Worcester Bosch Greenstar 4000 Boiler Installation & Full Review | Heatable 

Hi Alan just been on training at Worcester Normanton , heard you were just over there , like that it's range rated and the self fill filling link, and that they seem to have made the boiler engineer friendly, great video as usual , thanks for all the hard work and time you put I to them,cheers pal

I’ve fitted maybe 30 of these over the last 18 months I personally love them it’s easy to fit with the jig, love the rear piping options even more so now the plate would be easy to remove from the front, plug in Worcester controls another well thought out time saver, user display is really good especially for installer options, prv as you said street elbow and a coupling fits perfectly 👍 easily my favourite to install from the Worcester range

Alan I'm doing boiler service repair the past 25 years and your videos are spot on. 👌 makes you feel more confident when carrying out a service on newer models..quick question I seen you use some liquid to clean condense bottles a while back..what solution did you use.

Best boiler I have ever installed

Great job Allan

Hi Allen, loving your honest approach to reviews etc, was wondering if I could ask some advice - currently have an old Ideal Icos that has died and just about to replace but having problems finding a boiler that seems like it would be powerful enough. Old boiler is an Ideal Icos He36 (37kw) with Oso indirect 250L unvented tank. I wanted to go Viessmann after your review but seems like they only do 32kw, failing that I was looking at Bosch 8000 40kw. House is 3 floors plus fitted out basement, 4 beds, 1 bath (shower + bath) and 2 ensuites (1 shower + 1shower and bath), there are 25 radiators in the property. Any advice on what to go for would be greatly appreciated.

you are master of your trade i really wants to be gas engineer but i don't how to be in short time because of the family responsibility

Great video Allen, thanks. What would you rather have this or a Baxi Platinum+ 40? Situation is a large house with multiple bathrooms, but rarely going to be used simultaneously.

Great video Alan I always fit ideal but a few ppl ask for a Worcester so interesting to see an install. With the new regs on part l and the flow temp of 55 and lower delta tee can u do a video on how to size up a new boiler and system whilst adhering to the new regs etc

Great video... did you do a video on the control panel in the end as I can't find one...

Hi Allen, great channel btw. Are there any other boilers that come with a jig like this? I've noticed the 2000 range for instance that doesn't but I am looking for a more entry level boiler with a jig since we can't get to the piping easily

Thanks @allenhart999 for another great video, fitting one this week 👍

Hey Allen thank you for the in depth review, however I have just had one of these boliers fitted to replace a broken ideal logic 35. since doing so my gas usage has almost doubled in kwh what can I check to reduce it. I have the easy control wifi CT200 panel and the app which has no instructions whatsoever. I have found a few guide videos on youtube though Standard uk home end of terraced no changes made to the temperature selected on the thermostat but gas usage gone from daily average of 16kwh to 30kwh regards Kerry

Hi there, got a question. Not sure whether to go for the Greenstar 4000 30KW or 8000 30KW. It is being supplied by council due to using a first time central heating grant. I have been offered the 8000 as an optional upgrade. House is an extended 3 bedroom house with 2 bathrooms - 8 radiators in total. Both bathrooms are powered by thermostatic showers so will be using the hot water from the boiler. As I only have 8 radiators, would the 8000 be an overkill and waste gas? Or would it automatically adjust the power needed to heat the house?

Hi Allen. Would you choose this over the Viessmann 050 at the same Kw? Would really appreciate your advice. Cheers!

Hi Allen, just installed 3 worcester 2000, very similar to the 4000 in three flat. I turned the KW heating output down to suit. As in the Benchmark you need to add if you alter it and to what. The landlord then checked the booklet, asked what reason I did this, and told me to put it back up as the tenants would then need to run the boiler for longer. He also watched me do it so he could check it after I left.

Great video I would use a street elbow and socket for prv connection 👍

Great video. We have just had one of these boilers installed. If we have to turn the boiler off (for what ever reason) at the electric switch its connected to. When we turn it back on, will it have lost all its settings? Many thanks.

Hi Allen Great informative videos 👍 I have one of these boilers and it's leaking from the bottom of heat exchanger It appears to be the gasket I replaced a number of radiators and pressured it back up to 1.5 bar Then it started leaking I can't get hold of a plumber Can I replace this part myself? (Electrical Engineering/Electrician) Thanks Chris

How does this compare to the Viessmann 100-W? I've heard the Viessmann has really good modulation!

