Electrolux esl6211lo beeping fault

Hi all,

I have had the dishwasher since I moved in 3.5yrs ago but recently hasn’t been performing a decent wash. Have used the desacler tablets and cleaned the filter but to no such luck. Serial number is 41274116.

The other day it started to beep halfway through the wash two beeps indicating it wasn’t draining properly but the machine was empty, I have opened it up and checked the pipe/ waste pump and there is no blockage and happy to pump out when manually triggering the leak float, with perfectly clear water coming out and no water leaking onto the internal tray.

Ran another cycle last night and now it has started beeping 4 times of which there isn’t a error code for. I have checked the pressure sensor and cleaned out the grease as I understand this can be a problem now when I switch the machine on the drain pump runs for about 1 min then start to beep 4 times again.

Any ideas would be greatly appreciated.