Tip & How-To about Miele Washing Machines

Miele W1613 Drain fault and code F51

My machine limped along for a few weeks with an intermittent drain fault and then threw in code F51 occasionally. The F51 code is a water inlet fault, suggesting that water isn't filling the drum to the correct level. Clearly the first thing you need to do with these faults is check the obvious.

Drain fault:
Is the drain hose and drain filter clear?
Does the pump sound like it's running?
Is water actually being emptied?
F51:
Is inlet water pressure ok?
Is the inlet water filter clear?
Is water actually filling the drum?

In my case there was no suggestion of an obvious fault. So what makes the machine think there's a problem with water entering AND leaving the drum? It's the water level pressure sensor. The sensor itself is at the top of the machine, but a pipe connects it (via a small plastic chamber) to the very bottom of the tub. Water entering the tub rises in the pipe, thereby altering the pressure of trapped air and telling the machine when to stop filling or draining.
After dismantling the machine and removing the big hose connecting the bottom of the tub to the pump the sensor pipe is visible through the hose hole, which is quite large. So this pipe is in a good spot for collecting gunge and if it gets blocked it's a problem. Clean it out with an old toothbrush or whatever, while trying not to push it further up the pipe.
You should get some compensation for this effort when you empty the coins out of the hose you removed!
So I said 'after dismantling the machine' like it was child's play. It is pretty easy actually.

Open the door. Disconnect power.
Start with the lid. Two screws at rear, one each side under screw covers. Grip lid at front and lift up. It can be a bit stuck so give it a tug.
Remove powder draw.
Lift control panel away from front panel and lay on top of machine. You don't need to disconnect anything. Now you'll see the top of the sensor pipe.
Remove drain filter to empty any water in the bottom hose.
Remove - two screws at the top of the front panel, two screws either side of the door lock, one screw just below the door.
Lift the front panel off of the retaining pegs and pull away as far as the door seal will allow. Pulling away the top of the sensor pipe gives a bit more movement.
Now you can either remove the door seal and take off the front panel, or do as I did, which is just move it slightly to the side, giving access to the screws of the left hand side panel. Remove all screws for the left panel and it's easy to get off.
Now you have good access to the pump and bottom hose. The bottom hose has two clips on the tub end, but only the top clip needs loosening to remove from the tub.
Remember to mop up any water from the bottom tray when finished or you'll get a flood fault.

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Miele washing machine W3725 is coming up with Technical fault F51 ?


F51: Pressure Sensor
Symptom
In the operating mode, the display indicates Technical fault.
The program is stopped, the water intake valve is closed, and the drain pump is
switched on for 120 seconds.
Cause
Electrical defect in analog pressure sensor (ADS). The values are out of range.
x
Note
The pressure sensor is integrated into the power/program electronic (ELP)

This will usually require a professional to repair.

Dec 10, 2016 | Miele Washing Machines

1 Answer

What is Technical Fault 51?


The most common reason for this code is :-

F51 error is caused by a faulty or blocked heater pressure switch. It is not a job for an unqualified person.

"The program is interrupted and the drain pump is operated. The display shows Technical fault F51. Call Service Department. The buzzer is activated for 2 minutes. "

Apr 14, 2015 | Washing Machines

1 Answer

what is f51


On some machines the F51 is a slow or long drain error. Possibly a clogged filter in the drain pump or a bad pump. You did not provide enough information for me to offer any more help. I do not know the washer type, manufacturer, age, or model.

Mar 11, 2015 | Washing Machines

1 Answer

whirlpool awm 8125 fault code F09 followed by FA


The drain pump runs constantly in an effort to drain the water. Unplug the washer and, if the washer is overfilled, check the water inlet valve assembly for proper shut-off of water flow. If the water inlet valve assembly is defective, replace it. If the washer is empty when this error code appears, replace the water-level pressure switch.

Dec 16, 2013 | Whirlpool AWM8143 Front Load Washer

1 Answer

water remains in machine. Machine stops after a minute or so and diplays F11.


F11 means Drainage fault.

Water present in appliance and is not being drained off. The display shows Drain fault F11. The buzzer is activated for 2 minutes.

Background information:
After each drain pump step, the circulation pump operates for 2 seconds and heater pressure switch B1/13 checks the water level. If it is too high (large quantity of residual water remaining in the cabinet), the drainage time is extended. If, after a further check, the water level is still too high, then the program is interrupted, the fault code is saved and the drain pump is activated. Fault code F11 is also registered if heater relay 1K1 is not activated after the fault code F51 register check; see Section 080-3.18. Drain hose kinked. Remedy: Check the drain hose for correct positioning.

Cause: Drain blocked.
Remedy:
1. Clean the on-site drain.
2. Check the sump drain.
3. Check the filters.
4. Check the heater pressure switch and replace it if necessary.

Cause: Ball in non-return valve in sump has not opened (e.g., jammed).
Remedy:
Clean the non-return valve in the sump or replace it if necessary. Cause: Foreign objects in the drain pump.

Remedy:
Clean the drain pump and its impeller.

Cause: Drain pump defective.
Remedy:
1. Check the voltage supply to the drain pump.
2. If correct voltage is present, check the drain pump motor winding.
3. Replace the drain pump, if necessary.

Cause: Foreign objects in heater pressure switch.
Remedy:
Check the heater pressure switch for blockages and correct switching point.

Cause: Heater relay defective. Heater relay (coil or contacts) becomes defective during the drainage step (after fault code F51 register check).
Remedy:
Replace the heater relay.


Hope this helps to solve it.

Jul 05, 2011 | Miele G2432SCISS Builtin Dishwasher

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