Worcester 30Si misbehaving ?

[king of pipes]

Get your installer to take the old bypass valve out and just cap it off both sides , 15 mins work if that turn your boiler stat down to 2-3 give it a try , you will know if you need a chemical clean .

 

[damovs]

Get your installer to take the old bypass valve out and just cap it off both sides , 15 mins work if that turn your boiler stat down to 2-3 give it a try , you will know if you need a chemical clean .

Thanks for that again kop. Just to check I understand you correctly tho, by suggesting to remove the old bypass valve, are you also implying that he install one of the newer spring-loaded ones you mentioned previously?

 

[jtsplumbing]

So, I've been looking at info re the spring-loaded bypass valve, and it seems like that is definitely the way forward these days. But again, the one in place is left over from the original CH install about 15 yrs ago, when I from what I've read it was normal to have a valve like I have partially open.

So in order to try and resolve the problem, which is definitely still persisting, what is the best order of suggestions from above to carry out? I will get a price for a re-pipe, but I would prefer not to go down that road until summer unless absolutely necessary. Then I may consider changing rads, valves, etc if reqd. For now, however, perhaps just adding one of the cleaning compounds to system followed by powerflush & replacement bypass valve change. Might that be a good plan of attack?

Cheers

Use Fernox F5, replace old rad valves, don't waste your money on power flush with 10mm pipes , not recommended, Places sludge usely collects is in valves due to size of waterways, rads,and I have had blockages in the man-a-folds, so replace them as well

 

[king of pipes]

Just try what I advised first you can install a external bypass later there is one in the boiler so will be ok just don't run it flat out until you have proved you have flow .