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Bosch SN26M298eu/70 Dishwasher: Understanding Error E31 and Heating Issues

euro2L 29499 9
Best answers LABEL_AI_GENERATED

Why does a Bosch SN26M298eu/70 dishwasher stop heating and end with error E31 even though the heating elements measure about 30 Ω and the wash cycle still runs?

E31 is likely caused by the control board detecting a problem with the circulation pump, and it blocks heating when that happens [#16033141] In this model the pump/heater assembly may be at fault even if the heater resistance looks normal, so the pump and heaters should be checked for leakage [#16033570] A worn circulation pump, including failing bearings, is also a plausible cause of the reduced pump performance behind the error [#16064346] The fact that a rinse program without heating finishes normally suggests the fault only appears when the machine tries to heat and load the pump/heating circuit [#16033318]
AI summary based on the discussion. May contain errors.
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  • #1 16025888
    euro2L
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    Hello
    Dishwasher as in the subject. Dishwasher draws water, washes, releases water and at the end gives an error E31 , and does not heat, and the heaters both work. Nothing can be seen on the module clean as a tear.
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  • #2 16026158
    TONI_2003
    Moderator  
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    euro2L wrote:
    Dishwasher draws water, washes, discharges water and at the end gives E31 error
    Bosch SN26M298eu/70 Dishwasher: Understanding Error E31 and Heating Issues .
  • #3 16026166
    euro2L
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    Hello
    Strange issue because it washes rotates propellers


    Added after 1 [minute]:

    You can hear the water banging against the walls
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  • #4 16033000
    euro2L
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    Does not heat the Heater neither washing nor drying although both efficient resistance of about 30Ω.
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  • #5 16033141
    widaw
    Level 17  
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    Since the controller receives information that the circulating pump can not cope - it blocks heating. Check the tacho of the motor, the magnet, if it is in this model.
  • #6 16033318
    euro2L
    Level 41  
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    This model does not have a pump with a tacho
    The washing pump is together with the heater and has a second heater for drying
    Wondering why it does not show E09 if it does not heat on washing only gives E31 at the end of washing
    If I set the program to rinse without heating it goes to the end without showing an error
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  • #7 16033570
    widaw
    Level 17  
    Posts: 275
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    I wish you had written this in your first post. I would check the heaters and the pump for leakage.
  • #8 16034217
    euro2L
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    The drift is massively lacking
  • #10 16269513
    euro2L
    Level 41  
    Posts: 6954
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    Rate: 569
    The dishwasher went on Organ Dose
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Topic summary

LABEL_AI_GENERATED
The Bosch SN26M298eu/70 dishwasher is experiencing an E31 error at the end of its wash cycle, indicating a heating issue despite both heaters functioning correctly. The user notes that the dishwasher draws and releases water, and the washing pump is integrated with the heater. Responses suggest checking for pump leakage and the condition of the pump bearings, as the controller may block heating if it detects issues with the circulating pump. The model lacks a tacho for the pump, which complicates diagnostics. The user also mentions that a rinse cycle without heating completes without errors.
AI summary based on the discussion. May contain errors.
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