Yes guys I’ve got my ACS and EPA next month however I’ve also just been offered to do HIU and oil boilers on price, what should I do?

I’ve just been recommended one of these by butco so that all sounded pretty good

@ 10:29 I appreciate the fact that for many years now Bosch has been using low voltage coil gas valves that never break down

I have a question for Allen and the community. I am on the lookout for a new combi-boiler suitable for a flat. It is a 2 bed, 1 Bathroom. I plan to box it into a kitchen cupboard (Which will most likely need customisation to cater for the boiler). Flue needs to exit to the right-hand side of the boiler from the wall I plan for it to be on. I want something reliable and easy to work on for gas technicians when required. What would people recommend? I have a Vaillant on another property and although I was initially pleased I have the dreaded leaking flu which I believe is a design flaw in the Vaillant range and the warranty aftercare was awful. Could anyone recommend a boiler?

Hi Allan please continue with information on this boiler

For 3 bed detached 10 heater, one bath and ensuite shower , currently ideal istor he260 35kw, what would you recommend 4000 or 8000 model ? I am on the Worcester site to book replacement

Alan please reply. Do these vessels have a pipe in top left?

Hi Allen...looking to renew my gloworm ultracom 2 cxi30 in a 3 bed bungalow, 2 bathrooms, 12 radiators....I need something very energy efficient, and more importantly, I need it to last ,without breakdowns..Can you point me out something that you would put into your own house in this situation..Many Thanks

I have just had a boiler of this type fitted but I can’t seem to figure out where the heating filter is ?

hi , i had this boiler installed recently im unsure what temp to set the boiler on im in the uk , i have the thermostate on 21 and the water on 50 , but unsure what temp it should be ty

I have just had this boiler installed by British Gas I’m find the hot water in bathroom is not very warm says on boiler hot water temp 28.4 is that right

Was looking to find out the pipe measurements from the jig to the elbow, when using talon clips, as I wanted to knock up a few tails to speed up on-site install time, as I’ve got a new contract starting next week and wanted to get a head start. Thought I’d found the perfect video in yours, then all of a sudden when you’ve got a tape in your hand about to measure, the frame skips!! 😂😂😂 what happened, I’m guessing you bottled it because couldn’t find the exact measurement. 😂

Thank you was helpful, I am new in this industry, do you have any video, how to do full service on new Worcester , thank you

Hi Allen, did you say it's possible to run the pipes up behind the boiler? Does it need any extra kit to do that? I'm not an engineer but just planning a utility room and hoping to have all the pipework run up into the loft space above. Cheers

Good video Alan The rubber connector that fits on the trap didn't look to be fully home, they can be a bit of a faff to fit

Fan won’t turn off after switching heater off ?

Hi Allan. Can you tell me how I can change the water heat to above 60 degrees please? Thanks in advance!

Think the PRV connection is a-bit short so that it lines up with the older model PRV position when bent to the side (Juniors & i ERP) Im sure i seen a video on facebook about it. Not sure your supposed to take the left panel off, As theres a red x on the front.

hi allen : just wanderding How do I turn the heat off on my Worcester Greenstar 4000 on the screen? thx

Hi There, Having a 4000 fitted next week, can you explain what the hot water saving feature is please, I know you have to turn the tap on then off then on again but I’m mystified as to what it does? Thank you for the video, you are the reason I picked this boiler. Regards, Anthony.

👍👍👍

hi, please can you let me know I have fitted the boiler but engineer haven’t fitted filter is it gonna be any issue please anyone reply me thank you

I can’t understand why Worcester doesn’t provide the keyless filling loop with the boiler. I know you can buy it separately but when you subcontract the companies like Heatable they provide a cheapest flexi one. In my opinion, it is a shame (for both).

There is a problem on some of these boilers where the rubber flap between the fan and heat exchanger sticks from new. It won't ignite, gives you the fault code for no gas. Worcester said it's an issue with a batch of them and something to do with how they are testing them in their factory but had three of them in last month. The first one I wasted a lot of time investigating. Also hot water issue on the 25kws, if your mains pressure is high it won't heat so Worcester insist on fitting a pressure reducing valve in these situations. Thanks Alan.

We had one installed last year. For some reason, it is leaking from the left side a little. We can feel water around the edge of the boiler. Plus the water setting temperature number is not there. The heating temperature number is there but not the water temperature number ?

