ADVICE please - Adding pressurised Leak Sealer to Ferroli Combi?

[bilabonic]

Hi All

I have a Ferroli Domicondens F24 and it's slowly losing pressure after a few days, i can not find any leaks anywhere so looking to use a pressurised can of Sentinel Leak sealer - Sentinel LS Rapid Dose Leak Sealer & Adaptor 300ml - https://www.NoLinkingToThis/p/sentinel-ls-rapid-dose-leak-sealer-adaptor-300ml/7013v

I have a 'magic fill' thing where u isolate a rad and manual fill, but do not want to faff about draining rad etc as it's in my Aunts house.

What is the best way to add this, i have read reviews and some say add to rad, others say add at filling loop?

Boiler manual -https://www.ferroli.com/media/1506955516.pdf

Any advise please to the easiest/best method.

Thanks

 

[oz-plumber]

I've found in the passed that leak sealer seals all leaks - even the ones it not meant to.
- automatic air vents inside boilers.

Your problem may be a simple fix, check PR valve and expansion tank pressures

 

[bilabonic]

I've found in the passed that leak sealer seals all leaks - even the ones it not meant to.
- automatic air vents inside boilers.

Your problem may be a simple fix, check PR valve and expansion tank pressures

Thanks for reply.
I think the H Ex has gone, i tried to fill it a few times but its losing pressure within 1 min, it's coming directly out of the condense pipe?
It was also kettling like mad, sounded like a bag of spanners be rattled about when it was trying to fire up....

 

[king of pipes]

Time for a new boiler , leak sealer in a combi will kill it for sure . Kop

 

[bilabonic]

Time for a new boiler , leak sealer in a combi will kill it for sure . Kop

Having MAIN fitted later, 5 year warranty.

Cheers guys.