My Miele Dishwasher shows an error code F24 for the heater relay. Cleaning the heater relay now the dish washer displays the error code F51. I have Miele G1420 SC dish washer.

Pressure Switch sensing Julie. Bad news with that particular fault.

Fault Code F51 Pressure Sensor - Miele W1113 Technical ...

https://www.manualslib.com > ... > Technical information
Fault Code F51 Pressure Sensor - Miele W1113 Technical Information ... Water Intake Valve(s) close and the program automatically ends. The Drain Pump is activated ...

https://www.google.com/search?q=Fault+F51+in+Miele+dishwasher

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F24-Heater relay problems like contacts that have fused together, moisture in this part of the dishwasher, or a problem with the plug on the heater relay's exit point. ... This is often due to a faulty heater relay, problems with your NTC temperature sensor, or a closed heater relay.

Professional Miele Dishwasher Repairs

F24 is a lack of signal from the heater relay. At the start of a cycle the dishwasher runs the drain pump for 30 seconds. it will, at the same time send a power signal to the heater relay. if the computer doesnt see a signal back from the relay, it will stop the cycle and beep. Sometimes this happens almost as soon as you press the start button. Sometimes the relays are just bad, but it is usually caused by a voltage spike, or by using too much detergent. the excess detergent will oversuds the machine, and leak into the base pan. The relay is located in the base area so you will need to disconnect it from electric, drain and water supply and tip it backwards. Then remove the base and you should be able to find it - have towels to hand just incase there is a lot of water in the base - this is very important take pictures as you go along as diagrams for Miele products are almost impossible to get

Several questions on FIXYA in the past may be relevant, depending upon what happens before seeing the f51 code:


Posted on Jan 02, 2017

• 
  

  Ginko

  • 19396 Answers
  SOURCE:My dishwasher keeps telling me F51 cannot find
  On Miele F51 is pressure switch error.
  
  The pressure switch is located in the drain system. Its function is determining if there is water inside the tub.
  
  Trip the circuit breaker or disconnect the power cord for a couple of minutes. Inspect the drain system for blockage. The pressure switch can be tested by a technician bypassing it.
  
  To get parts or repair service, call the number listed on the user manual.
  
  Posted on Dec 19, 2009
  
  • 
    

    David

    • 177 Answers
    SOURCE:Miele Dishwasher does not start
    hi,
    
    F51 fault is more than likely the heater relay is faulty but it could be your circulation pump is jammed up. if you are confident you can easily replace the replace the relay if it is faulty. you would need to put a meter across the terminals. if it is ok then the pump is blocked. if you are not confident you would require a service call. Miele have there own deadicated service team if you live in a metro area
    
    hope this helps.
    Posted on Apr 25, 2010

It's sounds like it needs a new board replacement.

The Miele G5300sc Error F51 usually relates to the Heater Pressure Switch.

Remedy:
Replace the heater relay or heater pressure switch.

David: Try downloading this free user manual: http://laundry.manualsonline.com/manuals/mfg/miele/pw_6065.htmlk According to ApplianceHelponline.: " Heater pressure switch 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.

Background information:

Start position: One second after the program start, heater relay K1/1 is activated. This enables a check as to whether the contacts on heater pressure switch B1/13 have closed on switching steps 21/22 or 11/12.

Cause:
Heater relay defective; contact open.

Remedy:
Replace the heater relay.

Cause:
Heater relay solenoid defective.

Remedy:
Replace the heater relay.

Cause:
Connection from heater relay to electronic module open-circuited.

Remedy:

1. Check plug connections.

2. Check the connection wires for continuity.

Cause:
Heater pressure switch open- or short-circuited.

Remedy:
Replace the heater pressure switch.

Cause:
Connection from heater pressure switch to electronic open-circuited.

Remedy:

1. Check plug connections.

2. Check the connection wires for continuity.

Cause:
Foreign objects in heater pressure switch.

Remedy:
Replace the heater pressure switch."

Hi

Intake/Drain light flashing means an issue while draining. The dishwasher is not draining properly. Please check for air gap on the dishwasher is not clogged. It prevents dishwasher from draining properly and sometimes the drain flow is restricted due to gunk. Cleaning or bypassing the air gap will resolve the issue. If this doesn't resolve the issue then it is due to seized (or stuck) drain pump. Keep handy large bowls and towels to soak the water out. Disconnect the power to the dishwasher or turn off the breaker to the dishwasher. Tip machine on its back; remove screws that hold the bottom tray on. Remove the hoses to the main motor, remove electrical connections and switch it on. If the error still appears then turn the rotary selector switch to "Stop/End" or press the "Start/Stop" switch for approx. 5 secs to cancel the error message. Switch the appliance off and then back on again. Hope this helps...please post back for further assistance.

Daniel

f24 is no signal from the heater relay. at the start of a cycle the dishwasher runs the drain pump for 30 seconds. it will, at the same time send a power signal to the heater relay. if the computer doesnt see a signal back from the relay, it will stop the cycle and beep. Sometimes this happens almost as soon as you press the start button. Sometimes the relays are just bad, but it is usually caused by a voltage spike, or by using too much detergent. the excess detergent will oversuds the machine, and leak into the bottom pan. the soap will corrode the contacts on the relay and cause the f24 fault. the relay can be accessed by removing the bottom pan of the dishwasher with 4 t20 screws. it requires that the dishwasher be turned on its side.

hi,

F51 fault is more than likely the heater relay is faulty but it could be your circulation pump is jammed up. if you are confident you can easily replace the replace the relay if it is faulty. you would need to put a meter across the terminals. if it is ok then the pump is blocked. if you are not confident you would require a service call. Miele have there own deadicated service team if you live in a metro area

hope this helps.