As a heating engineer with 40 years experience,I hate Worcester products with a passion.Its a damn shame they are so popular as I hate working on the piles of shit.

Who thought of putting the pressure relief valve at the back, Excellent Job of replacing it

Excellent, I'll be doing it your way from now on when doing the PRV. much less hastle than taking out the whole hydraulics assembly. I like clever people like you. Cheers

This is exactly the reason I do not recommend nor install Worcester Bosch. With a Vaillant, the same job takes ten mins = less time, less charge to customer. Have just done one on a *astard Greenstar 28i and the plastic cowl would not lower, as it had jammed in place with scale. I could not force it for fear of snapping it, so this took even more time. Easiest way is to isolate cold water feed on boiler, drain DHW circuit and cut the DHW pipe a few inches below the boiler, or however much you need for your arm and hand. Unscrew the horizontal compression nut, and remove this section of pipe, using a 15mm compression couple to reattach. My hands are huge and I’ve Popeye forearms, but still manage. If things go your way, 30 to 45 mins.

Great video, I have one to do this week, only comment I have is that I would use my wet and dry vacuum and use the bin liner over the pcb housing, also I always re pressurise the PV to get rid of anything in while draining, those things can hold a lot of water.

Buddy, this really helped me today. Many thanks!!

Thank you for this video. Only problem I encountered was the pipes run up the back of my boiler which means there is no room to take the exchanger back to get it out. You can however loosen the right hand pipework mount to bring it forward enough to lift the right hand side of the exchanger out if the way to get at the pressure relief valve.

Excellent video, good filming, with good lighting and editing

Good video, but if only worcester had put prv like other companies in a more accessible place we wouldn't have this bother.

At about 2.40 you made taking out the prv clip look easy.

Worcester reliable - YES. Easy to work on - NO. All PRV's fail but why make it a nightmare to replace. Also I found removing the whole hydraulic assembly quicker to change the PRV. Same situation with the idiotic plastic filling loop from the CDI's onwards, why did nobody in W/B work out how shit the design was until 20 years or more had passed. Just like Vaillant/Glowworm pressure switches & leaking diverter valves; why don't they learn from their mistakes. Great video and keep them coming.

Class video helped me out today

Plastic hydrolic section piss out water. Burner seals leak, poor access to prv , expansion vessel at back. Worcester redesign your boilers.

Brilliant video. But all you actually need to do is cut the hot water pipe out of the way and use two screws to remove.

HI Luke when you have remove the clip that hold the prv in place you will need to pull the p r v out of its housing hey can be stiff the prv sit in a slide connector you pull the connector down to remove prv

Good video mate, must agree with other comments on how these boilers are trash. You will pay for the name and the boiler is full of plastic, can’t imagine the mark up on these. Also instead of making the flow turbine into a decent design they just chucked a green rubber jacket over the motor instead of making it so it doesn’t leak so easily!

Great vidio,

Excellent video

Just cut the cold feed out and u can fit your hand behind without needing to strip it down

Great vid

Is this the correct prv plastic one i fitted its leaking or shall i fit the brass one wonder why is leaking

very helpfull

strip half of the boiler to get to prv.how they claim to be the best .probably the worst design ever.detest working on these.

Check the white tundish is pushed all the way up after fitting prv. Otherwise it'll just piss out everywhere except outside

well in, I've got a hot water running cold then hot on WB greenstar 24i. when I started the job I was told by the woman hot water on when on or off. I thought diverter stuck mid position. so I had the cartridge out and it's rusted to death along with its housing so the customer advised to replace. the partner returns and says his prv is also dumping bucket loads. will his prv be connected his hot and cold problem or would you say it's the diverter unit and housing that's on the way ?

great stuff that pin can be a nightmare though

Hi Geoffrey, Can later model heat exchangers with more plates be retro fitted to earlier models? If so, are there any adverse effects? Thanks

As other comments this fails when pipe work is run in the Worcester suggested position up behind the boiler. And you didn’t push the outlet back up onto the PRV so there will be a drip under the boiler next time it has to let water out.

Nice 👍

Do Have to do all that to just replace the PRV? I have a Worcester Bosch 42 Cdi

The pressure release valve holder ,the plastic thing,can move up or down to accommodate the PRV.You got to push it up to fit the PRV.

Thank the gods now, on the new Worcester 8000 series the prv is at the front. Top bottom and sides come apart, colour coded parts inside for engineer. Slightly smaller and whisper quiet👍

Just take the boiler off the wall and fga

Just cut the h/w outlet pipe push to one side & the plate falls out down left hand side.

Why didn’t you remove the diverter valve or free it up?

Who made this boiler deserve to be kick out from Worcester factory

Hi Geoffrey, can I please ask what long nose pliers those are, that ur using? Thanks

U can both these parts by removing the cold pipe done both this way far lass parts removal

How do you tell if the expansion vessel is faulty, not just the PRV?

Hate those silly plastic clips they've used on the pump.

Drill out the three pop rivets that fix the bracket for the plastic PRV outlet pipe and the pipe can be lowered away. The PRV can then be removed horizontally after fiddling with the clip.

Hi, Thanks for the excellent tutorial. I have managed to follow it throughout, but unfortunately I cannot remove the PRV at the end. It is unclear exactly what the mechanism for removal is. Could you clarify - thank you!!

Yet to this day Worcester haven't relocated the PRV to a more accessible point

Really bad design for engineers I wonder why all engineers like vaillant

Stupid design for a PRV. It should be written in regs that any safety device is immediately accessible for regular inspection. How long has it taken for side mounted expansion vessels to be the norm.

I never recommend Worcester to my customer unless customer insist for it its crap boilers hard to install and hard to repair..

All you can see is the back of a hand 🤷‍♂️

without doubt the easiest way to do any repairs on any worcester boiler just turn down any work repairing them, very poor product with outstanding marketing team

What's with the fast Video

If you get this job Go Sick

Great video. The PRV only needs replacing in rare cases so it's not Worcester's effort to make it more accessible. What matters is they've created a very reliable boiler that is respected within the industry.

Fit a baxi. Buy fittings from the importers www.thecopperking.co.uk

total overkill video , can save most the work just by cutting the hot water draw off pipe , gives you more than enough room unless you have time to kill .

worcesters are as bad as gloworms to work on in the hydraulics

Worcester boiler designers are toxic...