I have a Valliant Combi fitted about 4 years ago. When I run the hot tap, it takes ages for the water to change from warm to what id call hot. Sometimes it just stays warm and never gets hot, on other occasions it gets hot eventually but takes a long long time - well over 3 minutes of running the tap.
Any ideas why this might happen? The target temp for DHW is set to max, which is 65 degrees.
Any ideas why this might happen? The target temp for DHW is set to max, which is 65 degrees.