I know this is a common problem but Im after some advice. The boiler is 5 years old and we are in a hard water area. The main heat exchanger is kettling as we have changed the plate HE to no avail. I have used Fernox F5 and that helps but you can only get hot water for about 5 minutes on low running tap for about 3-5 days before it goes again- central heating runs OK.
I have bought some Fernox DS-40 but Im just a DIY'er and was going to stick it in a radiator and run it through the system then - my main Q is - will this do anything for the hot water system.
The container the DS-40 comes in looks large - shall I use it all (I will flush it a few times after and neutralise).
Should I just get it power flushed professionally - the reason I have been holding off is that we are having building works done in May and we are getting a new boiler fitted then.
I have bought some Fernox DS-40 but Im just a DIY'er and was going to stick it in a radiator and run it through the system then - my main Q is - will this do anything for the hot water system.
The container the DS-40 comes in looks large - shall I use it all (I will flush it a few times after and neutralise).
Should I just get it power flushed professionally - the reason I have been holding off is that we are having building works done in May and we are getting a new boiler fitted then.