I have posted this before but the subject line might not have been
When I use my shower my combi boiler overheats. It doesn't overheat
at any other time, and the overheating is independant of whether the
central heating is on at the same time.
I have been told that showers using mixer taps can cause the boiler to
overheat because the flow of hot water is reduced compared to when the
tap is running. To make matters worse the pressure from the cold tap
passing through the mixer causes the hot water flow to be reduced
I am sceptical of the above because sometimes I can stand in a hot
shower for ages with no overheating, and other times the boiler will
overheat and cut out after a few minutes. I suspect that I have a
faulty overheat sensor, but without any in-depth knowledge of combi
boilers I cannot confirm this.
If it is the reduced flow causing the overheat where can I buy a high
flowrate shower head? The one I use at the moment has quite a high
flowrate as it is!!