum rules innit?;)

Nope! Thankfully, as these are expensive to replace too. Any more suggestions? (I'll divulge in a pm when everyone's given up if you like.) brucek

I've obviously rattled your cage Grumpy eh! Please tell me though... how does the average "unqualified" person like me distinguish the "qualified engineers" who know what they're doing from the "qualified engineers" who don't know what they're doing? Perhaps I'm too simplistic but my route was...

Mmmmm!

Wow £490.00. Thanks for showing it to me though Ian. At that price, not knowing whether or not it might be the valve, it would have been too much of a gamble so I would have probably gone for the new boiler option. Before spending that much I did, however, enquire about replacement solenoids as...

Thanks Ian. (My last reply to Dan was about looking in his magic box!) I really appreciate your advice. I quite understand the safety aspect of the forum rules and didn't want to impinge on them.