Model reference

Whirlpool MDB7979SHZ0

Dishwasher

1 document20 error codes3 service modes

Available documentation

Tech Sheet

Tech Sheet12 pg
Covers this model

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F1-E1 on my Whirlpool MDB7979SHZ0

M+

Control detected K1 pilot relay stuck

From Tech Sheet W11267826, p.38:

1.Access service mode to confirm the active fault code and read stored error history.

2.Measure control board supply voltage at test points. Expected: 12 VDC and 5 VDC.

3.Inspect all connectors on the main control for corrosion or backed-out pins.

Part WPW10804018

Electronic control board

Error codes (20)

CodeMeaning

F1-E1Control detected K1 pilot relay stuck closed.F1-E2Damaged or corrupted memory on control board; incompatible software components…F10-E1Dispenser electrical problem; loose connection in Dispenser circuit and/or open…F10-E3Drying fan error; loose connection in fan circuit and/or open fan motor.F2-E1Control detected stuck key(s) in keypad or keypad connection.F2-E2User interface cannot communicate with main control; loose user interface…F3-E1Open connector or component in Temperature Sensing circuit; open or faulty…F3-E2Shorted connection or component in Temperature Sensing circuit; incoming water…F3-E3OWI (Optical Soil Sensor) failure or failed calibration.F4-E3Wash motor not running; loose connection in Motor circuit and/or faulty wash…F5-E1Door was not latched within 4 seconds of pressing Start/Resume; loose…F5-E2Control programmed to not start if it suspects the door switch is stuck closed…F6-E1Low or no water to dishwasher (mechanical problem).F6-E2Fill valve electrical problem; loose connection in Fill Valve circuit and/or…F6-E3Suds or air detected in pump.F6-E4Float switch open; overfill switch stuck in overfill position and/or dishwasher…F7-E1No heat; control programmed to disable heater if it detects a water heating…F7-E2Heater stuck on; heater drive circuit on the control.F8-E2Drain motor electrical problem; loose connection in Drain Motor circuit and/or…F8-E3Drain motor stuck on; drain motor drive circuit on the control.

Service modes (3)

Clear Error HistoryDuring Service Diagnostics cycle interval 27 (10-second pause, Hi Temp LED will be on), press HI…
Rapid Advance (Customer Cycles)After starting a customer cycle, press HIGH TEMP
Service Diagnostics CycleWhile in Standby mode, press any 3 keys in the sequence 1-2-3-1-2-3-1-2-3 with no more than 1…

Full entry steps, exit procedures, and test sequences are available in Max.

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