[Closed] Replacing a boiler PCB.

Disclaimer: I just work in a merchant and this is how it's been described to me. I'm not an engineer nor have I ever changed a board in a boiler.

You don't need a Gas Safe card to work on it as you aren't touching any gas carrying parts. Don't go in and take everything off the board then find out that you have no idea what goes where on the new one. Have the new one ready and as you take the cables off the old one plug them onto the new one. Some will invariable be easier than others. What boiler is it?

Hi
I changed the board on my old potterton combi , it was pretty easy tbh

I did my Potterton too. There seems to be a lot of debate whether or not you are allowed to do it without the Gas Safe Certificate.

I was meticulous in photographing every wire and drawing the wiring as I took it out. That helped a lot.

How would you go about testing the new P.C.B?

I was meticulous in photographing every wire and drawing the wiring as I took it out. That helped a lot.

This - my Baxi one was only a few plug in bits though, quite hard to get wrong if you were methodical. The other thing was to use the foil strip they give you to 'earth yourself' against static, and check it's switched off properly at the mains before you start.

15 minute job for me.

Plug and play = go for it! Make sure the power supply is properly isolated 1st though. Use a proper voltage tester or at a push a multimeter.

I changed mine. As far as I can remember I just removed old unit, inserted new one.

Did one at work last week. Only a couple of connectors wired to the PCB. There was only one way they'd fit back on, so no chance of getting it wrong. Takes a couple of minutes.
Make sure you pull the fuse first before you start messing with it though.

Where are you getting the new one from?
I ask, as someone I know runs a PCB refurb business, and keeps most PCBs in stock for next day delivery.
Usually a third of the new price, so maybe worth a look?
http://www.cetltd.com/

And yes, dead easy to swap one. The majority do not have plugs that can be mixed up, but take a pic beforehand.

i too work in a merchants and hsve seen alot of internet bought items that aren't the correct item. a local plumbers merchant eill be able to give you the manufacturers part no for the pcb from the G.C number of the boiler.
also some boilers have more than one pcb.The good news is you don't need to be gas safe to change s pcb. as described before put the plugs onto the new board as you take them off the old one.a couple of photos will help you locate them. it is isually an easy exchange and I hppe it works for you.

I fixed mine by replacing 3 caps at a cost of about £2. Cheapest exchange one was about £60. If you've time and a soldering iron it might be worth a Google to see what usually fails on the one you've got?
As above with removal and replacement, take a few photos.

Ok what I meant is some models require setting up with a F.G.A,please check the full sequence needed for your exact boiler.I think you will find that the answer is get an RGI to do it and check it properly.Why can your plumber not sort it before next week,surely you can get it and HE can fit it and check it.

Depends on the boiler and just hope your plumber has diagnosed the fault correctly 😯

I should say that mine was a very common boiler with a very likely PCB failure, so there was tons of info online about it.

Probably best to ask your neighbours what they think.Does your insurance cover it?

I don't mind paying someone to fit it but I was suprised by the vague 'it'll probably be next week sometime', I'm cold and I stink...

Doing a bit of research shows blow relays are a common fault on this boiler pcb. It's a worcester 28i junior RSF.

Where are you located?

Devon. I'll call round a few more people tomorrow

As already said,once fitted the boiler should be atleast gas rated and a flue gas analysis carried out to within the manufacturers specs,good luck mate and hope you get sorted quick! I do this for a living and spend most of my time freezing coz the boilers I go to are usually bust.

Not read the above but in case anyone hasn't mentioned it, once you open the security tape on the box you can not return it if it doesn't solve the problem.

My Father in law had a problem with the pcb which housed the ECU on his Volvo. He was quoted ~£800 for Volvo to replace and coukd get a genuine part for around £350.

He removed the pcb, took it to the local tv repair shop who charged 8 quid to test and repair.

The car worked fine after.

Any where near Ilfracombe or Barnstaple

If its any help i live in East Devon and am gas safe registered.
To clarify any person undertaking work on a gas fitting (boiler included) must be deemed competent to do so, competency is taken as being ACS qualified and registered with gas safe.

I've changed all manner of shit on mine but never touched the "gas" side of it.

i d have no trouble describing the control board as a gas control. so if you can justify yourself as a competant person in the eyes of your local HSE go ahead.. but ask a question..

changing a pcb is a 30 min job why is your plumber saying he cant do it.. is he really saying he WONT do it.. most PCB are 100 quid plus and thats a bet hes taking that hes right it is the pcb.. british gas are your friend here with thier fixed fee repairs..

HSE? 🙄
We'd better give building control a ring as well hey fellas?
Thing is plumbers that I know of nowadays have no real interest in fixing boilers unless it's something very obvious due to all the diagnostics involved.
A heating engineer is what you require.

At a guess since he cant do it till next week i reckon he cant do it cause hes busy with better paying jobs than driving to the op's house for 30 minutes and needs some time to get the parts.

But anyway after pcb replacement you should really have the boiler checked as per new commission to check its all working right.- can you do this ?

I've changed bits inside my boiler, but wouldn't crack anything holding gas or the combustion side of things.
I even fitted & plumbed the thing in, but left the gas bit to a plumber.
Water might make a mess, but it doesn't explode or kill you. My little boy sleeps in the next room. Enough said.
I'd happily swap the pcb but only if I'd read the manual. As the chap up there said, sometimes they need a commissioning sequence or settings to put in.

usual mix of answers as you'd expect.

he was a heating engineer working for a company who specialise in worcester boilers so I'd hope he knew what he was doing and wanted to do the work.