Worcester 28si

[powerchoice]

Can anyone help with a hot water problem to my Worcester 28si? The hot water is only getting luke warm. There are no fault lights on and the boiler fires when called on. The flow switch is fine but the red flow knob doesn't seem to make any difference to water flow when adjusted. Flow seems a bit high at about 11.5lts/min but temperature of the water doesn't alter much when basin tap is turned down to restrict flow. Any idea's? Thanks

 

[gremlin16]

water temp to low


Low gas pressure.
Stiff/sticking gas valve.
Stiff/sticking flow sensor.
Board fault.

 

[powerchoice]

hi gremlin. Thanks for the reply. I should have mentioned that the fault is somewhat intermittant. Every so often it will work ok. Central heating temp is fine too so can't see a problem with gas pressure. Flow sensor seems to rect well enough as well. Cheers