COMBI boiler heat exchanger TUTORIAL & RIP OFFs

Sooner or later a component will FAIL, if badly installed SOONER, if correctly installed parts will wear out, no problem
How to spot the 2 faults? Easy,
1. High pressure, should be 1 bar 247 it’s not suppose to rise, that’s the expansion vessel being TOO small
2. Lack of inhibitor, a Gas Safe HAS to test EVERY year, was your boiler done this year?
3. External AUTO by pass, where’s your’s?
4. 60C flow temperate not +70c; Use my Heat Loss and Gas Pipe sizing APPs to find out
Replacing Parts:
1. Always use the original manufacturers latest version replacement parts
2. NEVER use RE- CON parts, you are being ripped off with OLD stock.
3. Use a factory trained engineer.
4. Get 3 quotes
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[@eazyrat]

thanks. what is silencer and how does it work?

[@mrcombiBedford]

Hi Eazy, thanks for asking, on a new install have to put F1 inhibitor to coat the system within to stop corrosion and remove air bubbles, then on the next drain down we refill and use F2 silencer which is a mild de-scaler which stays in to keep the system clean, often not done, most installers use F1 which is no good, waste of time, that's why they make F2. Hope that helps. George 👍

[@eazyrat]

@@mrcombiBedford whaaaa that's the first I've ever heard that. I'm a new engineer I've heard of silencer before but wasn't sure exactly what it does or how it works. Everyone I know uses cleaner then leaves inhibitor in. Just looking on fernox website says cleaner then inhibitor where did you hear to use silencer? Thanks

[@mrcombiBedford]

@@eazyrat Hi again, You are correct. Since 1970 the 'Codes' require on a new install 2 cold flush and then a hot test at MAX boiler / room stat temperature for at least 10 minuets, I can bet you this is NOT done. then the system is drained and refilled with cleanser again 10 mins. in hot. drained and filled with F1 inhibitor / protector. Because installers don't do this, in about 4 years the Dom exchanger / system gets slugged up, (money for the installer) the Plate 2 P is NOT replaced as required by the 'Codes' and manufacturers instead drain acid is used to rip off customers. If a water part is replaced in 6 years after install what's the point of putting F1 inhibitor? That's why Fernox and others make F2 Silencer to slowly clean the system, again installers won't do this it's bad for business. Watch the vids on blocked P 2 P they make much more money than replacing faulty parts. Hope that explains, take care, George 🤩👍

[@eazyrat]

@@mrcombiBedford OK thanks yeah I think I know a few of them...

[@mrcombiBedford]

Unfortunately so do I👍