Error code reference
Whirlpool Dishwasher Error Code U1
Machine failed to prime with water within a given time, usually because the tap has not been turned on.
Machine failed to prime with water within a given time, usually because the tap has not been turned on.
First step from the service manual
1
Check if the tap is turned on.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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U1 on my Whirlpool WDT730PAHZ
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Machine failed to prime with water within a
From Tech Sheet W12674244, p.16:
1.Check if the tap is turned on.
2.Measure control board supply voltage at the test points. Expected: 12 VDC and 5 VDC; a drop below 4.75 VDC on the logic rail points to a failed onboard regulator.
3.Inspect all connectors on the main control for corrosion, thermal stress, or backed-out pins. Reseat each connector with the power disconnected.
Part WPW10804018
Electronic control board
Related Whirlpool dishwasher codes
All Whirlpool dishwasher codes →- 1-1Stuck key detected in keypad or keypad connection…
- 1-2Stuck key or short circuit(s) detected in keypad or keypad…
- 1-3Control detected stuck key(s) in keypad or keypad…
- 10-1Dispenser electrical problem; loose connection in Dispenser…
- 10-2Vent wax motor electrical problem
- 10-3Drying fan error (on models with fan)
- 12-1No communication between ECM and Appliance Control Unit…
- 12-2No link between ECM and wireless router
View all 137 Whirlpool dishwasher codes
- 12-3No link between ECM and Internet
- 12-4Antenna A problem
- 12-5Antenna B problem
- 12-6Current Transformer A problem
- 12-7Provisioning problem
- 2-1Control detected stuck key(s) in keypad or keypad connection
- 2-2Control detected stuck key(s) in keypad or keypad connection
- 3-1Thermistor/OWI temperature sensing circuit open
- 3-2Thermistor/OWI temperature sensing circuit shorted
- 3-3OWI calibration failure
- 3-4OWI failed calibration
- 4-1Wash motor no communication
- 4-2Wash motor stuck key detected
- 4-3Wash motor not running due to loose connection in Motor…
- 4-3 (cause 2)Control Motor Drive circuit or Sense circuit failure…
- 4-4Wash motor failure
- 4-5Control detected diverter disk in sump is missing (Disk…
- 5-1Door was not latched within 3 seconds of pressing…
- 5-2Door stuck closed
- 5-5Door switch(es)
- 6-1Low or no water
- 6-10Water tank valve stuck open mechanically or electrically…
- 6-2Inlet water
- 6-3Suds/air in pump
- 6-4Float switch open; overfill switch stuck in open position…
- 6-5Fill valve triac on control shorted, fill valve…
- 6-6Inlet water
- 6-7Flowmeter problem
- 6-8Water softener regeneration valve electrical problem
- 6-9Water tank valve not functioning; loose connection and/or…
- 7-0Flow meter disconnected or damaged.
- 7-1No heat
- 7-1 (flowmeter)Disconnected or damaged flowmeter.
- 7-2Heating element stuck in active mode
- 7-7Flowmeter problem
- 8-1Slow drain
- 8-2Drain motor electrical problem
- 8-3Loose connection in Door Switch Circuit and/or door switch…
- 8-3 (stuck on)Drain stuck on
- 8-4Drain motor electrical problem; loose connection in Drain…
- 8-5Drain motor electrical problem
- 9-1Diverter can't find position
- 9-2Diverter stuck on
- 9-3Diverter
- 9-4Lower spray arm error
- 9-5Leak detection
- E1Water inlet failure
- E3Heater failure
- E4Overflow
- E5NTC open circuit failure
- E6NTC short circuit failure
- E7NTC short circuit failure
- F0Soil detection sensor defective
- F0E1Load detected during the washer cleaning cycle
- F1NTC (Negative Temperature Co-efficient of Resistance)…
- F10E1Detergent dispenser electrical problem
- F10E2Vent linear motor electrical problem
- F10E3Drying fan error
- F10E4Diverter can't find positions (position optical sensor…
- F10E5Diverter leak (motor); corroded or loose connection in…
- F12E1Smart Grid
- F12E2Smart Grid
- F12E3Smart Grid
- F12E5Smart Grid
- F12E7Smart Grid
- F1E1CCU Error
- F1E2MCU Error
- F1E7Board thermistor open or shorted.
- F1E9WIDE File queue full.
- F2Water leak detected
- F2E0Keypad disconnected.
- F2E1Stuck key detected on user interface; a key appears stuck…
- F2E2User interface cannot communicate with main control; loose…
- F2E3Unsupported Cycle
- F3Heating system defective
- F3-E3OWI calibration failure; OWI failure or drain hose check…
- F3E0Main oven sensor open or shorted.
- F3E1Open or shorted connection or component in temperature…
- F3E2Short circuit in temperature sensing circuit
- F4Drain system defective
- F4E2Heater relay stuck open or heater element open; open…
- F4E3Wash motor not running due to loose connection in motor…
- F4E4Wash motor inoperative
- F5Spray arm blocked
- F5E0Door and switches do not agree (Clean mode
- F5E1Door Switch Error
- F5E2Door stuck closed
- F5E3Door Unlock Error
- F6Water tap closed
- F6-E4Float switch open
- F6E1UI does not get communication from main control; user…
- F6E10Water reservoir valve stuck
- F6E2Fill valve electrical problem
- F6E3Communication Error CCU to UI
- F6E7Flow meter disconnected or damaged.
- F6E8Electrical problem with regeneration solenoid valve; open…
- F6E9Water tank valve not functioning; loose connection in valve…
- F7Flowmeter defective
- F7E1No heat
- F7E2MCU Fault or Motor Overheat
- F8Incorrect water level in tub
- F8-E2Drain motor electrical problem
- F8E0Steam Inlet Valve Error
- F8E1No water to dishwasher; water supply off, kinked fill hose…
- F8E3Overflow Condition
- F8E4Overfill switch open; damaged harness, overfill switch…
- F8E5Fill valve stuck open
- F8E6Flow meter disconnected or damaged; control defaults to…
- F8E9Water reservoir valve inoperative
- F9Continuous water entry into tub
- F9E0Mis-wired house or range.
- F9E1Diverter valve cannot find its position
- F9E2Drain motor electrical problem; loose connection in drain…
- F9E3Diverter valve disc missing from tub bottom
- F9E4Lower wash arm error
- F9E5Diverter leak
- FAOWI (Optical Water Indicator) defective
- FBMDV (Diverter Motor) defective
- FCASA (Water Softener Electronics) defective
- FCE0No communication between ECM and Control (washer/dryer)
- FCE1No link between ECM and Wireless Router (washer/dryer)
- FCE2No link between ECM and Internet (washer/dryer)
- FCE3Antenna A problem (washer/dryer)
- FCE4Antenna B problem (washer/dryer)
- FCE5Current Transformer A problem (washer/dryer)
- FCE6Current Transformer B problem (dryer only, 240VAC…
- FCE7Provisioning problem (washer/dryer)
- Stuck KeyThe control detects that a key is stuck in the depressed…
- SUDSSuds detected
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