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I have a bypass within the boiler (6 year old Vaillant ecoTEC plus 624) and another one (Myson) at the motorised valves' manifold located some distance away with 28mm pipe copper pipe between them. Both bypasses have to be set to 0.2 bar otherwise I get occasional gurgling noises at the furthest radiator and air in the system. Why is this as there's no leaks at any joints? Is 0.2 bar an acceptable/typical setting and should both bypasses be set at the same setting?

My diverter valve has green corrosion on connection points. Doesn't seem yo be any symptoms of failure. Is it worth leaving or worth taking out and cleaning the corrosion off with wire wool?

Super

awesome

On the danfoss LP241 where do you wire the room stat into. Thanks

Thanks, George, interesting and very helpful.

Hi. I’ve got a deep rumble when the combi boiler fires up, boiler still works. Is this the pump making a noise? Glow worm easicom combi. Thanks

are these old thermostats suitable to use in a greenhouse with a tube heater?

The fan slows down can’t remove spent gases, PCB + gas valves has been updated Hope this helps

What kind of things go wrong with the fan that are reasons for rebuild please? And thx for the excellent video😊

6:10 dig the clock. Is that because a lot of your student are backwards? 😂

I would say air. Without air there is no combustion!

Co

CO because it can kill you

What a fantastic video thank you

Great video. Thanks

Hi Mr Combi. Do we manage for low CO? My CO is 125 and O2 is 5.2%. manufacturer “ target” level for O2 is 4.9%. I can raise O2 to the top of manufacturer acceptable “range” of 5.7% and get CO under 100. Do we manage for CO under 100 or keep O2 closer to manufacturer “target” and keep CO at 125. Please help. Thank you

Thank you

I understand not putting it in the hallway opposite the front door but you can install it in another room other than the one you're sitting in IF you make allowances. The 2 places I experimented with on mine were showing a 1C room difference and this was a walk through between 2 rooms that both had their TRV's on max. With people walking past and air fanning it I found the temp and boiler was on/off. I re-sited it in another room a little further away, set the room stat temp down a little and found the temp in the other room was steady. That's the beauty of a wireless one that can be moved around. It's like when people tell you they have their heating on at 17c and are lovely and warm, then you delve into it and realise that it is in the hallway, which IS 17c but the room they are sat in is around 20c, it does take some explaining.

Excellent - 1 Question Pls : after pressurising the expansion vessel and put the heating on within 2 or 3 hours the pressure gauge drops - WHY ? Thank you

just out of interest , how do you see in your side mirrors to drive safely as your side windows are still frozen

Each to their own methods on fault finding but certainly not the way I approach it. Most important aspect for me and first point of call is the end user. A verbal explanation of what the boiler is or isn’t doing. Secondly if possible and safe to do so operate the boiler in each mode, heating or hot water and observe, are they any fault codes been displayed in any modes. Then safely isolate the system from the electrical supply, and remove the cover. Any signs of leaks/water damage, any burn/scorch marks on any component/seals. I would then start fault finding as to the Manufacturers flowchart. Depending on experience you should have a good idea after a visual observation of the operation of the boiler but for me the manufacturers instructions are an essential tool as well.

Hi George I have the same setup with a Worcester i28 Combi boiler With the Honeywell ST9100c and a Drayton Wheel Combi Thermostat. The Drayton is anything but efficient, as you pointed out.(I would estimate its age to be about 10 yr old). I would therefore like to replace it with a digital Wi-Fi thermostat. That I can use with an app to turn it on when I'm on my way home. There's no point in me programming it as I leave home at 05:00 and don't return till 18:00hrs + but invariably I come home to a cold apartment. What thermostat would you recommend for a replacement? I have the three wire system, two Brown wires to L & L2 and one natural. to N the neutral does not carry any power, two earth wires capped to the unit

Thanks

Hello I purchased two books from you but i don't receive the email about wiring you mention in you video

Started off good then made it confusing. Lol

Would a faulty pump sound like an aeroplane taking off ? Noise stops after about a minute, presumably as the water is then getting up to temperature. Happens on both heating and hot water.

