greenstar cdi issue

[nelly69er]

hi all,
i have a worchester bosch greenstar cdi boiler.
in the past couple of days ive had no hot water running even though when i run the hot water tap the thermostat on the boiler rises.
at the same time when ever the boiler is turned on the radiators automatically come on?

 

[45yearsagasman]

Could you translate. Your post is contradicting itself, and makes no sense.

 

[Boilerman2]

Are you saying that Cold water runs from the tap, but although the boiler fires and the THERMOMETER dispaly rises the tap still runs cold?

The Radiators are coming on while all this is going on as well?

DIVERTER VALVE FAULT!!

You need a RGI to take a look!!