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Whirlpool AWO / C 61010 - does not start, shows error F12 despite replacing the

Snatch84 16173 19
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Why does a Whirlpool AWO/C 61010 washer show F12 and stop even after I replaced the heater with its sensor?

The most likely cause is the heater relay on the control module/programmer, not the heater itself, and replacing that relay fixed the washer in this thread [#16936698] [#16936714] [#16944055] F12 is a heater circuit failure, so the controller is seeing a problem somewhere in the heating circuit [#16936414] Since the machine even boiled water, the heater was probably still working, which points more toward the relay or control side than the heating element [#16936351] [#16936388] The relay is on the module/programmer, usually a rectangular part next to the heater connector; in this case it was described as a 6-pin relay [#16936714] [#16936757] [#16936765] Also check the heater continuity, earth leakage, resistance, and all wiring/connectors between the heater and the main board [#16936414]
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  • #1 16936059
    Snatch84
    Level 7  
    Posts: 27
    Rate: 15
    She did not finish washing, showed the error as in the movie F12 and almost boiled water. I bought a new heater with a sensor, I replaced and continue the same. Everything is well connected. Pull the programmer or something else can be?
    [Film: dc66c2fee0] https://filmy.elektroda.pl/14_1515090860.mp4 [/ film: dc66c2fee0]
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  • #2 16936340
    irek19
    Level 33  
    Posts: 1566
    Help: 238
    Rate: 273
    Heater supply voltage
  • #3 16936351
    h jaworski
    Home appliances specialist  
    Posts: 4786
    Help: 466
    Rate: 716
    When boiled water it means that the heater was good because a broken heater does not heat the water. As something spoiled is a temperature sensor, and you already have to buy the right one with the right parameters, and it varies when buying. Check the resistance of your sensor at a temperature of e.g. 20 ° C and provide.
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  • #4 16936388
    Piotr2608

    Level 41  
    Posts: 5372
    Help: 849
    Rate: 4473
    h jaworski wrote:
    a broken heater does not heat the water
    - a broken heater can also boil water.

    Pull out the programmer and start with the heater relay - it looks as if it was glued.
    Company Account:
    ZimTech Piotr Zimny
    Przy Bażantarni 13/31A, Warszawa, 02-793 | Tel.: 666-XXX-XXX (Show) | Company Website: https://zimtech.com.pl
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  • #5 16936403
    irek19
    Level 33  
    Posts: 1566
    Help: 238
    Rate: 273
    All this is done on macajewa a little lime. You need to take measurements
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  • #6 16936414
    Piotr2608

    Level 41  
    Posts: 5372
    Help: 849
    Rate: 4473
    irek19 wrote:
    To wszystko na macajewa jest robione taka trochę lipa. Trzeba zrobić pomiary

    Pomiary czego niby? Dwie grzałki ten sam objaw. Po co Ci pomiary?

    F12 Heater circuit failure
    This error code is displayed when the main control unit detects an error
    somewhere on the heating circuit, usually a short circuit in this case.
    · Check water heating element for continuity
    · Check water heater for earth leakage
    · Check heater resistance
    · Check all wiring and connectors to the heater and from there to the main
    controller
    · Check main control unit
    Company Account:
    ZimTech Piotr Zimny
    Przy Bażantarni 13/31A, Warszawa, 02-793 | Tel.: 666-XXX-XXX (Show) | Company Website: https://zimtech.com.pl
  • #7 16936427
    irek19
    Level 33  
    Posts: 1566
    Help: 238
    Rate: 273
    F12 Heater circuit failure
    This error code is displayed when the main control unit detects an error
    somewhere in the heating circuit, usually a short circuit in this case.
    ? Check the water heating element for continuity
    ? Check water heater for ground leakage
    ? Check the heater resistance
    ? Check all cables and connectors to the heater and from there to the main heater
    controller
    ? Check the main control unit

    What does it check with the language?
  • #8 16936678
    Snatch84
    Level 7  
    Posts: 27
    Rate: 15
    I found soothed 2 diodes and the LNK304PN system is it responsible for the heater?
  • #9 16936694
    Piotr2608

    Level 41  
    Posts: 5372
    Help: 849
    Rate: 4473
    Snatch84 wrote:
    I found soothed 2 diodes and the LNK304PN system is it responsible for the heater?

