DavecUK to bottom out down a few things
The “apparent leak” from the thermal sensor is not a leak, water has got in there from the top…it’s a potted thermowell so will have no effect on the sensor and will eventually evaporate away. if you saw the construction, you would realise they cannot leak. (non issue)
The safety valve will most likely be fine after the over pressure event
The over pressure event was cause by the pump not stopping during the autofill.
True, otherwise, the steam boiler wouldn’t have held the 125C from cold (after the over-pressure leak from the safety value). Please see the YT Video.
Yeah, as I said earlier, the pump didn’t stop filling.
The exact sequence of the events in the last 3 days are as follows:
Day 1:
That over-pressure leakage was from steam boiler. Please see the YT video. The sequence of events are as follows :
No water sign - AL 11. Filled the tank, saw the tank empty re-fill sensor was disconnected. Fixed it.
Refilled - continuous and pump did not stop. Did the fill-probe sensor fail or did something else (like the board-wild guess) fail?
Puff from steam from steam boiler (safety value), water dripped continuously, mini flood and a tad bubble from temp sensor (2 red thin wires)
Allowed the machine to cold. Let the air out from tap and steam arm. Fired all the boilers.
Stuck coffee shot was completed. Coffee was sinked.
Drew 3-4 mugs of water from steam boiler. No refill.
Day 2:
Opened the tap and steam tip to let any air out. Brought the machine alive - all boilers.
Opened the tap and steam for 10s. The boiler filled. Increased the steam boiler temp to 125C. Drew water out from the tap. The steam boiler filled.
The display exhibited the following strange behaviour before going black
Group 94, Brew 100, Steam 125
Group —, Brew —, Steam —
Black sceeen.
Switched off and tried again. No display.
Kept the power on, drew water from the tap with no display. No refill.
Another separate issue is when I take the float valve from the tank, I do not get AL11. This was even before the display incident.
Day 3 (Today)
Power on, no firmware, blank screen. Fuses were checked as requested by Paolo. Shared the photo with him. Ordered multi-meter as he wanted to check a few things. Great and timely assistance, as usual, from ACS.
To summarise:
I think the float valve with two wires in the tank is perhaps dodgy.
Board - may be
Display - may be
Fill probe on the steam boiler - may be
Anything else, I am not sure. 😊
