Zanussi Jetstream 1200 error code E90

I keep getting error code: E90 on my Zanussi Jetstream 1200, what does it mean & how do I rectify the fault?

Zanussi Washing Machine Error Codes

Most models with the single control/display (EWM1000) PCB.

*Note* these are the engineer codes displayed after entering the configuration/diagnostics mode.

To enter diagnostics:

1. Switch off the appliance.
2. Press and hold down START/PAUSE and any one of the option buttons simultaneously.
3. Holding down both buttons, switch the appliance on by turning the programme selector one position to
the right (clockwise).
4. Continue to hold down the START/PAUSE and option buttons until the LED begins to flash (at least 2
seconds).

In the first selector position, the operation of the buttons and the relative LEDs is checked; turning the
selector knob clockwise activates the diagnostics cycle for the operation of the various components and
displays any alarm conditions.

E11: Difficulty in filling during wash phase
E13: Water leakage.
E21: Difficulties in draining .
E23: Malfunction of drain pump triac.
E24: «sensing» circuit of the component (triac) that controls the drain pump faulty
E33: Incongruence between closure of anti-boiling and 1st level contacts of pressure switch
E35: Water level too high
E36: «sensing» circuit of anti-boiling pressure switch faulty
E37: «sensing» circuit of 1st level pressure switch faulty
E39: “HV” «sensing» circuit of anti-overflow pressure switch faulty
E40: Door open, Interlock, wiring or main PCB
E41: Door open
E41: Problems with aperture of door
E42: Problems with aperture of the door
E42: Problems with aperture of the door
E43: Problems with the triac which actions the door interlock
E43: Problems with the triac which actions the door interlock
E44: Door closure «sensing» circuit faulty
E45: Problems with the «sensing» circuit of the triac that actions the door interlock
E51: Motor power triac short-circuited
E52: No signal from the motor tachymetric genetaror
E52: No signal from the tachymetric generator
Procedure for checking commutator motors
E53: Problems with the «sensing» circuit of the triac which powers the motor
E54: Motor relay contacts sticking
E61: Insufficient heating during washing
E62: Overheating during washing
E66: The contacts of the heating element power relay are always closed
E71: NTC washing sensor faulty.
E82: Error in reading the RESET/OFF position of the programme selector.
E83: Error in reading the programme selector code
E93: Incorrect machine configuration.
E94: Incorrect configuration of washing cycle
E95: Communications error between microprocessor and the EEPROM
E96: Incongruence between control panel version and configuration data
E97: Incongruence between selector version and configuration data
EA1: Drum positioning system (DSP) faulty (top-loaders only)
EB1: Incorrect mains frequency
EB2: Mains voltage too high
EB3: Mains voltage too low

My machine is "push button" & not turn knob.

Maybe helpful if you post the

Model Number
PNC
Ser

Helps the engineers identify the control board you will have fitted then. Most error codes are common on AEG/Zanussi models throughout the ranges though.