worcester 24i combi RSF .boiler is working fine, but after shutdown and about 5 minutes after the heat dissipation phase has finished, a loud disturbing thump is heard! any ideas?
I have the same problem when I turn mime on, stops after about 10/15 mins then starts up again. Thought it was air in system so bleed all the rads & topped the water up as noticed it was lower than norm, none of which have solved the problem.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.