ravenheat rsf84e boiler DHW problem

[philmorgan]

my ravenheat rsf84e boiler has been fitted for around 4 years, over that period i have changed both thermistors and dhw sensor. it has just started with a new problem, when i run the dhw it takes ages to come through hot, the boiler seems to fire up ok, but maybe not fully. central heating is ok etc. i have checked usual things, water pressure, flow etc,, any ideas

 

[Rob]

Feel the heating pipes underneath the boiler when cold. If one of them starts to warm up after you turn the tap on then your losing power to heating circuit.

 

[philmorgan]

Feel the heating pipes underneath the boiler when cold. If one of them starts to warm up after you turn the tap on then your losing power to heating circuit.

hi, do you mean turn off central heating and then try as you suggest,, thanx

 

[Rob]

Yes the heating needs to be cold obviously otherwise you wont notice if its starting ot heat up!