Kenmore 31633 (Top Load - Whirlpool-made) - Shift actuator failure Repair Guide

🔩 Shift actuator failure Repair Guide for Kenmore 31633 (Top Load – Whirlpool-made)

💡 Don’t panic! Shift actuator failure on your Kenmore 31633 (Top Load – Whirlpool-made) is a common issue that many DIY enthusiasts can fix themselves. This comprehensive guide will walk you through the repair process step by step.

📋 What You’ll Need

Shift actuator
Position sensor
Multimeter

⚠️ Safety First

Before you begin, always:

Unplug the washing machine from power
Turn off water supply valves
Allow the machine to cool down if it was recently running
Have a clean, well-lit workspace

🔧 Step-by-Step Repair Instructions

📝

🔧 Step 1: Grinding noise during mode changes

Plug in the dishwasher and open the door fully until it rests at approximately 45 degrees from vertical.
Pull out the lower dish rack completely and set it aside on your counter or floor.
Locate the spray arm assembly at the bottom center of the tub – this is the white or gray circular component approximately 12 inches in diameter.
Grip the spray arm hub in the center and rotate it counterclockwise while lifting upward to remove it from the mounting post.
Look into the sump area now visible beneath where the spray arm sat – you’ll see a cylindrical filter assembly approximately 4 inches tall.
Twist the cylindrical filter counterclockwise one-quarter turn and lift straight up to remove it, exposing the chopper blade assembly below.
Start a wash cycle by pressing the “Normal Wash” button once, then press “Start” – the unit will begin filling with water.
Listen carefully during the initial 60-90 seconds as the mode actuator motor engages – the grinding noise will occur during this period if the issue is present.
Press “Cancel/Drain” twice within 3 seconds to stop the cycle.
Observe the water level in the sump – if water reached approximately 2 inches deep, the fill cycle is working correctly and the grinding is isolated to the mechanical drive system.
Look at the white plastic mode shifter fork visible at the 9 o’clock position inside the sump area, approximately 3 inches from the left wall – check if the two prongs show white plastic shavings or stripped edges.
Rotate the central drive shaft clockwise by hand using the splined coupling – it should turn smoothly with only slight resistance; grinding or catching indicates worn cam surfaces or a damaged mode actuator gear.

🛠️ Step 2: Test actuator motor

Locate the ice maker actuator motor assembly at the upper left corner of the ice maker unit, approximately 2 inches from the left sidewall and 1 inch down from the top.
Identify the 4-wire connector plug attached to the actuator motor – you’ll see a white plastic housing with red, black, white, and yellow wires entering from the harness side.
Press the rectangular release tab on the connector housing and pull the male connector away from the female socket on the actuator motor.
Set your multimeter to DC voltage, 20V range.
Turn the freezer power back on temporarily while keeping the ice maker assembly exposed.
Touch the black multimeter probe to the black wire terminal in the connector and the red probe to the red wire terminal.
Observe the reading – you should see 12V DC when the ice maker enters its harvest cycle (approximately every 90 minutes during normal operation).
Turn the power back off at the circuit breaker.
Switch your multimeter to resistance (ohms), 200-ohm range.
Disconnect the actuator motor completely by removing the 2 mounting screws securing it to the ice maker housing using a Phillips #2 screwdriver.
Touch the multimeter probes directly to the two motor terminals on the actuator body itself (ignore the other two wires which connect to the position switch).
Read the resistance – a functional motor displays 200-400 ohms; readings showing “OL” (open line/infinite resistance) or below 50 ohms indicate a failed motor requiring replacement.
If the motor passes (200-400 ohms) but you received no voltage in step 7, the control board requires replacement instead.
If the motor failed (wrong resistance), order replacement part number W10822278.

