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Hi David, thanks for asking, controls wiring is not for DIY because you are messing with 230vAC which is dangerous. Please trying find someone who has a certificate of attending a course, shop around there not all expensive maybe pay by instalments. I have seen your installation too many times, (I used to charge £200 to rewire now its £300+) 1st power OFF to remove the cover take lots of fotos which terminal has which colour wire, do the same with any junction boxes, Start with the easiest PUMP wire where does that go? Make a drawing, Cylinder / room stats do the same, Look at my VIDs on wiring a room stat Y / S Plans, have the book or get the APP. Big danger is BLUE neutral wire are they being used with voltage, if so that MUST be rewired, not allowed and dangerous. If the programmer is over 8 years consider 2 channel RF, see my VID. that is easy and will save you money more controllable HW & CH.good luck, George Staszak 😀👍

@@mrcombiBedford I know how and why to cut the power. never mind

@@davidadiwego4608 No problem👍

No please tell us😗

Hi Adam, thanks for that and you are correct too many boiler parts are fitted badly making testing very difficult or even worse difficult to replace, but no one listens to me. What I did was to order new meter leads with very thin probes (BG engineers have them) shop around, shorten the metal probes to 10mm just enough to fit on the PCB connection which is where I did all the testing not on the component, much easier and faster. Hope that helps, may do a video on this.🤩👍

@@mrcombiBedford Thank you - yes it does help and I’ll follow your advice. Btw I came and did your fault finding and wiring courses quite a few years ago when I first started - both very good - I might come and do the fault finding one again sometime as I think I’d get more out of it now I know a bit more. All the best, Adam

@@adamkay60 Hi Adam, I retired from training in September 22, to concentrate on Vids and APPs have a look mrcombi.com

Dear Richard, Thanks you for your custom very glad to help, all the best, George staszak. 😍👍

Hi Met, thanks for asking, yes all are working ready to download, we are still doing updates with new icons to comply with new T&Cs from both stores, please use the link for APPs and books. take care George Staszak Our APPs are all one price £4.99 no vat www.mrcombi.com/apps/ Apple iOS download: apps.apple.com/gb/developer/m... Google Play download: play.google.com/store/search?... BOOKS: www.mrcombi.com/shop/

Cześć Kamil, thanks for the comment glad you liked it, the Krakow video is due next week, please subscribe for notifications, all the best. Jerzy 🤩👍

Hi, thanks for asking, All combies have 2 switches 1 for HW and 1 CH which are NO (normal open) dead, until a tap is turned ON. There are only 2 ways to start ignition 1 sensor (Ohms) the PCB see's a change and starts up, or 2 a switch is activated from NO the NC (normally closed) and the boiler starts up until the tap is turned OFF then back to NO shuts down. I don't understand why you want to connect an ELX heater as it's 3 times more expensive than Gas? You can just unplug the aqua sensor from the PCB and enjoy big bills. If you want at add HW cylinder see my video on add 2 zones to a combi or any boiler. hope the helps, George 🤩👍

Hi again, Smart TRVs are very expensive Amazon £274.00 for 5 heads is completely unnecessary because the payback cost will never happen, EVERY rad needs one, just like Air source / Solar and EVs 👍 Smart controls 100% save money balancing TRVs, Heat loss of the home / lounge 60c flow is the way to save money. Why some people spend 1000's to save what? When I added what I paid into my pension I have to be 117 before I make £1.00 profit. I paid for their big building and bonus. Hope the helps, George 😀👍😤

@@mrcombiBedford okay. lastly one more question. if you have smart thermostat in hallway and radiator, you said it should be fitted with a trv. i was under the impression area with thermostat shouldnt be fitted with trv. otherwise both will compete, and also there is no 'bypass' for the boiler incase other smart trv's are off when the heating might be commanded

@@mohitl1697 Hi Again, no problem, as always every rad needs a TRV if the stat is in the hall a TRV must still be there, in a ROOM not allowed both. Ignore what is in the boiler has fitted, as I say many times the rules and Codes of Practice and CONTROLS firms demand an external auto by pass on EVERY system. It's the CONTROLS firms demand an external by pass NOT the boiler manufacturer. Installers wrongly keep thinking it's a boiler requirement when it's not. take care, George 🤩👍

Hi, thanks for asking, the X100 or Fernox F1 are very good inhibitors I highly recommend refilling with them if the system has been correctly. If not X200 or F2 are a more for problem solving, eg. noise or blockages pump problems which is often the case. Hope that helps, George 🤩

Hi, Jaffa, we all live and learn, thanks for the comment, George 🤩

Hi 33, thanks for asking, over because we have to have a HIGH resistance to stop fuses blowing, 100 Ohms is the standard value that we work to. It should be O.L. (over 1 million) but some firms don't use the PCB the same way. Hope that helps, George 🤩👍

