Biasi 24S 'kettling'

[cb1980]

Right, some backstory: last winter my hot water failed. Various local gas 'experts' wouldn't come out because they were clueless about Biasi and had tried and failed to fix this exact problem before. Eventually one of them gives me the number of this guy who knows what he's doing. He comes out the next day, replaces a 50p rubber diaphragm in about 20 minutes and charges me £70 for the privilege (expensive, but fair enough he fixed it straight away and he had a decent drive to get here).

Anyway, at the same time he says the boiler is 'kettling' a bit and needs some inhibitor and the PCB settings changed, and to get it done when the boiler's due a service. The boiler's now due a service.

Is this going to be something that a general boiler servicing chap is going to be able to do? Or do I need to call the same Biasi guy out again (or find a similar one at least)?

Ta

 

[Gasguru]

Burner pressures require checking.

If it kettles on hot water it could be a partial blockage in the plate heat exchanger (extra 30 mins to clean out) or replacement if really clogged. Often the boiler will sound like an aeroplane though.

Kettling on heating may just require heating output matching to the system load....5 minute job.

If it still kettles probably needs a new primary heat exchanger.

But there's plenty of other posibilities

The 24S is one of the easiest boilers to work on but you're best to find someone familiar with it.

 

[Agile]

It takes less than a minute to reset the PCB parameters.

You could try adding X200 to your system, that might work.

Few gas people seem to understand this problem. We always clean any scaled heat exchangers, total £180.

But you would not like us as we charge £106 for that "£70" job you had done. But we do a service and set the boiler up properly.

You really need a competent engineer, not always so easy to find!

Tony