No HW or intermittent HW

[stewh]

Hi Guys,
I have a Jaguar 28 KW combi-boiler that has just developed a problem with the DHW. i.e. with the CH off the DHW remains cold , burner doesn't come on.
If the CH is on then I get luke-warm DHW only or very occasionally hot water. There is plenty of pressure from the cold water supply (estimate around 2.5 Bar). The CH works normally & there are no error messages displayed at any time.
How can I tell if the water flow sensor is working & how can I override the sensor temporarily to make sure that the 3 way valve is working?

Regards, Stewart

 

[Rob]

Diaphragm. Try a search on the forum

 

[stewh]

Thanks for the reply Rob. Is the diaphragm in the 3-way valve or the flow sensor?

Stewart