The shower and taps were all working fine until about two weeks ago. then noticed that the water temp was going up and down. Shower runs straight off boiler. Turn on and instant hot water Normally
Can anyone suggest what the problem is please.
I have a Vaillant turbomax pro 28e GB 282
Recently when the shower is on the hot water goes hot and then luke warm and again hot. Getting really annoyed with this and can't really afford to get new boiler.
Has anyone got suggestions as to what...