What does Err4 mean on proline PFL510W-U1 washing machine

I get the code U1 on final wash cycle
What is the fix?

Could be several reasons:
- Selected the "Night cycle" program (means standing with the drum full of water, reason: too much noise in the spin cycle)
- Set to the "Rinse hold" (means standing with the drum full of water, reason: wrinkles on the clothes)

According to your description I think that this is not a failure otherwise error E20 will be appears on display.

Once the washing programme has come to an end, END illuminates on the programme progress display.
If RINSE HOLD was selected, the display beside the START/ PAUSE button flashes.
1. After a rinse hold, the water must first be pumped out:
- Either press the START/PAUSE button (the water is pumped out and the washing is spun according to the completed programme;
After the START/PAUSE button is pressed again, the spin speed can still also be changed during spinning), or
- Turn the programme selector to PUMP OUT and press the START/PAUSE button (the water is pumped out without spinning),or
- Turn the programme selector to SPIN or SHORT SPIN and press theSTART/PAUSE button (the water is pumped out and the washing is spun or gently spun).
At the end of this programme step, the END indicator will illuminate.
2. Open the door.
As soon as the DOOR indicator lights up green, the door can be opened.

Dado

I would suggest that you open and close the lid or check that the out of balance lever that activates the micro switch is in the correct position on the micro switch
if the machine has been tilted for carrying then the bowl will fall to one side and that lever may be disconnected from the switch or pressing on the switch as if unbalanced
first place to look

If I understand correctly there is blinking LED-s from "Prewash","Rinse Hold" and "End of cycle". In binary code it is fault E91 what means communications error between main PCB and display board.
So, could be: main electronic PCB, display board or wiring.

Dado

It means the washing cycle has come to and END.

L means "Lid or Door Lock" problem
r probably means 'release' I couldn't find it anywhere... so I'd guess that Lr means the machine did not detect that the Lid Lock released and cycle end (which means either the sensor is bad or the Lid Lock dosen't lock the Lid).

Either way, something with the Lid Lock system ais not right. Be glad it releases ;-)

Err1 : Door not properly shut
Err2 : Drainage error (clean filter check hose
Err3 : temperature sensor short circuit
Err4 : Heater error
Err5 : water fails to meet specified level within 8 mins check tap, water pressure
Err6 : motor error
Err7 : motor error
Err8 : water exceeds protective level check circuit
End : end of wash cycle
Unb : after the last rinsing cycle finishes spinning fails completelt due to unbalance of the laundry

only reason I know is i looked through the manual after getting it myself could be something to do with running a bath while washer on or something perhaps not enough water getting in if powder channel blocked

Hi Mate;

Just had the exact same problem with the spin cylec and now its stopped completely, I was getting ERR 7 on the display, its telling you that there is something wrong with the motor.checked the motor and found that one of the Carbon Brushes was sticking/Stuck, Just 2 phillips head screws and the carbon brush is out, mine had a bit of melted plastic/casing snagging the Carbon brush, i just jusd a bit of fine sand paper to clean the Brush, put it all back together and lo and behold everyting works.
Hope this helps

Listed below are all the error codes:

Display messages:
Err1: Error message. Door is not properly shut 20s after program is started.
Correction: Shut the door properly.
Err2: Error message. Drainage error, water not emptied within 4 min.
Correction: Clean the filter and check the drain hose for blockage. If error still exists, please contact the maintenance personnel.
Err3: Error message. Temperature sensor is not properly connected or damaged (display at the end of a program).
Correction: Contact the maintenance personnel.
Err4: Error message. The heater may be broken or the desired temperature is not met within the specified time due to an overloaded laundry (display at the end of a program).
Correction: Reduce the load and restart, or contact the maintenance personnel.
Err5: Error message. The required water level is not reached within 10 min, or the water level exceeds the protection value.
Correction: Check to see if the tap is turned on and the water pressure is correct. If error still exists, contact the maintenance personnel.
Err6: Error message. Motor speed error. It may be not properly connected or damaged.
Correction: Contact the maintenance personnel.
Err7: Error message. Motor overheat protection or is damaged.
Correction: Contact the maintenance personnel.
Err8: Error message. Water level exceeds protection value.
Correction: Contact the maintenance personnel.

Regards

Bull

it sounds like your control board