Loud banging from Worcester Bosch Greenstar 24i Junior

[SafeGasInstall]

you contacted me for a service and turn down my quote , now you see is going to cost you much more to do a simple service which i could have provide you with ! hot water comes at set temperature on this boiler , if you want to be able to adjust temperature on this boiler then should have picked up better boiler ! also they should have install the nox chip as you have 3 rads !

 

[M.Joshi]

£85 labour plus £35 materials +VAT seemed a little expensive. I also didn't understand what you meant by this: "Should any of the parameters of the fun or product of combustion are out then will be second visit". "Fun parameters are -3.5 -7.00 mbar of a negative pressure !"

I am aware that there is no external hot water dial on this boiler. The water hasn't ever been this hot before and therefore not a problem. As I understand, the hot water should automatically be regualated to a safe temperature on this boiler.

I thought this Worcester Bosch boiler was good at the time of purchase?

What is a 'nox' chip?

 

[SafeGasInstall]

good luck now

 

[tweakyboy]

You need to do a check on this boiler to tell you if the heat exchanger needs cleaning, you do it by putting your manometer on the fan pressure test point when the boiler is in service mode on maximum. For the 24i Junior it should be lower than -3.1mb. If this is ok and your analyser readings are all good I don't see any point in doing a strip down of the heat exchanger it means the customer has to pay more for seals/unnecessary work, but I still do all the working pressures/gas rates/condensate trap clean out/etc.

I agree with SGI on this a low NOX plug should have been installed and SGI is correct about the fan negative pressures as you can see I have mentioned above!

 

[SafeGasInstall]

£85 labour
£35 materials
this was for a full service ,
the bit you did not understand was if you were going to have a normal check on your boiler which would have cost you £50+vat !

 

[SafeGasInstall]

is next to your flux switch , google it and you can fit it your self

 

[M.Joshi]

is next to your flux switch , google it and you can fit it your self

Flux switch - haven't ever heard of such a thing?

 

[SafeGasInstall]

you are not a potential customer M.Joshi , you had your chance to use my services now enjoy the forum and google and I hope you have a good evening

 

[gassafe]

Whats the deal with that Nox chip i keeo finding in the Worcester Boilers? I have not ever fitted one. What are the benefits?

 

[SafeGasInstall]

keeps the out put low

 

[M.Joshi]

This is what I hate - cocky plumbers! I have no quarms about helping people on forums even though I am not in the trade. It is people like SGI that put you off believing there are genuine and honest people in the trade.

I have never heard of 'parameters of fun' and a 'flux switch' before. Could somebody please clarify?

 

[SafeGasInstall]

fun creates negative pressure , and if there is restrictions in the burner the pressure will get lower therefore boiler needs a good clean ,
ist the forum good , you can write and then delete your post

 

[SafeGasInstall]

by the way I am honest person and you have not got a right to make such a comment here , you dont know me ,you have never met me in you live !!! how could you come up with some thing like this ! I am well respected engineer M.Joshi

 

[M.Joshi]

fun creates negative pressure , and if there is restrictions in the burner the pressure will get lower therefore boiler needs a good clean ,
ist the forum good , you can write and then delete your post

Yes quite - you can choose to be more polite.

Is 'fun' short for something?

 

[SafeGasInstall]

"fun"-fan ( spelling issue )

 

[M.Joshi]

"fun"-fan ( spelling issue )

Oh, I see! However, mbar is generally associated with gas pressures not fan rotation?

What about 'flux switch'?

 

[Gray0689]

M joshi SGI gave you a price and you didn't take it you got another company in for less money and you still have problems
Do you really expect him to now tell you the problem for free????
Don't see any comment as cocky apart from yours this is a gas boiler that legally you can not work on so why should you be told what the problem may be I'm sorry you didn't get a decent plumber in on the first place but if you want it sorted once and for all I'd do a bit of apologising to SGI

 

[Roger Welton]

Oh, I see! However, mbar is generally associated with gas pressures not fan rotation?

What about 'flux switch'?

mbar = 'millibar' just a unit of measure is used for lots of things including in the weather forecasts

 

[M.Joshi]

M joshi SGI gave you a price and you didn't take it you got another company in for less money and you still have problems
Do you really expect him to now tell you the problem for free????
Don't see any comment as cocky apart from yours this is a gas boiler that legally you can not work on so why should you be told what the problem may be I'm sorry you didn't get a decent plumber in on the first place but if you want it sorted once and for all I'd do a bit of apologising to SGI

I thought I hired what was a good Gas Safe Registered company to do the service - turns out that they didn't do the service correctly. When I saw 'fun parameters' and 'flux switch' mentioned, I assumed these were absurd comments. If I am wrong, please correct me.

I don't intend to repair the fault myself and wouldn't touch any gas parts. Besides, I've heard that the hydraulic block is a nightmare to remove on this model anyway.

I am not asking anyone to repair the boiler for free. Just after some genuine advice so that I'm not fobbed off. I have provided advice to other users on this forum without any sly remarks and expect the same from other members regardless of their experience level or number of posts.

 

[M.Joshi]

Incidentally, thank you to SimonJohns, dancinplumba, Roger Welton, glenno1, cdodds2004, Millsy 82, RPG 80 and tweakyboy for their advice on this post so far :icon14:

 

[SimonJohns]

Did I do good?

 

[M.Joshi]

Did I do good?

SimonJohns, you were the first person to reply to the post suggesting a faulty TRV.

 

[SimonJohns]

SimonJohns, you were the first person to reply to the post suggesting a faulty TRV.

Was I right?

 

[M.Joshi]

Was I right?

The TRVs haven't been replaced yet! We just tweak one of the radiator valves when the noise occurs.

 

[GrahamM]

Thanks for everyone's replies so far.

We've just had a service on the boiler today - the D2 TRVs have been ordered.

I am a bit concerned that the service wasn't done properly. We paid £60 +VAT and this is all that was carried out:

Remove cover
Check gas pressure / boiler output
Clean out condensate trap
Visually inspect heat exchanger from outside

I mentioned that the hot water was extremely hot at the time of booking the service but, they were not able to find out what was causing this? They only identified that the hot water pressure was lower than the cold water pressure, the hot water was cloudy and that a filter? may be blocked in the boiler.

I thought that during a service the boiler should be stripped down and the heat exchanger inspected for any corrosion. Does £60 +VAT seem expensive for this service (NW London)?

They didn't carry out a flue combustion analysis - when I asked why not, they said it wasn't required on a standard service. Their meter was away for cal. but they could do this at a later date!

So, is the above list all that is required for a full service?

Just had a quick re-run through the thread.
I had it in my head that this was a Worcester Junior 24i as per the title and have just realised it is a Worcester Greenstar 24i Junior. Is this correct?

If so; how can the engineer you had do the so called service confirm safe operation of a Zero governed boiler if no flue analysis was carried out? If this is the case you have been stung in my opinion. You have paid for someone to look at your boiler and say "I think it is running ok"!