Is the boiler lit?
IF not the flueways are directly above the fire bed. Keep operating the clinker ejector until hopper is empty
The scraper head may have fallen through.
If you want to retain a post purge to prevent smells. I have a P P unit removed from a leaking boiler you can have for a sensible price,
I have retired so no use to me.
The diverter fails to H W supply ie No Heating.