How to Repressurise a Heating System with an Internal Filling Key | Worcester Bosch

This video shows you how to repressurise your heating system using your Greenstar gas boiler's internal filling key.
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[@tikkj]

I'm a student stuck in a freezing cold house with my landlord on holiday. I assumed pressurizing a boiler would be way more difficult than this - I looked this up almost on a whim. A minute after watching this video, my radiators are now hot again. Like some sort of black magic. Thank you :).

[@jnlawrence3337]

Had to use this video again (once a year ?) A real pleasure, it is so clear and everything is just right, the speed the voice....and the smile. Thank you.

[@davidtanycoed]

lol same here - saved it in my youtube favourites. Just checked mine and pressure was on zero, must of been ages since I last checked. Great invaluable video even 9 years on.

[@vickimunday443]

I watch this video every time I need to repressurise my system. I never manage to push the key far enough first time and get a wet arm, but that's my fault, not the video's! Thank you for these easy to follow instructions - I'd be stuck without them!

[@casbyness]

As someone who can barely operate a stapler, and for whom the user manual might as well have been written in ancient Sumerian, your video enabled me to fix the issue with my boiler and get my hot water working properly again. Extremely clear and concise on all levels. Thnaks so much!

[@s.aura.h8084]

Single woman living on my own. Bank holiday weekend with no water, not able to contact lettings agency and plumber not able to come out unless I couldn’t figure it out and this video has done the trick! Very simple, very easy, not daunting at all. I ran the tap after to make sure it got hot again and it did! Thank you!

[@allaroundthemetaverse-nftg725]

Man you literally saved my life, rented a new house went to take a bath and the water wasn't hot. Searched everywhere and finally found this video and it worked, thank you so much!!!

[@bassfixer]

Do you know what "literally" means?!

[@willmorris12345]

@@bassfixer 😂

[@stevehadgraft]

A

[@phillseen4501]

Soak that smelly bum i did aswell soothe

[@sandimcdowall8711]

Had been searching the manual on how to repressurise our boiler, it stated we need to call out an engineer, was quoted £150 plus VAT so I turned to trusty KZbin for help. This video explained the exact procedure we needed, rectified the problem in 2 minutes, Excellent! You have saved us a lot of money and waiting around for an Engineer just to turn a key and a nut. Thank you from the bottom of our hearts. I'm saving this video for future reference.

[@markhellyer3407]

BG charge my M.I.L £100 to spend 2 minutes doing this every year, when the pressure only drops a fraction below 1.5b. Thanks to this video, I've been able to stop her worrying about tiny pressure drops, and set the pressure myself, so from now on I can keep an eye on it, and she does not get ripped off. Thanks.

[@MrTomr316]

Thank you - brilliant video. Straight to the point, no back story or other nonsense just telling us how to do it. Thank you

[@stuartgreen9318]

What a star. Thank God for people like you who know what they are on about and take the time and effort to create a short video to help people out. Thanks, mate!!!

[@TheRadFactor]

This video was published 9 years ago. Probably you have retired by now or you changed job to be an Uber driver. But you just saved my day today. For that, thank you.

[@WorcesterBoschHeating]

Happy to hear it helped 😁 - Aiden

[@WorcesterBoschHeating]

@@chaosflower4892 Hello, www.worcester-bosch.co.uk/support/customer-support If you get in contact with us we might be able to send another to you by post 😁 - Aiden

[@mrbigglesworth_Official]

Lol. Same

[@TheKRU251]

Perfect. Just sorted a mates system using your clear and precise instructions. What a star. Everyday's a school day. He has heat again 😊

[@coldkaozgaming3530]

Legend. Had issues with the key being tight and assuming it had gone the full distance then leaking when turning the spindle. But eventually got there. Perfect video mate, modern day super hero.

[@xavierayeboah6917]

Thanks for leaving this comment. I had the same issue and almost gave up and called a professional.