As always informative and helpfull been on the looking at replacing our old wb junior boiler with a vissemen for ages as i have never realy like them, looks like they have improved though not sure i like the idea of auto fill as im always scared of something going wrong when i away... how long have you been in shurburn Allen i swear when i look up where you were based you were west of leeds.

I have the same boiler but I can't figure out how to represurrise it. There's no filling loop, levers or anything. Any idea? Thanks.

I need a expansion vessel on ours, what size litre wise should i get? Thanks

I fit these everyday, the PRV sucks, we take the orange thing off first when the jigs on the wall and when the boilers on the wall then do the PRV after

Please cover the 8000 combi and system models

My boiler is showing low pressure. Can’t find how to add water Can’t find the Blue little flap for water.

Hi Do you got a video where you connect the wires and explain how?

hi allen , did you manage to read my comments on your previous vlog , thanks

Could you do a Worcester on priority hot water ?

how the bloody hell do you switch the heating off completely in the settings it seems locked to always on

Have they fixed the disintegrating flow turbine spacer yet ?

They made it harder for the elderly do they want them to call out gas safe just to top up a boiler inside the front panel they have a manual gauge for the gas safe installers

The installer interface is great, setting the boiler up for maximum efficiency. The price is something we are coming away from WB for. Margins are something we need to consider closely, 10yr on the 4000 and 12 on the 8000, price dose not justify the difference for the consumer or installer.

We fit a lot of the 4000 and 8000 . The worst things are the PRV connection what is it with the little rubber washer always popping out . and trying to do up the nut . The washers for all the service pipework. You have to fit the washers first then install the boiler.they sometimes fall off . The weight of the boilers . Esp the 8000 reminds me of the first gen CDI .But at least you can remove all the panels when installing the boiler. And the built in filling loop on the 8000 . that's a pain to use. And the digital pressure gauge for the customer to use .no where near as accurate. Apart from that they are good boilers.and they look swish in a kitchen.

Morning Allen, I emailed you on CHH LEEDS. is there any chance you can check please?

6:09 15mms street 90° bend and a 15mms socket!!

@ 10:50 after several decades of rubber hoses that get clogged with deposits, I also think you'll be happy when they also decide to surrender and put a rigid connection to the expansion vessel :)))) personally, after a few thousand serviced boilers, I have not encountered a single clogged rigid connection regardless of the diameter of the pipe from which it was made.... You are very soft with the criticism on Bosch after all the years of pain and dirty hands from their clogged hoses 😂 The approach from the video from another guy on RU-vid is what they deserve : Just search Urban Plumbers - Viessmann, is this why we could never get along And have fun. If you dont have the time for the full video just watch from 13:00 ahead… ;)

I take longer to connect that ridiculous prv, than I do piping the boiler up ridiculous contraption. While I'm moaning the flue is annoying also it's the only boiler I have issues with fitting

It needs a lot of efforts to set boiler on the jig right. Specially when you are on your own. 😢

You never told us the clip distance from boiler 😂

Is it flueless?

Prv kills the jig 😭

Is this the same as 8000

Aluminium heat exchanger and plastic parts.😢

It's not illegal to install a boiler it only becomes illegal gas side

Improvements in part positioning etc but they keep neglecting main hex issue and plastic parts ! I’ll pass

Try get one. Bet you cant

plastic hydroblock

whyyy are there so many usleess videos about this boiler but no one showing how to turn the heating on with the actual boiler rather than any wireless thermostat shit tech that barely works

OLD BOILER = PRESS 1 BUTTON AND HEATING WILL COME ON THIS BOILER = ADDERALL FORTNITE RIDDLED BOILER WHERE NOTHING IS SIMPLE AS 1 BUTTON PRESS ANYMORE

@ 10:50 after several decades of rubber hoses that get clogged with deposits, I also think you'll be happy when they also decide to surrender and put a rigid connection to the expansion vessel :)))) personally, after a few thousand serviced boilers, I have not encountered a single clogged rigid connection regardless of the diameter of the pipe from which it was made.... You are very soft with the criticism on Bosch after all the years of pain and dirty hands from their clogged hoses 😂 The approach from the video from another guy on RU-vid is what they deserve : Just search Urban Plumbers - Viessmann, is this why we could never get along And have fun. If you dont have the time for the full video just watch from 13:00 ahead… ;)