Very clear and straight forward explanation! Number one on KZfaq!

You make it so easy man I appreciate these videos a lot.

You've just served up the best explained education lesson I've ever come across, been almost 20 years in the education system and have never had anything explained so clearly as this video has done, well done Sir and Thank you so much

love this explanation of what I used to consider as my last port of call during fault analysis... its now my go to - thank you

Great advice. All homeowners should read this (and a few fiiters too lol!). Thank you for de-bunking a central heating electrical system. Cheers!

❤ thank you for taking the time to do this video. Nice slow breakdown

Best video EVER! Well delivered and easy to understand. Good job 👏

Great video that’s the second wiring video of yours iv watched first was on Instagram and I can’t believe how much iv learnt your videos are brilliant so easy to follow and understand, breakdowns will be so much easier now thanks you and keep the great videos coming 10 out of 10

One of best video and best video in the entire KZfaq. Welldone 👏👏👏

You should do some teaching series - excellent, precise and very helpful! Thanks u

Thanks bud, don't really bother with commenting on KZfaq but this is exactly the video I been looking for just the right amount of everything ie: detail for my Brain digest , brilliant start off for me I been doing breakdowns for two years now and I have got pretty good but when it comes to wiring that's my weakness and have to make a educated guess from symptoms or have to call a friend to help me out but this video has helped me alot and put me on the path to strengthen my knowledge , thanks again honesty

That’s a great video very clear and concise thoroughly enjoyed it. Well done 👏👏👏

Absolutely brilliant. Best explanation enjoyed.

Great to see that you have used the earth wire correctly! No using it as a switch wire or not having one in the cable. You might already now.... **The earth wire protects the cable!** If mr/mrs DiYer chopped through or put a nail into one of the cables, if there was no continuity back to the FCU fused connection Unit ( 3 amp fuse) then continuity through the buildings wiring back to the fuse board ( Consumer Unit) there would not be enough fault current to earth (through the earth wire) to blow / trip the fuse / mcb and mr/mrs DIYer would receive a very nasty possibly fatal electric shock. If the installation was protected by a RCD Residual Current Device it would cut the power with in 20/30ms (very fast) and save you from receiving the shock, but older installations do not always have this fitted.

Couldn't agree more with Gary C. Thank you so much

Love this video thank you so much brother

Thanks for explaining everything so well.

Best ever video explained. Thank you

Most exellent sir,thanku

Excellent video mate, thanks

Very good video Thanks, I was struggling but after this video I am ok with it

This clears up alot man! I cant i believe i didnt come across this sooner. Also just a quick question, what wires are at the bottom? Is it fused spur, pump and boiler wiring? And the roomstat?

Great video

Thanks for the video much appreciated one question on room thermostat which number is live and switch live 3 or 1 please let me know thanks

Thank you so much for this video mate. Really helped with fault finding. Btw which brand tester are you using?

You are a Genius and thank you for the BREAKDOWN BIBLE BOOK

Great video, well done.

Great explanation!

Great video. I have an issue I can’t get my head round. The programmer is on and the hot water side powers up as it should as per the times set on the programmer. On the other hand when the central heating is supposed to kick in as per the times set in the programmer ( eg 7am), nothing kicks in. The only way I can get the central heating to turn on and off is by controlling it with the thermostat dial. What do you think the problem might be?

Very well done !

Best video I have seen mate if possible can you try and do one with a serviceplus s17r

brill for revising. thanks

Hi Gary what voltage tester you using mate

I'm a 92+year old motor mechanic with hot water probs on my ST6400CH WITH THE FACEPLATE of ST9400C I HAVE NO HOT WATER TODAY. COMMENT ..i CAN NEARLY UNDERSTAND YOUR EXPLANATION, WHICH I I THINK IS BRILLIANT. i WILL JUST HAVE TO CALL MY CH ENGINEER. BUT THANKS

Very good video.

Brilliant explanation

Like your style 👍

You absolute legend

Hi. I have a oil boiler with pump doing working as a system boiler. What’s the best way to link up a time clock and a stat. Thanks

If the programmer was faulty and you put a link wire between live and hot water I'm guessing that would mean the three port valve would be constantly open in the heating position so customer wouldn't be able to get hw? Because the valve wouldn't be in mid position ever?

All I can say brilliant, most tricks on hw is off ( grey was confuse me alot ) great explanation

Good effort 👍

This is such an amazing video, have you got one for s plan?

My Hwell ST699 programmer doesn't trip on the timer ,but if I turn the spurred switch off/on it trips and runs. It might run the whole time or only 10mins or so [ but trips on if I turn the spur off/on again] Any ideas? Could the internal battery need replacing? Any ideas appreciated before I fork out for a plumber/electrician/new programmer etc

Please can you do video about S plan please

I have a Honeywell controller ST6400C1003 controller box fitted to a 14/19cBi Worcester boiler. The boiler and central heating run only when the controller is by passed is when the black hot water on cable is connected directly to the red hot water off cable, terminals 1 and 4. Anything you can suggest please? I have tried two controller boxes, both could be faulty but unsure how to test them.

I have a Vaillant ecotec 428 with a y plan system.I have 5 wires from the boiler.Live.Neutral and Earth then a black and grey wire which must be switch live and pump live but how do you find out which is which?

thanks for the upload.. is it fair to say that if the programmer for dhw is off, 240v will be present up to the cylinder stat off , thus also 240 at the grey of the 3 port??. Therefore, the only way for for no voltage to the grey on the 3 port is for the programmer to be on for dhw??

Love the channel. SUBSCRIBE & LIKE people. I have a question for you on a y-plan error I gave up on. No 230v to the white wire when calling for hw and ch on sundial wiring center. Programmer was sending 230v to ch on and hw on. I suspected that it might be the wireless room stat (although I did test it). Who knows, they are gonna have tive with it.

I am sure you never came across any faults otherwise you would not keep checking the Live again Earth cable, have you heard of missing Neutral???

Lost

Mate, your credibility just died on the opening frame, you’re using a Whooshitter Botch Mat😂😂😂😂