Worcester Greenstar 28i no green ‘burner on indicator light’ flashing diagnostic light

[Mcp975]

Last night our combo boiler got turned off at the mains all night. We noticed this morning when we were all getting ready and plugged it back in.
There was no hot water or central heating, the pressure gauge had dropped way into the red, and the burner indicator light no longer came on green. We adjusted the pressure and it now reads between 1-1.5, but still no hot water or central heating. Have tried pressing reset button. Turning down dials etc.
The blue diagnostic light is flashing and the green light will not come on at all. No, hot water, no radiators

 

[EvilDrPorkChop]

Last night our combo boiler got turned off at the mains all night. We noticed this morning when we were all getting ready and plugged it back in.
There was no hot water or central heating, the pressure gauge had dropped way into the red, and the burner indicator light no longer came on green. We adjusted the pressure and it now reads between 1-1.5, but still no hot water or central heating. Have tried pressing reset button. Turning down dials etc.
The blue diagnostic light is flashing and the green light will not come on at all. No, hot water, no radiators

Known fault when power has been off for so long. You need to get a GSR engineer out to it, or Worcester with their one off call out charge.

 

[Burger]

Have you tried pressing the reset button for approx 5 seconds as described in the users manual?

https://www.worcester-bosch.co.uk/support/literature/download/release/6720806709/12644

 

[Mcp975]

Sadly I have. Nothing changes. Our reset button hasn’t flashed at all. Just the flashing blue diagnostic button.

 

[Burger]

Sadly I have. Nothing changes. Our reset button hasn’t flashed at all. Just the flashing blue diagnostic button.

Unfortunately then, needs a gas safe engineer as advised.

 

[firemant]

How is it flashing? fast / slow - mainly off or on

 

[Mcp975]

Just checked again and the blue diagnostic light had stopped flashing, and the eco light had come on!? Ran the hot tap to see if any change and the eco light went off and the blue diagnostic light started flashing again...

 

[Riley]

Need a gse