New boiler Worcester Bosch Greenstar 15Ri, comments

[calibra]

No, I don’t think it’s a proper fault code, hence me tagging in x2 Vaillant expert engineers. It could be an electrical fault.

Thank you fingers crossed, just tried it again and still running, no idea why, wouldn’t run more than 40 seconds yesterday or all morning how can I reset the fault menu in case it’s glitched

UPDATE Was running for around 15 minutes, got to 53oC then started banging and crashing again, turned it off sounded awful

 

[calibra]

Sorry

 

[calibra]

https://www.facebook.com/video.php?v=635805744277429

copied link from FB page, don’t know why it’s not working

 

[fixitflav]

Thank you fingers crossed, just tried it again and still running, no idea why, wouldn’t run more than 40 seconds yesterday or all morning how can I reset the fault menu in case it’s glitched

UPDATE Was running for around 15 minutes, got to 53oC then started banging and crashing again, turned it off sounded awful

Was the pump running when the banging started? LED on the pump lit when running (or at least getting power).

Last time I had a banging boiler was many years ago on a CH501 boiler. This had a modulating burner, with a bellows to work the gas valve. The fluid had leaked out so no modulation. It was OK on CH as the temperature didn't rise too high (plenty of rad area vs boiler output) but on HW it started banging. Replacement part cured it.

 

[calibra]

Error

 

[calibra]

Was the pump running when the banging started? LED on the pump lit when running (or at least getting power).

Last time I had a banging boiler was many years ago on a CH501 boiler. This had a modulating burner, with a bellows to work the gas valve. The fluid had leaked out so no modulation. It was OK on CH as the temperature didn't rise too high (plenty of rad area vs boiler output) but on HW it started banging. Replacement part cured it.

Yes the pump was still running ok

 

[fixitflav]

Yes the pump was still running ok

Mmm, puzzling. Have you tried contacting Vaillant, to see if they have any ideas? It would be a shame to replace the boiler and find you still have the problem.
Any chance of flow being restricted?

 

[calibra]

Unlikely, everything gets so hot so quickly, Vailant say blocked H.E. But don’t see how it can run from COLD for 15-20 minutes without issue then B&C…..like to reset the fault menu, found how to do it on another forum but doesn’t seem to work

 

[sxturbo]

Does sound like a blocked heat exchanger,

The water flows through it but not fast enough.

I'm pretty sure I remember these boilers have tiny water ways in the heat exchanger

 

[calibra]

That makes sense, as it heats up not enough water can get through the H.E. for the higher burn. Should have seen that, thanks, and yes I’ve heard this type of boiler does have narrow waterways. So could a chemical flush of the H.E. devolve the limescale, think it would need to be removed to do it properly

 

[calibra]

Is it an expensive job to remove the H.E. and chemically clean it, also would that remove all limescale thanks

 

[sxturbo]

Depends on who does it, it does have to be someone who is gas Safe.

It doesn't always work.

You can get high power cleaners you can install in the system, but they need the boiler to run to work.

 

[calibra]

Depends on who does it, it does have to be someone who is gas Safe.

It doesn't always work.

You can get high power cleaners you can install in the system, but they need the boiler to run to work.

That’s what I was afraid of, when you it doesn’t always work, are you referring to removing the H.E and acid washing ? Think all in all I’m better off with a new boiler, getting strange shutdowns now after 40 seconds, or the kettling, as it’s 14 years old it may be throwing good money after bad.

thanks for everyone’s help

still curious how to reset the error menu ?

 

[sxturbo]

That’s what I was afraid of, when you it doesn’t always work, are you referring to removing the H.E and acid washing ? Think all in all I’m better off with a new boiler, getting strange shutdowns now after 40 seconds, or the kettling, as it’s 14 years old it may be throwing good money after bad.

thanks for everyone’s help

still curious how to reset the error menu ?

Yeah I looked at the price of new heat exchangers yesterday and there a couple of hundred quid.

For now it would be worthwhile buying some sentinel x800 and seeing if that helps at all

 

[calibra]

Problem is the boiler won’t run more than 15-20 minutes a day.