[@saroopraja9271]

Hero! This happened to me and I half flooded the kitchen!

[@jennyramsey7837]

Me too. Water all over work top. Turns out I didn't push key in far enough to seal. Was afraid to try again in case I flooded kitchen. Had another go, success! So happy I've done it now. Video is great.

[@karli1111]

Finding this comment now. My key was a bugger to get in but i eventually did it with alot of wriggling and curse world's. I had to use a penny to turn the spindle as the previous person who did it tightened it up so much it wouldn't move! 🙌🏽

[@traceyb4560]

Thank you. This really helped me

[@DB-kb5qb]

This was my exact boiler and my exact problem. Followed the instructions, and all working again, hot water and radiators. Thank you for the clear, well presented and effective video. keep up the good work. Saved me a plumber call out. Cheers

[@satishverma1636]

Am with home gas, the engineer was supposed to be here by 6pm. He called and said won't be coming till after6pm,than called to say won't be here until 10pm or even 11pm. My daughter saw your video and managed to fix. Thankyou very much for sharing this video.

[@StRoRo]

Just moved in to a house with this exact boiler. The needle was right between the red and green at the bottom end and thought to top it up before it becomes an issue. These instructions were perfect, thank you.

[@ayookojie9948]

Thank you so much for posting this. Sitting up in my cold attic at midnight with 4 guests about to arrive - wondering how to sort it out. Now all done and going to bed cosy - thanks so much !!

[@boejiden.1445]

just a side note. I bought a electric radiator for my attic , would be able to spend winter peacefully without it! It was a out £70 from Argos of b&q WELL WORTH IT.

[@Telthecelt]

It’s so saying isn’t it😀?

[@The_Original_KL]

Genius video. I just did this after loss of heating and the heat the system is pumping out now is incredible. Cheers.

[@kevincrabb5105]

This video is a life saver! Arrived at my caravan to find no pressure. Tried to re pressurise the system but had boiler switch turned on so just got water dripping out. Thanks to the very clear simple instructions including turn the boiler switch off before using key I was able to get pressure back to 1.5

[@chrisbrown6168]

Absolute lifesaver. The mrs was giving me grief because I bled the radiator and it dropped the pressure. Good job I found this video

[@tracyclegg3320]

This was such a clear, concise explanation and has meant that my Hubby and I have been able to sort our heating without paying for an engineer! Thank you soooo much Mr Worcester Engineer, great job! 👏🏻

[@el-gn7vp]

Many thanks!!! Clear, concise, easy to follow instruction. Wish all 'How to videos' were like this.

[@fillosoficall]

Cheers mate! Been without heating or hot water for nearly a fortnight, was ruddy freezing, came across this little tutorial, now everything working excellent, I had one quote wanted £365! I'm on disability benefit and no way I could afford it. Again, thank you.

[@WorcesterBoschHeating]

Glad we could help! In future, if you have any issues with your boiler, you can give our Technical Helpline a call on 0330 123 3366. Many thanks, Worcester

[@matthewjames1179]

Many thanks, this worked a treat. For those of you about to try this, here's a quick tip: If the knob you turn to let cold water into the boiler doesn't seem to do anything, you may find that you need to take it off, then use pliers to turn it. This happened to me as the white knob in the video, which lets water in, was worn and didn't turn the actual shaft. So we took it off then used pliers. Job done.

[@shogunkarate7407]

When I did mine, turning the key water came out and it did not work! SoI turned the key back to lock and opend the white nob. Waited for about 30sec then turned the nob off and the key to unlock. Then turned the key to open , and it worked.

[@angelawoodhouse8361]

I live on my own and just increased my pressure on the boiler. Thank you so much for this video ten out of ten.

[@andreiameleiro]

Same for me!

[@sharonmcardle6199]

and me yipee

[@dazzlingdaz187]

And me. Saved me a call out charge and shivering in the Winter!

