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Just fitted new Worcester Bosch Condensing boiler. The boiler is in the basement and the flue is routed out through the wall and into my driveway about half a meter from the floor, the same routing as the old WB. But although it's my driveway the pluming is a bit of a nuisance. Cannot route it...

Engineer has re-attended and come to the conclusion, after changing the second heat exchanger with no success, that the back plate of the boiler is blocked with scale and has deemed it un-repairable. Has advised to power flush system and install new boiler. :( How easy is it to power flush...

I have paid out the original £230 call out charge and still having this problem. Can the boiler be flushed out or cleaned in any way? Is it advisable to take each and every radiator off and flush out? What's the best way to power flush and could it be done by a layman ie. me who has a plumber...

pump has been changed. No difference.

When hot water is demanded from taps/showers (Combination Boiler) it keeps going hot and cold. I have had the WB engineers out three times now and although they have changed many parts including exchangers, pump, diverter valve, and it works OK for a while it always reverts back to intermittent...

Not really. The sensor was checked on the initial visit from worcester who then changed out the heat exchanger. If the system was not flushed after installation of the new exchanger could it get sludged up in that short time and could that be the problem. Hope someone out there can...

sensor checked on the visit from worcester, thought to be OK ?

Problem with hot water. C/H OK but when any hot tap is turned on, the boiler fires up for a couple of minutes and then cuts out for about 30 seconds and then fires up again. Worcester have been out and changed the heat exchanger ( 230 Quid !! ) which seemed to work for a few weeks at least, but...