heatline c24 combi was left off for a few days and now hw is ok but on ch boiler fires up overheats and cools down continous cycle the pump is spinning as i tested it with one of those grundfos gadgets but not sure if its spinning fast enough. is there a sure fire way to test a pump the upstairs rads get a tiny bit warm if i shut them all off apart from 1 or 2 they get hot
im thinking
check for sludge
strip pump down and check impellor
check diverter valve for letting by
other than this im clueless
any suggestions welcome fellas
im thinking
check for sludge
strip pump down and check impellor
check diverter valve for letting by
other than this im clueless
any suggestions welcome fellas