[@LFOVCF]

Thank you for such a simple, well demonstrated procedure. It was exactly as you said. Who ever put the thumbs down must be unable to tie their own shoes.

[@killer2434]

To be fair, he doesn’t incorrectly say turn the nut anti-clockwise, when it is in fact clockwise

[@c0mbat15]

If only all manufactures made clear and concise videos like this. The only thing I would like to have known is a) what benefits will this have and b) will this stop the very small leak that I discovered this morning that led me to realise that I needed to increase the pressure?

[@jacksprat3100]

I really got to commend that engineer for explaining everything in detail in a simplified manner. wish they were all like him... ten out of ten

[@martnal]

That was very helpful. I've mislaid my instructions, and I couldn't remember how I've done it in previous years. You missed the most difficult bit which is replacing the flap underneath. It takes me hours to get it back every year.

[@oliver556]

I just leave the stupid thing off

[@cubemb]

Very useful video. Clear, well narrated and easy to follow. Put my mind at ease with what I thought was going to be something much trickier than it actually was! Thank you

[@yipyoppa1]

Did this wrong once and almost flooded my kitchen. Made sure to check how to do it properly this time. Thank you, pressure now back to 1.5. Very clear and useful video.

[@ldalby4510]

Massive thank you to Natalie at customer support. She fixed it down the phone. So relieved. Big thank you.

[@fatmanpauluk]

Excellent video. It's so simple to follow. You've just saved me a £65 bill for 5 minutes work; and no doubt more as a plumber would have found something else wrong no doubt!

[@richardbird5061]

Excellent instructions. Previously I had been confused by the apparent lack of filling connections in my system. This video explained clearly how filling this type of boiler was possible without the conventional set-up. Worked a treat. Other should note that inserting the key may require a firm hand.

[@vivavaldez87]

Saved me between £72-£96 for being basically a pleb who doesn't understand this stuff and almost called out a heating engineer. "Liked" the video, thank you for posting this awesome information!

[@proust5050]

Sorted my problem immediately. Very clear instructions, accurate camera work and no stupid 'music' !All videos should be made like this!

[@tomidi432]

Why is my boiler spilling out loads of water when i do this

[@dtcarthy]

Massive thank you for this video, after removing and reattaching a radiator to decorate i couldn't work out why our hot water had stopped. This video solved the problem immieditely. Thank you!

[@lindseyhopley434]

Thank you thank you, thank you. You've empowered me. I've managed to fix the boiler after my builder left the system with no pressure in and went on holiday!

[@mikey2363]

Did he ever come back off holiday Lindsey?

[@paulsheppard5791]

Just repressurised the boiler which I'd put off because I thought it would be complicated. However what a superb video, easy to follow, no jargon completed in 5 minutes Well done Worcester Bosch.

[@davidnicholls6497]

Excellent instructional video. My key was difficult to insert into the hole, quick touch of fairy liquid on the 'O' rings help to ease it in. You do need to make sure that it is fully seated before you turn to the lock position. If not it will drip water, when you turn the white fill knob on.

[@sianr5714]

Thank you for this comment, I was ready to give up after 3 attempts but after reading your comment I tried the fairy liquid and got the key in all the way!

[@graces550]

Absolutely brilliant straight to the point very professional 5 star rating

[@Stephenesque]

Thank you for this. As the needle on the pressure gauge has been creeping slowly down I've been needlessly fretting about how much it was going to cost to fix. I watched this video and fixed it myself, for free, in two minutes :)

[@abusadat6507]

Thank you Worcester. I had a builder in the flat and he didn't have a clue. Come from work and in minutes of watching the video we have hot water and heating. Thank you

[@shaunwebb7]

After bleeding my radiator, my pressure had dropped to 0. After finding this video the pressure is now back to the correct pressure. Nice, clear instructions, thank you

[@killbill71]

Great video, thanks. Very clear, concise instructions. My boiler pressure had dropped after bleeding a radiator, so this video was very helpful. On first attempt I had water coming out through the keyhole, but after checking back here realised that I hadn't pushed the key up far enough. It was simple from then on, and I now know exactly what to do next time. Thanks :)

[@isakisak7310]

Excellent video thanks. Saved me a lot of stress. One thing I would like to add is that getting the key to push in and fit properly can be quite difficult to get right. I had lots of attempts and nearly damaged the plastic key which can easily be done. And once damaged you’re in big trouble. So one top tip is to leave the key in and leave it there in position for next time you need to top up. Its what I do and saves me a lot of hassle.

