It's extremely rare to get the opportunity to see vids on these boilers. Keep up the good work

You should have an engineers channel which pays ye, brilliant , as an engineer myself, I think your so genuine in your methods, and it relates to so many others, it’s pure brilliance 🎉🎉

I feel your pain, Ive worked on hundreds of these and never had that but I had ONE where the burner pressure was so low it wouldnt heat a warehouse, spent hours on in only to find the injectors part blocked by condense running over them from the low NOX duct, caused by being constantly cooled by the freezing warehouse where the boiler was located, never seen it since, you live and learn.

Even though you missed the bleeding obvious (I personally have never done that, ever! Honest guv 🤣), it makes that sweet smell of success even sweeter! I even felt it myself 👍🏻

Respect for showing this vid. Keep the vids coming fella....

Well done Ollie it was good to see you used your cool approach to solve the problem. Never let it beat you.❤

Great video mate! Real world fault finding, the good and the bad! keeping it real! Look forward to the next one!! 👍

Great video Ollie your still brilliant in my book very interesting video👍

great video of what we really go through some times, and im glad its not just me who can get carried away and sometimes over think and miss the obvious things 👍

Good on you for not giving up on it! Great video, was so happy when I saw those flames! 😊 Another nice vid!

there is always one job that leads you up the garden path , but you got there great content keep it coming

Great job!

Well done. When you get the end of the job and realize you only had to do a quarter of the work, it's both satisfying and annoying in equal measure. As for flue gas recirculation, the idea, I believe is to reduce to maximum flame temp to reduce NOx production, whereas adding more intake air would lead to reduced efficiency, and possibly higher CO due flame chilling before complete combustion. HTH

Great video, we have all been there, keeping your cool is key to success

Well done for sticking with it . We have all been there mind blowing sometimes

Well done for sticking with it. It's nearly always simpler than you think it is! Regarding the shorting problem we always used to sleeve the leads. Some boilers already have sleeving on the leads.

Well done you fixed it great content iv been there so many times, as a new engineer on my own you've been very helpful

When you asked what it could be at the start I paused it and had a think, I said to myself that main burner could be starving the pilot when it opens up then obviously rectification drops out and closes gas valve couldn’t quite think why I thought shale in the gas valve reminds us to always check the basics 😅

We’ve all been there …lol. 10/10 for telling it as it is ..lol 🙏. Love the vids

Great video & honesty mate 🤛 great boilers really 😉😂looking foward to the next video boss!

I absolutely love your work ethic and your honesty and your videos are brilliant. What a frustrating experience for you though, especially as you were actually right on the problem earlier when you said at one point in the video something along the lines of ‘Maybe when the main gas valve opens its dropping the pilot pressure’ and then when you were advised to swap the gas valves you discovered all the debris in the main line. Hindsight is a great diagnostic tool.😉 Well done and thank you for sharing your experience.😀👍

Another great video. To be honest watching your thought process is the best thing about these videos. We all miss the obvious sometimes. But if you had gone straight to the pilot tube I wouldn't have learnt as much as I did from this. Thank you

Best Gas vids on KZfaq No nonsense just Honest learnt loads of the channel telling others to tune in

Brilliant video, your assumption on the products recirculation tubes is correct the purpose is to reduce Nox and Sox.

Done well there 👏 annoying sometimes yes simple things we forget to check

Do you have any sponsors yet? Hopefully uni lite or someone contacts you cos i think youbwould like the uni lites.. i watched the podcast you did with the 2 lads on there channel (i forget what it was called) but enjoyed it and hopefully your back on again sometime.. keep up the good work oli, love the channel, 100% one of the best on youtube by far!.

Well done... you got there in the end.

Top engineer!

Love seeing you back posting vids mate you’re absolutely the best in the biz! Remember to call for any of your German burner needs 😉😁

Right pain but you got there. Good video

Don't beat yourself up over this one we all miss the obvious from time to time but you got there in the end and that's all that matters👍

Great video👍🏻 That would be so frustrating. It's a good job I dont have the same technical prowess as you Ollie. I seem to breeze through life because I'm stupid in comparison 😂😂😂

happens to the best of us!

Nice vid. You are a legend and a true GAS man through and through. Learnt loads off you. So why not share some back.. The air recirculation on the boiler does not reduce the oxygen to reduce the flame temperature. There is still enough oxygen for it to not be a concern. It uses air recirculated into the combustion chamber to turn more CO into CO2. Remember incomplete combustion is the enemy: complete combustion is the aim.

The red back boots are a Aussie brand, remember having a pair when working over there. Kept on thinking this seems like flame rectification. Amazing that had a pilot at any time?! I remember one of my hardest fault finding, System would not warm up seem like blocking in pipe work checking zone valves and pumps, Tested boiler. Phoned manufacturer more testing, even had another engineer look over to see if I was missing anything. After many hours I discovered that it had a new main board and whoever had fitted it they hadn’t married the temp knob correctly on to the pcb so even with the temperature turned to max wasn’t hardly turning temp up. Right old head scratcher. But kiss. Cheers Oly.

Had loads of these in havrigg prison. Changed so many burner bars on them I lost count.

Front tubes look like 'spillage tubes' to extinguish flame in event of flue spilling.

Brother, you didn't let the boiler beat ya, man, the satisfaction when it lights up, eh?

Well done mate, I would have been stressing out with that one. Any advice for a domestic guy making the jump to commercial? I've been thinking about it for a while.

Kiss. Love it. Can't blame you for missing it Ollie. How was that pilot even lighting in the first place.. 🤔

I’ve had the same issue with these boilers and it always ended up being a blockage in the pilot tube

You were right. Nox ducts.

Never did an efficiency test on these old Concord boilers. Daren't.

Gloves look decent what make are they?

I feel for you but well done

Copper gas pipes Sulphidation Been caught out also with this before

What area are you based and do you need commercial guys?

Hi Heat Geek, how do you go about charging when you end up going around the houses like this..? I am a fairly new Gas engineer (just in my second year) often the faults are not obvious and I feel bad charging for all my time if it was actually something simple. Just wondered what your thoughts were..?

🤘😎🤘

did you charge for all those parts you didn't need?

Well done 👏🏻 what a twat of a job 😢

60k ohms is so high that it would barely pass any current and therefore have no force to open the valve. 500 sounds more plausible.

Hope they are not to cross :)

Ollie, don’t beat yourself up mate. Your persistence & knowledge leads you to the fault. Fantastic,insightful content & anyone can see why you’re one of Britain’s best Engineers. We’ve all been there mate & most others, including me, would’ve replaced the Gas Valve & still not resolved the issue. Perhaps you could go into a little more detail on that Live Test you touched upon? As with most of your videos; there’s always wee nuggets of gold tips, that are easily missed. Thanks as always for sharing👍 Luv Dick Puller❤