So I have been doing some experiementing and I still can’t work out what might be going on, but it has led to another question/ thought.
I have started leaving both the brew and service boiler switched on, so they both come on with the timer plug.
Brew and Service boiler come on
I have noticed the service boiler does overshoot a little when first heating up. I need to ask ASC if this is intended.
After approx. 20mins I vent the steam wand for a few seconds
Service boiler temp drops more than normal - down to maybe 122 degrees (according to the display, acknolweding the actual temp might not be the same)
Machine normally then gets left for another 25mins or so before I make the drinks
On the face of it, everything looks to be opperating normally - but, the milk just isn’t steaming the same way.
I have previously always struggled not to over steam milk with the 2-hole steam tip.
At the moment, I am struggling to get much more than hot milk - no thickening/ aeration seems to take place and I don’t get the same volume increase that I used to. I get to/ past the LH MJ test in a similar time, so the heat seems to be there.
I did swap to the three hole steam tip that I have got and it pretty much blew the milk out the pitcher (190ml milk in a 350ml pitcher) - very frothy milk (massive bubbles), but doesn’t tell me much about what might be going on.
I switched back to the two hole and the story was the same - hot but thin milk.
I am going to take the case off and have a look inside.
Should I take the steam want off and check for blockages? Could a blockage cause this?