Difficult to asses a 'squelchy' noise. Can you make a video and post it ?

 

I have uploaded the video (including the entire startup) here

Key points:

• ~7:00 boiler reached 70C
• after 7:00 the sound is already audible
• 10:46 boiler reached 92C (operational temp) - squelchy noise present
• 11:00 close-up
• 11:12 draw water (to compare sound / loudness)
• 11:19 squelchy noise still present... as long as machine is on!

Any tips appreciated!

 

That sounds like a valve / solenoid allowing water/ steam to creep past.
Is there a continuous drip / dribble into the drip tray ?
Is the anti -vac valve allowing steam / air to escape--dripping into drip tray ?
Have you had the M/ch open to check for steam leaks or dribbles inside?

 

Is there a continuous drip / dribble into the drip tray ?

I see no continuous drip nor dribble into the drip tray (neither from the head, nor the steam or hot water tap)

Is the anti -vac valve allowing steam / air to escape--dripping into drip tray ?

I see no signs of steam or air (besides the sound) escape--dripping into drip tray currently. Any thips on how to further asses this?

Have you had the M/ch open to check for steam leaks or dribbles inside?

Not yet, but I plan to check it. I'll update the thread once I open the machine to check for steam leaks or dribbles inside. One note here: if this would happen, I assume I should already see water dripping around the bottom of the machine, which does not happen currently.

Will keep you posted!

 

I see no continuous drip nor dribble into the drip tray (neither from the head, nor the steam or hot water tap)


I see no signs of steam or air (besides the sound) escape--dripping into drip tray currently. Any thips on how to further asses this?


Not yet, but I plan to check it. I'll update the thread once I open the machine to check for steam leaks or dribbles inside. One note here: if this would happen, I assume I should already see water dripping around the bottom of the machine, which does not happen currently.

Will keep you posted!

Not necessarily , with small escapes steam or water, with hot surfaces S + w can evaporate quite quickly.
When you open it check for staining and discoloured areas particularly around pipe fittings/ joints also around sol- valves