[@carlalondon3943]

Pressure on Boiler went to Zero just googled this and this was the first video , followed instructions exactly as he says and just saved my self time waiting on an engineer . Great video thanks

[@tanlan9212]

Thank you!! It's -2 outside, and it's after midnight. Life saver. Also, very thankful for the note on the actual boiler that this channel exists. Saved a little money. Thank you

[@FranticGamer117]

great video, boiler refilled in two minutes. The key needed some effort to push all the way in as brand new, won't turn until it's in all the way. once in, it turned very easily. So if you're struggling, don't try to turn it harder, try pushing it in further.

[@remaincalm2]

Your advice saved me from snapping the key as it wouldn't turn. The choice was risk it and snap the key, or let the family freeze tonight! That extra push in did the trick (using a touch of washing up liquid on the rubber seals on the key). Thank you.

[@markg-qq1kx]

thanks for your video I always forget how to do this. one tip that helped me is the rubber washers prevent key going in easily I used washing up liquid and worked like a dream. cheers

[@remaincalm2]

Great advice about using a touch of washing up liquid, thank you! I also wiped a dab on the edges of the plastic tray as it wasn't going back into the slot/runners afterwards. I'll be dabbing it on everything that gets stuck now! LOL!

[@sionjones4807]

I had no heating for days and it’s very cold and I had to wait 2 weeks for someone to come out and I seen this guy helped me so much I didn’t need the guy to come out now thank you

[@thomasmaher185]

Thank you for this video, I had been over an hour trying,did not realise there was a padlock mark till this video.Brilliantly clear instructions.

[@InstantKarma1970]

If you find yourself frustrated polite word unable to put the key into the socket underneath-black plastic manifold- use some WD 40 on end of key- ease key into manifold-mine would NOT go in - alighned it the lot- sprayed WD 40 on it- straight in- think of it as foreplay :D-good luck campers

[@Steve-alb21]

Spot on!could never get key in straightaway,WD40,sorted, thanks

[@DoodlesMusic]

Tap water does the trick, too.

[@dh96wbtfa]

What a well-made, informative and well-pitched video! If you can produce such comprehensively good material here (which nobody HAS to make at all, let's face it), this bodes well for your boilers! :)

[@justlife6878]

I've watched so many videos and you are the only one so far who advices what to do when the needle go above the 2 mark! Someone repressured my boiler a few days ago as it was on 0, he set it at 2 but now it gradually keeps going up and is on 2.5. Guess I'm gonna go bleed some radiators, thanks a lot.

[@williamstewart208]

So simple....I’ve just fitted a new rad, but I was concerned about boiler pressure....your short has done the trick, many thanks, it’s good folk like you that makes life easier for the those less informed.😁

[@smaddison9552]

This man has just saved my no hot water winging ass life. THANK YOU

[@carpergolfergaz29]

cracking video saved me hours of waiting in for a plumber only thing I say make sure key pushed right up 👍👍👍👍👍👍😀😀😀😀😀

[@cazh8]

Thought I’d have a look on KZbin before I called out BG & it worked. Noticed tonight heating wasn’t going on & the red reset button flashing. All working now, but why would the pressure drop? Plus boiler making a funny noise. I have HomeCare so will call BG in morning, I’m sure our service is due soon too. Fantastic video & straightforward at least have some heating now 😊 Thanks again

[@neil03152]

Can I just say how absolutely helpful this is. I had abject fear of doing this task but was forced to as the pressure was so low. Well you explained everything so easily. I was never told by BGas about the open and closed lock position etc and the instruction booklet was worse than useless. Well to cut a long story short I did it all perfectly in less than 5 minutes so well done me!!! Had to force the cover of though to get to the key!!!! Thank you again, I am so happy now.