What was the point of this video.ring you up and you will come have a look?

And also for an s plan system does the same 1.0 bar /1.4 bar rule follow? as the external expansion vessels sometimes say working pressure 3 bar on them

Hi George. What can be the reasons for an unvented cylinder loosing pressure once every 6 months? drops down to 0.5 bar... top it up to 1.4 bar as you reccomend for a 4 bed... no leaks on the system. and pressure doesnt rise whilst heating is on

Hi Thanks for the kind words all the best, george 🤩👍

Very well explained sir. Thanks

Total dog shite init ??

Thanks for the great content you put on. Just love room 'stats in drafty halls, so true! I think the whole heating situation in UK is a mess. I'm long retired but involved transporting old folk, often younger than me. You often hear them say they put on the heating for a while, then turn it off, then on again later. I often tell them that maybe isn't the best way to go run it. I recently had a call from a lady looking after the home of a 90+ years old who had been rushed to hospital but was returning home after several days away.Did I know how to turn her heating on as the company who fitted were too busy to call? The 90 year old told her she pressed a button near the boiler to switch it on and off, but she couldn't find it. There was a 'hub' near boiler, pressed button and it fired up. After a search I found the programmer/ stat, set to 'manual' , obviously not used , I set temp to 21 c also noted both HW & Heat set to max on boiler, so never condenses I guess. A modern system with good control but she's not getting the benefit from it. I think this is typical of many households particularly of older folks. A couple of years ago I got a phone call from an elderly lady I know who was in tears, she had been without heating for days, every company she tried were too busy to visit. I was reluctant to get involved, but did. She explained her daughter on her last visit a month before bleed her radiators. I repressured her boiler, all was well! Thanks again.

I sent you an email as it wouldnt let me put a link here ☺️

Hvala lepa za nasvete. Boris iz Slovenije

Best hope you dont have a fire

Massive gap at the top of the pitch roof. Warm moist air will be flooding through the downlighters. Putting insulation is mostly a waste of time if you’re going to leave a gab at the bottom and at the top for the air to flow around. I would expect that your going to see condensation forming on the underside of the sarking felt behind the insulation when it get cold, especially if those down lighters are in the kitchen. Make sure you watch the humidity levels up in your loft. You got it right about the gaps at the eves you need cold outside air to flow in and the loft should actually be drafty so that you can feel the air moving about as that helps evaporate any standing water that condenses on surfaces under the dew point.

Hi can you share where we can buy replacement fan parts, it is hard to find them. I have three Baxi Mainfour 240f boilers and all of them needs new fans. Thanks in advance.

great videos

Use wago,s easy for testing

Talking bollocks

Should a carbon monoxide detector be installed inside a ventilated loft if the boiler is up there?

I thought these were lubricated by the water flowing through? I suppose they are 'flooded'? Hence they have a bleed screw. The places you put wd40 and grease in, will have worn. Bronze bushes I would guess? Once the exact smooth fit is lost, the pump is junk. Grease can't save it.

Hi. I have a question or two,, recently had a new boiler fitted, a vaillant (glowerm) with vaillant insides apparently ecotfit 430 And 12ltr expansion vessel.. there approximately 21 rads consisting of mostly doubles , 3 towel rails and 2 aluminium vertical rads, all get hot except 1 aluminium vertical, even with all rads turned completely off and boiler & thermostat turned upto max , this one rad isn't getting as hot as it should , originally a 15/ 60 now a 25 /60 pump fitted and still the same .. I've read that it should have a 18ltr E.V . Also the heating guy originally said that we should have at least a 35 to 40 kw boiler ,but fitted a 30, which he said is OK.. any ideas of what should be done

Is there a name for the inability to identify colours?

Great channel. Very informative but I have to say I am glad I live in a Bungalow with a much simpler boiler system 😊

Wow. 13 rooms is a lot to deal with. Great that you have taken humidity into consideration. Very interesting and thanks for sharing your experience 👍

👍