    No, brush it out with a brush. Replace the relay or check the heater relay.
    Company Account:
    ZimTech Piotr Zimny
    Przy Bażantarni 13/31A, Warszawa, 02-793 | Tel.: 666-XXX-XXX (Show) | Company Website: https://zimtech.com.pl
  • #10 16936696
    zhudomel
    Home appliances specialist  
    Posts: 4991
    Help: 1279
    Rate: 3358
    Snatch84 wrote:
    I found sooty
    Not smoked, only dusty; Vacuum.
    Snatch84 wrote:
    is it responsible for the heater?
    No.
  • Helpful post
    #11 16936698
    zibi1971
    Home appliances specialist  
    Posts: 972
    Help: 262
    Rate: 1117
    Hello
    Start by changing the relay once it boils water. Error F12 is most often associated with it. Do not search and do nothing but do what I wrote to you.
  • #12 16936705
    Snatch84
    Level 7  
    Posts: 27
    Rate: 15
    where's the relay near the heater somewhere?
  • Helpful post
    #13 16936714
    Piotr2608

    Level 41  
    Posts: 5372
    Help: 849
    Rate: 4473
    On the module, programmer. Take a picture and I'll show you.
    Most often rectangular, soldered next to the 4-pin connector for the heater.

    Whirlpool AWO / C 61010 - does not start, shows error F12 despite replacing the
    Company Account:
    ZimTech Piotr Zimny
    Przy Bażantarni 13/31A, Warszawa, 02-793 | Tel.: 666-XXX-XXX (Show) | Company Website: https://zimtech.com.pl
  • #14 16936724
    Snatch84
    Level 7  
    Posts: 27
    Rate: 15
    Whirlpool AWO / C 61010 - does not start, shows error F12 despite replacing the

    Added after 8 [minutes]:

    ok thanks after desoldering 4 pins come out lightly? is he still holding something there?
  • Helpful post
    #15 16936757
    zhudomel
    Home appliances specialist  
    Posts: 4991
    Help: 1279
    Rate: 3358
    Snatch84 wrote:
    4 pins
    Six.
  • #16 16936764
    Snatch84
    Level 7  
    Posts: 27
    Rate: 15
    ok thanks gentlemen I will answer in a few days how it will work or will not work
  • #17 16936765
    Piotr2608

    Level 41  
    Posts: 5372
    Help: 849
    Rate: 4473
    zhudomel wrote:
    Six.

    4 pins - I was talking about the connector of the heater. The relay has 6 pins :)
    Company Account:
    ZimTech Piotr Zimny
    Przy Bażantarni 13/31A, Warszawa, 02-793 | Tel.: 666-XXX-XXX (Show) | Company Website: https://zimtech.com.pl
  • #18 16936830
    Snatch84
    Level 7  
    Posts: 27
    Rate: 15
    The symbols match, but it has more pins in the picture than the one I have.
    :arrow: link
  • #20 16944055
    Snatch84
    Level 7  
    Posts: 27
    Rate: 15
    Piotr2608 wrote:
    You can buy the relay in the first (good) electronics store. link
    I live in Germany - that's why ;) but yesterday a friend was traveling from Poland, he already bought it for me in the store today, I set up a washing machine and hula :D thank you all for your help.

    My wife still wanted to clean the powder container, i.e. I removed the drawer and now I want to fold it, I saw from the side there is a hole, I think I lost something because there will be water spilling out ... Should I just blind something?
    Whirlpool AWO / C 61010 - does not start, shows error F12 despite replacing the
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Topic summary

✨ The Whirlpool AWO/C 61010 washing machine is experiencing an F12 error, indicating a heater circuit failure. The user replaced the heater and sensor but continues to face the same issue. Responses suggest checking the heater relay, ensuring proper connections, and verifying the temperature sensor's resistance. The F12 error typically arises from a short circuit in the heating circuit, necessitating checks on the water heating element, wiring, and the main control unit. The discussion also includes guidance on locating and replacing the relay, which is often the cause of the problem. After obtaining a new relay, the user successfully repaired the washing machine.
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FAQ

TL;DR: Whirlpool AWO/C 61010 error F12 points to the heater circuit. There are 5 checks, and “F12 Heater circuit failure” is the key clue. Start diagnosis at the control‑board heater relay. [Elektroda, Piotr2608, post #16936414]

Why it matters: This FAQ helps DIYers quickly confirm an F12 heater‑circuit fault and fix no‑start/overheating without replacing good parts.

