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WASHER MAY NOT START OR RESPOND TO CONTROLS WHEN THE CONTROL MODULE HAS FAILED
Fisher & Paykel Module MC AquaSmart PH 7 120V service replacement; washer electronic control module/board 420579USP, Fixes Washer may not start or respond to controls when the control module has failed
Electronic control module for Fisher & Paykel AquaSmart washers. The module manages washer functions such as filling, washing, draining, spinning, drive motor, drain motor, and water valves. The original part 420579USP is documented as replaced by Fisher & Paykel part 421226USP.
Part 420579USPFisher & Paykel
Confirm your full appliance model number before ordering.
Is This the Right Part?
Part Number420579USP
🇺🇸 Matching U.S. Part Number421226USP
ManufacturerFisher & Paykel
Appliance TypeWasher
Part TypeModule MC AquaSmart PH 7 120V service replacement; washer electronic control module/board
✅ Cross Reference Information
Current Part Number420579USP
Common Symptoms
- Washer does not start or respond to control inputs
- Washer fails to fill, wash, drain, or spin
- Drive motor, drain motor, or water-valve operation may be absent or abnormal
- Control buttons may flash while the washer remains inoperative
Check Before Replacing
- Confirm the washer has power and that its circuit breaker or fuse has not tripped.
- Check whether the control panel responds consistently to normal button presses.
- Observe and record any displayed fault code before attempting service.
- Verify that water supply valves are open and that drain restrictions are not present before attributing a filling or draining problem to the module.
- Compare the installed module's part number and connector layout with the replacement part before installation; do not force connectors.
Pro Tip
Because the module controls several loads, a single symptom does not prove module failure; first rule out power, water-supply, drain, wiring, and individual component problems.
Part Details
Part Number420579USP
Part TypeModule MC AquaSmart PH 7 120V service replacement; washer electronic control module/board
ManufacturerFisher & Paykel
Appliance TypeWasher
Primary FunctionControls washer operations including filling, washing, draining, spinning, the drive motor, drain motor, and water valves.
Installation Notes
- Disconnect electrical power before servicing or installing the module.
- Use the appliance-specific service or installation documentation and follow its connector and configuration instructions.
- Confirm the replacement module is the correct version for the washer before connecting it.
- Handle the electronic board carefully and avoid contact with circuitry unless required by the service procedure.
- If diagnosis involves live voltage testing or configuration beyond normal connector replacement, use a qualified appliance technician.
Verified Compatible Models
WL26CW1-96215A, WL26CW1-96215B, WL26CW2-96114A, WL37T26CW2-96109A, WL37T26DW1-96125A, WL37T26DW2-96113A, WL37T26KW2-96104A, WL42T26CW1-96176A, WL42T26CW1-96176B, WL42T26DW1-96178A, WL42T26DW1-96178B, WL42T26KW1-96174A
Fitment reminder: Match the complete appliance model number, including suffix or revision where applicable, before ordering.
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