@@mrcombiBedford thankyou

Hi Nick, thanks for comment, because of a shortage of engineers who get richer and richer this will only get worse for customers. No one wants to do this job, shame. all the best, George 😍

Hi Dickie, thanks for asking, Hz is not just used as a radio or TV frequency but it's the best way to measure a pump / fan or anything that moves. I found Vaillant publish lots of data in Hz. A pump can be 2K revs but we can't measure revs. but we can in Hz. which is 100% accurate. Most will use Ohms and volts which is OK but Hz is faster and more accurate . Hope the helps, take care George 🤩👍

Hi Derick, thanks for your comment, take care George 👍

Hi Michael, just going to have lunch, a mid Poz. valve has a gap of about 18mm to the heating side, that only allows 13kw of rads, its recommended only 10kw because the big double K rads at the front of the house will not reach max temp 75C the result will be the boiler stays on much longer and high fuel bills. Remember it's the boiler RETURN stat that switches OFF the boiler. It's better to over size the rads with a LOWER return temp. use my "Heat loss App" and you will amazed at how many rooms have under sized rads 22mm Zone valve can have about 20kw of rads recommended max 18 better to split the system to 2 or more zones to lessen the boiler stress and much cheaper to run. Thanks for asking, Marmite crumpets are go! 🤩👍

Thank you, I wanted a Knighthood should have baked a cake😘

😂

Hi Paul, thank you very much I did not notice the error, take care, George 🤩👍

They will do soon as all the bugs and updates are done next week, take care, George, 😄👌

Hi Martin, thanks for feed back, all the best, George 🤩👍

Thanks for liking, take care, George 🤩

Dear Woffy, Thanks for the kind words, not an expert in that field I would go to Vaillant for advice. Don't like air source or EV's I would never take any advice about heating or cars from a politician. All the best, George 🤩👍

Thanks for the question, the book has a lot more information we always advice have both books and all the APPs. if you are an installer or breakdown engineer. The APP has 21 "How to" chapters the book has flow charts, No ignition and so on. The 2 video APPs are being updated hope to be finished in a couple of weeks, (the icons are amazing) Don't download until done, the other 6 will be next. All the best George Staszak 🤩👍

As I said, don't drink in every house🤩👍

Dear Gixxer, thanks for asking, I cannot show you how to wire a digital stat because each firm has different terminals, you would not change to the same type, 2L +N, all digital. have COM and SW.Live same goes for Open Therm. some will be 230vAC or 24vDC or Volt Free it depends on the one you buy, as in other Vids. if your boiler has O.T. that's the lowest running cost after that VF then 24vDC avoid 230vAC. hope that explains. Our Wiring book and APP has more info. take care, George Staszak 👍

Dear Kuldi, thanks for your comment, all the best, 🤩👍

Hi MD thank you very much for your comment 🤩

Hi Saulis, thanks for asking, I will be making more Vids. this month just Subscribe and click Notifications and enjoy, take care, George 😇👍

Dear Alex, thanks for asking, I will be making more Vids. this month just Subscribe and click Notifications and enjoy, take care, George

Dear Gas NW, Thanks for asking, yes you are correct the old stat MUST be disconnected, I understand they don't want to remove the old one before decorating. Power OFF and remove the wires from the boiler end and make safe (don't cut them OFF, someone may want to reconnect them later). Hope that helps, George Staszak 🤩👍

@@mrcombiBedford Hi George. Many thanks for the information. Its an old heat only boiler so will I need to put a link back in on the boiler end so that the EPH twin channel programmer controls the switch live to the boiler? Thanks

@@gasservenw1369 Glad to help, it's only the feed to the old stat that needs removing at the boiler end as you say.👍

I think I replied earlier, but its the diverter letting by. thanks for asking, George

@@mrcombiBedford Thanks. Do you know if I should be worried, like maybe it's about to fail and I should get looked at or just carry on?

Dear Sajid, thank you very mush for the kind words, take care, George Staszak 🤩👍

Hi John, thanks for your patients the APPs are moving up the system to finale build, I will email all when ready to re load, regards, George staszak

Hi Jez thanks for asking, its the gas valve, after a few years it get out of settings and often does not close promptly thus sues more gas. sometimes it just shuts down, dead. Often it's replaced with a different model same as PCBs, that's why I say after 4 years check the firm for updates. take care, George Staszak 🤩

@@mrcombiBedfordHi George, I’ve literally been noticing this issue with Ideal Combi2 boilers. Mainly with the C24 model which when running gas rate checks seem to be sometimes about 3KW - 4KW overgassed. Maybe they have a gas valve issue with this model as these are relatively new. Also would a faulty PCB cause a higher gas rate?Thanks, Dan.