Quick Facts

What does Whirlpool error F12 actually mean?

F12 means the control unit detected a heater circuit fault. Check the element continuity, insulation to earth, resistance, harness/connectors, and the controller. These five checks isolate shorts, open circuits, or control faults that prevent safe heating and program start. [Elektroda, Piotr2608, post #16936414]

Why did my washer nearly boil water before showing F12?

A stuck ("glued") heater relay can hold the heater on, overheating water, then triggering F12. Pull the programmer (control module) and start diagnostics at the heater relay. Replace it if contacts are welded or the relay is shorted. “Start with the heater relay.” [Elektroda, Piotr2608, post #16936388]

What solved the issue in the forum thread?

The owner replaced the heater relay on the control board. After refitting the module, the washer started and completed cycles normally. This confirms a control‑side switching failure rather than a bad element or sensor. [Elektroda, Snatch84, post #16944055]

Where is the heater relay and how do I recognize it?

It sits on the main control module (“programmer”). Look for a rectangular relay near the heater’s 4‑pin board connector. Photograph the board before work to note orientation. Comparable relays share similar footprints across Whirlpool modules. [Elektroda, Piotr2608, post #16936714]

Does the LNK304PN chip control the heater?

No. The LNK304PN is part of the low‑voltage power supply. Dusty or darkened diodes nearby often just need cleaning. Heater switching is handled by the dedicated relay, not the LNK304PN. “Not smoked, only dusty; vacuum.” [Elektroda, zhudomel, post #16936696]

How many pins does the heater relay have on this board?

Six. When desoldering, expect six through‑hole pins for the relay package. Clear all solder fully to avoid pad lift and ensure a flush replacement. [Elektroda, zhudomel, post #16936757]

What measurements should I take to confirm F12 causes?

Perform five checks: element continuity, insulation to earth, resistance value, wiring/connectors from element to controller, and controller output. These measurements separate load faults from control faults quickly. [Elektroda, Piotr2608, post #16936414]

How do I replace the heater relay (3 steps)?

  1. Isolate power, remove the programmer, and photograph the board.
  2. Desolder the 6‑pin heater relay and clean through‑holes.
  3. Fit an equivalent relay, solder, inspect joints, reassemble, and test. “Start by changing the relay once it boils water.” [Elektroda, zibi1971, post #16936698]

Should I replace the temperature sensor or heater first for F12?

If water overheats, suspect a stuck heater relay before replacing sensors. A welded relay can power a good heater continuously. Begin at the module and verify the relay contacts and drive. [Elektroda, Piotr2608, post #16936388]

How do I check heater supply voltage safely?

Measure AC supply at the heater terminals during a heat phase, using insulated probes and proper PPE. Unexpected live voltage with the relay commanded off indicates a stuck relay. Work only on isolated equipment. [Elektroda, irek19, post #16936340]

What does a “glued” relay mean in this context?

“Glued” means the relay contacts are welded or stuck closed. The heater remains powered regardless of controller commands, causing overheating and F12. Replacement is the remedy. [Elektroda, Piotr2608, post #16936388]

I replaced the heater and sensor, but F12 remains—what now?

That happens when the control‑board relay is the true fault. Replacing good load‑side parts will not clear F12 if the relay contacts are stuck or the relay drive fails. [Elektroda, Snatch84, post #16936059]

Is the heater connector really 4‑pin while the relay is 6‑pin?

Yes. The heater harness uses a 4‑pin board connector, while the heater relay on the PCB uses 6 pins. Do not confuse the two when tracing the circuit. [Elektroda, Piotr2608, post #16936765]
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