[@RoryJoe]

Great video, thank you so much. Bloody hell that key was stiff though. When you think it's in enough... it's not! Had to push it in further, and it was a nightmare getting it out too, thought I was going to do some damage pulling it out. Saved a callout though, so thank you.

[@leefletcher479]

Rory Joe found the same problem when I tried it, but worked out in the end😄

[@vanessagt6021]

Thank you for explaining this so clearly. You are a real life hero ❤️

[@sabine7864]

Our heating wasn't working this morning, on the boiler it stated pressure is too low and our boiler has recently been installed so haven't had the need to repressurise it (and couldn't remember engineer's instructions either lol). It has a key thankfully but we don't have the pressure dial like yours though, despite that the technique still worked. I had alot of water coming out compared to yours so I started panicking a little. I then I switched boiler back on and it started building up the pressure. So thank you and really appreciate the video 🙏🏻

[@lucyhannay5352]

This man is a life saver

[@leostarbaby]

On the coldest night of the year, I think you've just saved my life!

[@mark0016]

Brilliant video. Simple and clear - hugely helpful. Thank you.

[@redsetter4377]

I don't know what I'd do without you each year. I never remember with easy to turn things. Thanks again🌹

[@a.ceridwengwillim2171]

What a God send! Thank you. Boiler was giving me grieve late this evening, causing me to be anxious and not sleep. Thanks to this video, dealt with problem within moments of finding the video and now can sleep soundly...thank you again

[@Keke1980s]

THANK YOU !! YOU SAVED US IN THIS -4 Degree WEATHER ❤️

[@alannafoley9344]

My pressure isnt going up what should i do ?

[@OldProgers]

This video saved pur holiday! Visited the caravan for Easter and the boiler kept indicating an ignition lockout - no hot water. Noticed the pressure was low, followed this incredibly clear guide, and all is good again. Thank you!

[@laurathompson674]

I know it's quite an old video but it made everything simple and easy to do, I've never done this in my entire life so after seeing the pressure gauge get quite low I realised I had to do something so it wasn't to damage the boiler, Thank you worcester!!

[@WorcesterBoschHeating]

Glad you found it useful Laura

[@epeterson6858]

A great video but would you believe I can't get the tray to go back in properly. Any help?

[@geoffbartlett7556]

Prior to using key, hold under cold running tap for a few seconds, this should help to insert/remove.

[@WoodpeckerGreen]

+Geoff Bartlett Thanks, will try that next time. Key was very difficult to insert and remove!

[@thomasclark8559]

Thanks for this tip. Was starting to wonder if I had the wrong sized key or something.

[@matthewclews877]

Geoff Bartlett l.mk.

[@amcluesent]

I also put a squirt of washing-up liquid on the rubber rings

[@tauttechminusmanagedmusic3778]

Washing up liquid, a tiny bit, is good. A small amount of silicon oil is better. Don't buy it unless you have other uses for it. If you have a friend who has Scuba equipment, they almost certainly have some silicon oil for use with O-ring seals.

[@dadaneoncrochet7318]

Absolute hero, after hours of watching crap useless videos of others channels & reading less helpful blogs you saved me in minutes!! Heating & hot water are back again!! 😂✌️

[@Oakleaf700]

Thank you so much! I noticed my millibars were in the red, Chris, our Worcester Bosch heating engineer showed me how to top up the boiler, when he installed it,but I forgot how to do it..these instructions are clear and concise....getting the tray back in was the trickiest part-but it is now in place. Definitely saved me a call out charge. :) PS, have never needed to fill up before, as it was adjusted during the annual service.

