F1 wrote:It turned out to be lube or lack thereof. I unscrewed the mushroom and put a tiny bit of lube on the brew valve tip only. It's been a week and about 20 shots later no chirping sound.
Thanks for the followup! Greatly appreciated!
There's nothing more aggravating than a thread discussing a problem that goes dead (assuming this occurs after the OP fixed the problem) but then never checks back in with what the solution was or if it the problem was ever resolved.
Krups, then Silvia, then Livia 90, then a Techno! Does it ever end? [sigh]