WORCESTER 28I BOILER HOT WATER TEMPERATURE

[PHIL269]

My worcester 28i greenstar boiler hot water temperature is not as hot as it used to be.
start off hot then temp goes down.
Tried with central heating on or off but no different in hot temperature.
boiler temp on 4 out 6 but believe this doesnt affect hot water temp.
there is a eco button but not lit.
Tried repressurise to 1 bar but after a while goes below 1 bar when water\heating off,
only goes to 2 bar when heating on.
Any advice please.
Thanks
Phil

 

[boilerdoktor]

Phil it’s a combi, it heats up water coming in. Jan and Feb are always the worst. The boilers work on a 40 deg rise at the correct flow rate. So if your getting 9 litres a minute through the tap, and the cold inlet temp is say 7 degrees, if you get hot water at the tap of 47 degrees your boiler is doing its job even though it may not be satisfactory to you. So it seems a lot cooler than the summer time when the cold temp is 15 degrees.

 

[boilerdoktor]

Turn the tap down to half the flow rate....does that improve the temp ?