Not sure whether to start a new thread, but I'll try jumping in here first as my issue started with a similar experience.
Two days ago, I was pulling some shots and it seemed my machine was choking out. This was surprising for the BDB but happened often with my old Gaggia Classic and I had been dialing in my grind recently, so I started stepping back the grind. After 4 double shots that all choked out, I finally realized it probably wasn't the grind and tried running a double shot without the portafilter in. There was nothing more than a few drips coming out of the brew head and I was unable to build any pressure with a backflush disc in.
For context: I had recently had an issue after a descale where my steam reservoir had somehow tricked itself to in self-preservation from overheating and I went through a whole process (maybe from Reddit?) to disconnect the sensor, force fill the steam boiler and then unplug, reconnect the sensor, plugged it in and allowed it to refill itself. It took a few tries but worked and I learned a lot about the new vs old descale recommendation as well as the machine itself.
So based on that, I drained out the brew boiler via the descale process and let it refill itself. Once it started refilling itself, the temp dropped down into the 160 degree zone and never regained temp, losing a few degrees actually (Traegar grill flashbacks...aghhh!). I decided to shut it down and let it cool off. After doing so, it now consistently is pumping itself full for inordinate amounts of time and never gets above 70 degrees, maybe 72 at most if it is left on and the whole machine warms up enough (which I am not continuing to avoid frying anything out).
I'm wondering if anyone has any advice on where to start when I open this thing up tonight? Brew head solenoid, brew boiler fuse, full descale cycle? Anything notable to look for? I'm not sure if this is a machine issue or if (based on the first choking process) if some bit of scale clogged a line and now nothing is getting into the boiler..? Any insight or advice would be greatly appreciated as a starting point. As the kind individual above said, I may put in a ticket but see what I can do until my return box arrives (been there, done that)
EDIT: I started a new thread but cannot delete this post. Sorry for the double post. A moderator can feel free to delete this, if appropriate.