[@AM-wi8he]

Thankyou so much! Cannot thank you enough! Heating sorted! God bless..

[@shaun64100]

Big thanks! Followed the destructions and all sorted!

[@anon8853]

Seriously mate, you are a genius. To others, persevere with the key, you will get there. Top man.

[@JohnOShaughnessy]

thanks for posting THIS! My pressure was nearly half a bar, now we're back in business!

[@michaelmaguire4555]

Cheers mate, such clear and simple instructions

[@teddybruckshut3533]

I cannot thank you enough for this!

[@imagineryme]

Very useful video! I love how clearly you say and show what to do, and you saved me having to call someone out for a simple repressurisation!

[@ouijaghost]

i recently had a new water meter fitted under my kitchen sink they had to cut the water supply and i lost my boiler pressure,i watched this video and it does exactly what it says on the tin thanx guys ....nice one

[@inferassessment]

Thanks for this... I was on the verge of calling a plumber!

[@reggiesdad6]

Brilliant, thanks, couldn't of done it without this video 👍

[@debbiealonso747]

Best and clearest KZbin instructions I have ever viewed .Thank you so much .

[@hybridoffate3078]

Very useful video. Straight to the point and shows exactly what he's talking about down to every detail. Use this every time I need to repressure my boiler

[@200Alant]

Why can you not leave the key in place as my engineer after serving the has done . ?

[@iainsaunders6983]

In case it gets knocked and bends the manifold? I imagine that would be a nightmare to fix.

[@michaelacunningham768]

I have tried following these instructions thoroughly making sure the key was turned to the correct padlock symbol etc and ensuring the key is inserted firmly but water comes pouring from the key everytime I attempt this.

[@WorcesterBoschHeating]

Hi Michaela, thanks for your query. If water is coming out from where the key is inserted it means the key was not pushed all the way to form a seal, a little bit of washing up liquid on the end of the key will help it go up further. Please let us know if you have any further questions

[@justinfretwell3012]

That worked for me. thanks very much.

[@davidbaker3786]

That solved the same problem for me. Thanks for the video.

[@lellamor212]

Worcester, Bosch Group thankyou this video and this comment helped so much!

[@902TJ]

Great video. Clear, concise, no jargon and without patronisation, thank you.

[@rmkirfan]

Thank you very much for concise instructions. I got the same boiler and had the same problem, but increased to 2.5bar ,still green area. After watching this video, was peace of mind and dont have to wait for plumbers and saved unnecessary bill.

[@MrPRuddle]

You have saved my life! Thank you :)

[@melissajane9652]

How do I take the key out its blooming stuck!!!!

[@melissajane9652]

Figured it out just after I posted lol thanks

[@smtsoftwaresolutions1966]

I come back to this video everytime our boiler pressure goes down. Thanks for sharing, it's a great help evertime

[@goodyeoman4534]

Just followed this video's instructions and it worked a treat. Wish I'd seen this video before I tried to figure it out on my own (sprayed water all over the worktop). I was fiddling with the dials, not realising that the key thing was attached to the door flap. Thanks.

[@adecaunes]

This video was a massive help however, the engineer forgot to tell us to remember to switch the boiler on again from the mains switch.

[@StepByStepStudio]

Damn I've been sat here in freezing cold wondering why my rads aren't getting warm...

[@taniascammell5730]

Norco coplus electronic 11 litre

[@fscreations7373]

When you are turning the nut, it is clockwise to open and anti clockwise to close. Which is the opposite way he says to do it.

[@tahirsutube]

I have found this is the case too!

[@suddenuprising]

not on the model in my house, which is the greenstar model shown in the video.

[@scad878]

Thank you for this. This helped to calm a very stressful situation where we couldn’t figure out how to sort out no pressure in our boiler on a Sunday evening! 👍🏻😁

[@aaronbailey7890]

1:40 make sure it’s right up in there. Did it a few times and then finally slotted in.. great video thank you 🙏