steptoe
VIP Member
Engineers have letters after their names, I doubt many gasmen have that,Anything less is a temporary repair and or bodge.
Certainly if the op wants to do that himself then remember to blank off the header tank, disconnect the cylinder and scrape out the return pipe on the cylinder and the pipe work itself, treat each radiator individually for 30 mins at a time finishing off with a rattling across the face with the rubber mallet and then a thermal image and then flush the system as a whole.
Takes all day hence the labour cost.
I replaced the inlaws prima with a second hand water damaged Worcester junior. Cost £95 for a gas valve.
Took me all day to replace boiler and disconnect header tank, cylinder / alter pipe work and would certainly not do that for £200-300. Combi replacement maybe £500 .
Guess where it was choked before the flush, round about the hw cylinder.
There you go pl1976 based on the information you posted here that's the advice from a heating engineer. Wouldn't use any advice from others on this thread as it's no where near the correct solution and as you said the plumber you got out fixed bugger all but you still had to pay for the privilege.
Please don't devalue the term engineer,
I'm an electrician that specialises in heating controls, so work closely with plumbers and gasmen all the time,
A lot of BG plumbers are actually subbies, and they get commission to upsell jobs.
A power flush in a system boiler should be iro £500 tops. Dependant on area , obviously, London prices are a lot more.