Isomac Tea/Rituale E61 random autofill
Hello. I just sold my Isomac Rituale E61 (almost identical to Tea), but the new owner complains it randomly autofills and doesn’t stop once it starts. Water comes out of the small angled outlet which is connected via hose to the vacuum breaker. I took it back and acid treated the boiler and level probe (as I thought it was getting wrong resistance between earth and level probe). I put 1.5L fresh water + 30g citric acid in the tank, removed the level probe cable so the pump filled the boiler until it was brimfull. I then reattached the level probe cable and let the boiler heat a bit, turned off the machine and opened the steam valve (to let out gas build ups). Left it like this for several hours. Then unscrew the brass pipes and drained it completely, then flushed several times with fresh water. I also cleaned the autofill PCB with electrical cleaner spray. I didn’t see any damage or strange things on the PCB.
I then left it powered for 12 hours straight (with a few brews during the day), with no autofill problems. I saw the pressostat kicked in at random pressures (some times did not turn off), so I replaced this with a new one. Handed it back to the new owner, but it started randomly autofilling again.
Anyone with the same experience? Was I just lucky when I tested it for 12 hours? Or could an earthing / grounding problem in his house cause it?
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