Hello all. This problem has only become noticeable since I installed a mixer tap shower in the bath.
Basically, when a hot tap is on, the combiboiler fires and hot water runs constantly (obviously at a reduced flow compared to the cold but still at what seems to me a reasonable rate). However, when the cold tap is added to this to get the desired temperature, the boiler begins to cycle on and off. It does not turn off for long, but easily long enough for the water to run cold. This also happens at my kitchens mixer tap but that obviously isn't nearly as noticeable as when the shower does it.
So I assume the addition of the cold is increasing the flow pressure against the hot water causing it to go through the boiler so slowly that the boilers thermostat turns the boiler off as the target temp has been hit. Well done, clever boiler. Not much good for me having a steady hot shower though is it?
So is it reasonable that the difference in flow rate/pressure between the hot and cold causes it or does that demonstrate a definite fault somewhere? Could there be a problem with how much water is going through the boiler? Any suggestions as to what my next steps to either fault finding or fixing might be?
I am a reasonably competent amateur in terms of the nuts and bolts of pipes and taps etc, but I'm definitely a rooky when it comes to this end of things so any hints and tips as to what to do next would be gratefully appreciated.
I'm not afraid to call in a grown-up if I have to, but I like to have a bit of a bash first myself!
Details:
Cold tap will do 2 litres in 10 secs
Hot tap will do 2 litres in 16 secs
Combiboiler is Worcester Bosch 24i Junior
Would any other info help?
Many thanks for your time!
Basically, when a hot tap is on, the combiboiler fires and hot water runs constantly (obviously at a reduced flow compared to the cold but still at what seems to me a reasonable rate). However, when the cold tap is added to this to get the desired temperature, the boiler begins to cycle on and off. It does not turn off for long, but easily long enough for the water to run cold. This also happens at my kitchens mixer tap but that obviously isn't nearly as noticeable as when the shower does it.
So I assume the addition of the cold is increasing the flow pressure against the hot water causing it to go through the boiler so slowly that the boilers thermostat turns the boiler off as the target temp has been hit. Well done, clever boiler. Not much good for me having a steady hot shower though is it?
So is it reasonable that the difference in flow rate/pressure between the hot and cold causes it or does that demonstrate a definite fault somewhere? Could there be a problem with how much water is going through the boiler? Any suggestions as to what my next steps to either fault finding or fixing might be?
I am a reasonably competent amateur in terms of the nuts and bolts of pipes and taps etc, but I'm definitely a rooky when it comes to this end of things so any hints and tips as to what to do next would be gratefully appreciated.
I'm not afraid to call in a grown-up if I have to, but I like to have a bit of a bash first myself!
Details:
Cold tap will do 2 litres in 10 secs
Hot tap will do 2 litres in 16 secs
Combiboiler is Worcester Bosch 24i Junior
Would any other info help?
Many thanks for your time!