@@DanielGreen_690 Morning Daniel, not the PCB, 1st. call the firm to report the issue feed back is vital to them and ask for guidance. I think just reset the GV come back after two weeks and retest / replace or it's OK. Many thanks for asking and have others had this common problem? Please leave a comment below, take care, George Staszak 🥰👍

Many thanks for comment, glad to help, take care, George 🤩👍

Dear Colin, thanks for the kind words, never too late, Polski saying, we learn all our lives and die stupid, take care, George Staszak 🤩

@@mrcombiBedford cheers man :)

Hi Richard, that's 2 of us, take care, George 🤩👍

Hi Raymond, thanks for asking, The best place for advice is the boiler firm, officially we add all the water content of the rads, pipe and boiler, good luck. As its commercial which is not my world, I would expect between 20/30 ltr. would do, better over size than under. take care, George Staszak 🤩👍

Thanks for tell me, that is an offer to avoid, that is nearly the price of a boiler, this video came just in time. Take Care George Staszak 🤩👍

Dear Jonny, thank you for the kind comment, all the best, George Staszak 🤩👍

Thank you very much for the lovely comment, all the best George Staszak 😍👍

Dear AR, thanks for asking, I have lots of drawings in other vids APPs and book, that shows what you are asking. The old 230vAC room stat has to have 3 wires, the neutral we don't need in digital stats so we make it safe and use the other two as they are Com and SW.L. Hope that helps, George 👍

@@mrcombiBedford Thank you very much George. I managed to get the thermostat installed using the 2 wires. I am experiencing that under the stairs location problem though. Even in June, the temperature under the stairs is dropping to 18 degrees, causing the heating to turn on. I think I need to configure it for a 2 degree differential so that it only switches the heating on when there is a 2 degrees difference. Thanks again.

Thanks for asking the blue wire is with the black wire that’s wrong All the blue wires should be together and never with others Hope that explains George

Dear Mjido, please translate to English, all the best, George

Dear Met, Thanks for your email, I have retired from training after 20 years to concentrate on RUclips videos, www.youtube.com/@mrcombiBedford/videos where I can reach more installers. Please subscribe to us and watch the Vids. They are made for you. We also have a load of APPs plus 2 book, for you or anyone in the heating industry. If you need “hands on” training then go to the firms, compulsory Baxi, Worcester Bosch, Vaillant plus my favourite is Intergas. For controls Drayton + (RUclips vids) + Honeywell Home. Takes Care George Staszak😍👍 Mr Combi Our APPs are all one price £4.99 no vat www.mrcombi.com/apps/ Apple iOS download: apps.apple.com/gb/developer/m... Google Play download: play.google.com/store/search?... BOOKS: www.mrcombi.com/shop/

@@mrcombiBedford Hi George. Many thanks for getting back to me. I’ve got the apps and have just ordered the books. I will hopefully be attending the manufacturers courses as you have advised once my ACS comes through. Drayton and Honeywell only do online from what I’ve seen. Many thanks

@@IncredibleMet Unfortunately that's the norm, it is very expensive to invite 12+ engineers and feed them etc. and a lots just don't turn up because the cost is too low. One firm told me of the 12 booked 3 came, a lot of food was wasted plus 2 Reps hotel bills. This is why they stopped. Take care, George

@@mrcombiBedford Hi George, I’m having issues with the apps. I’ve emailed the app support email. Would appreciate it if that can get sorted quickly so I can start learning! Many thanks

@@IncredibleMet Dear Met, We are still trying to find which code has been deleted, We have a plan B and I will get in get in touch. Thanks for waiting Sales 👍

Dear Muwafak, thanks for the kind words, glad to help, take care, George Staszak 🤩👍

Dear kr173sh, Thanks for asking, who told you to change the diverter and how did you test it? If the pump runs in HW the stat is still calling, see my videos on HW and Diverter faults and how to test parts. 🤩👍

@@mrcombiBedford the plumber said the micro switch was sticking and to change the valve. It worked for 2 weeks but can to square one.

Very good, excellent, now call him back to fix it, he is very good👍@@kr173sh

​@@mrcombiBedford should the water pump be on when you turn on hot water on the tap? (with the central heating off )

@@aixalexander5257 Hi Aix, I am not understanding your question "water pump" combies do not have water pumps. 🤔

Hi Nikola, Pumps and heating systems must NOT be tested in HW mode only in Heating, because it tests the diverter valve has moved and many boilers do not use the pump in HW. If the heating is OK then the FLOW pipe gets hotter, if not either call a breakdown engineer or factory Tech. Dept. All the best, George Staszak 👍