Fill tank warning preventing start-up

Home Forums COFFEE MACHINE REPAIRS Delonghi Coffee Machine Repairs Fill tank warning preventing start-up

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    I have 2 de Longhi Magnifica Cappuccino ESAM 3500S machines, one not working and the other just stopped working.
    Did appropriate tests and found recently deceased machine had faulty thermistor so I swapped the one from the other machine as it tested OK. All good and everything heated up and functioned well but the “fill tank” sign came on and prevented the machine from working.I swapped the sensor but no difference.
    When I’d re-attached the water sensor connector to the circuit board the pins appeared loose possibly due to my hard handedness so I re-soldered them but to no avail.
    Any ideas?

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