DavecUK Thanks Dave, sorry for slow reply.
DavecUK This bit is confusing because it uses steam pressure to get the water out, so by definition, it would have to be in excess of 100C??, and the water would feel boiling hot. Try boiling a kettle, filling a mug of water and dipping your finger in it, would you class that as hot, or **** that’s hot? This gives me some context.
I will stick my finger in some boiler water tomorrow - been a bit hot (and busy!) today.
This is also the crux of my bafflement with the issue. Heating element at the bottom, hot water comes from the bottom, steam comes out the top, but it simply isn’t ‘boiling’ hot.
I am going to get a kitchen thermometer so I can test it the next time it happens.
DavecUK Your next bullet says pump runs service boiler fills…was this pump running while you were drawing water, I ask because it’s not possible to draw 500g without activating the pump, or shouldn’t be?
The pump did start running whilst I was filling. This is why I was confused the temperature didn’t drop on the display. I waited until the pump stopped filling before I opened the steam valve, but the temp hadn’t dropped.
DavecUK Above are the things I’m thinking about and I can’t seem to make sense of the problem, in those thoughts might be some clues to help you remember something, or notice something you didn’t perhaps realise might be important.
All noted, thank you. I will also set the service boiler to 105 and see what happens.
On the vacuum breaker point, I will have to take the top off and watch whilst it heats up to see what’s going on.
DavecUK Because it did an autofill with cold water.
Yes, absolutely - my observation here was that the display temp didn’t drop until after I’d opened the steam valve, even though the pump had run and filled the boiler - as if opening the steam valve jolted something and got everything working/ going again.
I’ve not had the service boiler on today, but will do tomorrow.