[Paulina]

Hi,

Did you get this resolved, I have exactly the same problem and tested lots of the probable causes.

Exact same fault – On startup a relay clicks 5 times which surges the lift pump each time. Then displays E90 which is a communication error.

I have replaced the lift pump, checked continuity on the pump and level sensor cables. Removed control board and re-coupled all connectors. Checked heater element. Cleaned both lint and moisture sensors.

At my wits end now, last chance is to try swapping the control board, but they are not cheap, so may be better just replacing with a new machine. 🙁

[Author]

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