⚙️ Step 3: Check position sensor

Locate the position sensor mounted on the left side of the motor assembly, approximately 2 inches above the drum motor mounting bracket.
Use a Phillips-head screwdriver #2 to remove the single mounting screw securing the position sensor to the motor housing.
Grip the sensor body and pull it straight away from the motor housing with steady pressure until the sensor releases from its mounting grommet.
Examine the white plastic connector attached to the sensor’s wire harness – you’ll see 3 wires: red, white, and black.
Press the locking tab on the connector with your thumb while pulling the connector apart to disconnect it.
Set your multimeter to the ohms (Ω) setting at 200 ohms range.
Touch one multimeter probe to the center terminal of the sensor and the other probe to either outer terminal.
Read the resistance value – you should see between 500-700 ohms. If the reading shows “OL” (over limit) or zero ohms, the sensor has failed.
Rotate the small plastic gear on the sensor shaft clockwise one full rotation while watching the multimeter reading.
The resistance should change smoothly as you rotate the shaft – fluctuations should range between 200-1000 ohms throughout the rotation. Sudden jumps to infinity or zero indicate internal sensor failure.
Inspect the sensor’s mounting grommet for cracks, tears, or hardening – the rubber should be pliable and intact.
Check all 3 wires where they enter the sensor body for cracks or exposed copper stranding.
If readings are within 500-700 ohms at rest and change smoothly during rotation, reconnect the white connector until you hear it click into place.
Reinstall the sensor into the motor housing grommet and secure with the mounting screw, tightening until snug but not overtightened.

🔩 Step 4: Replace actuator

Locate the ice maker actuator assembly on the left side of the ice maker compartment, approximately 3 inches from the top edge and 2 inches from the left wall.
Identify the white plastic actuator arm connected to a gray rectangular motor housing measuring roughly 2 inches by 3 inches.
Disconnect the wire harness by pressing the release tab on the connector with your thumb while pulling the connector straight away from the actuator body.
Remove the two Phillips-head screws (#2 screwdriver) securing the actuator to the mounting bracket – one screw positioned at the top of the housing and one at the bottom, spaced 2.5 inches apart.
Grip the actuator housing with both hands and pull it straight toward you to disengage it from the mounting clips located on each side of the bracket.
Position the new actuator (part number W10498261) by aligning the two side tabs with the corresponding slots in the mounting bracket.
Push the actuator firmly into the bracket until you hear two distinct clicks, indicating the side clips have engaged properly.
Insert and hand-tighten both Phillips-head mounting screws through the actuator housing into the bracket.
Tighten each screw using a clockwise motion until snug – approximately 8-10 inch-pounds of pressure – stopping when the screw head sits flush with the plastic housing surface.
Reconnect the wire harness by aligning the connector’s rectangular shape with the actuator port and pushing straight in until you hear an audible click.
Verify the actuator arm moves freely through its full range by manually rotating it counterclockwise 180 degrees and releasing – it should spring back to its original position within 1-2 seconds.
Check that the actuator sits flush against the mounting bracket with no visible gaps exceeding 1/16 inch around the perimeter.

📋 Step 5: Test agitate and spin

Plug the washer power cord back into the 120V wall outlet.
Turn the water supply valves clockwise to the open position – both hot and cold water lines at the wall connection points.
Open the washer lid completely until it rests against the rear panel.
Turn the cycle selector knob clockwise to the “Normal Wash” position – this is typically the third setting from the left on the control panel.
Pull the cycle selector knob outward approximately 1/2 inch until you hear a single click – this starts the fill cycle.
Watch the tub fill with water for 30-45 seconds until water reaches approximately 6 inches deep.
Push the cycle selector knob inward to stop the fill cycle.
Close the lid firmly until you hear it click into the latch mechanism.
Pull the cycle selector knob out again – the agitator should begin moving back and forth within 3-5 seconds.
Observe the agitator through the lid for a complete rotation cycle: it should twist approximately 180 degrees clockwise, pause for 1 second, then twist 180 degrees counterclockwise.
Count 10 complete agitation cycles to verify consistent movement without grinding noises or hesitation.
Push the cycle selector knob inward to stop agitation.
Turn the cycle selector knob clockwise to the “Spin” position – typically the last setting on the right side of the dial.
Pull the knob outward with the lid closed – the spin cycle should engage within 5-10 seconds.
Listen for the motor ramping up speed over 20-30 seconds until reaching full spin velocity – approximately 640 RPM for this model.
Push the knob inward after 30 seconds of spinning to stop the cycle.
Open the lid and verify the water level has dropped by at least 4 inches, indicating proper pump-out function.

💡 Pro Tips

Take photos as you disassemble components – they’ll be invaluable when putting everything back together. If you encounter resistance or something doesn’t seem right, stop and reassess rather than forcing it.

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