History0 min ago
No hot water to shower
We cannot get any hot water from our shower(mixer-over bath) when heating is off-boiler fires when hot tap at sink (next to shower) is on, but nothing happens when bath/shower tap on. only solution is to put CH on when we want to have shower. Any ideas why this is happening? The boiler is a museum grade 'ideal sprint' and due to be replaced next month, so do not want to have to call out plumber if we can fix this ourselves. Thanks in advance.
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its almost certainly the mixer tap at fault rather than the boiler as mixer taps are notorious for causing problems with combi boilers. im a gas engineer rather than a plumber so i don't fully understand whats going on but i believe from a conversation with one of the boiler makers tech helpline staff a while back its something to do with the cold water backfeeding up the hot water pipework