THANK YOU ALL FOR YOUR INPUT
YOU HAVE ALL BEEN VERY HELPFUL AND POLITE TO A NON -TECHIE LIKE ME .
JUST TRYING TO SAVE MY MUM MONE THAT SHE DOESNT HAVE. CHEERS
ANNE
Gavinda
shes got immersion heater
Pipes cold to hw cylinder going in and coming out-still think is is blockage in tank or in pipe from boiler do you think this makes sense.If you have given enough advice thaks for your helpBest wishes Anne
Will the cleaner be powerful enough to clear a sludge blockage between boiler and hot water cylinder or sludge around coil in tank - I think thats what I mean!!
no hot water radiators hot on water priority upstairs presume this is gravity .Boiler fires up then starts kettling swiches off.Pipe cold to cylinder.Will cleaner dislodge sludge or is that too much to ask a 30 year old system