How to Use Diagnostic Modes on a Roper Washing Machine
Ben Schlichter and 2 other contributors
Last updated on Jun 11, 2026
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Introduction
Go to step 1 ↓Use the hidden diagnostic features on your Roper vertical modular washer to find out why it won't spin or drain. This guide shows how to open the cabinet safely, read the technician sheet, enter and navigate each service mode, clear fault codes, run automatic and manual tests, and complete the required recalibration.
What you need
Tools
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TR10 Torx Security ScrewdriverOptional
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Step 1 Open the top and locate the technician sheet
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Use a 1/4" nut driver to remove the harness-plate screw and the two rear top-panel screws.
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Pull the lid toward you, lift upward, then push it back so it pivots on the rear metal tabs.
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Reach inside the front left corner and remove the folded technician’s sheet.
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Step 2 Set the control knob to the home position
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Rotate the main cycle knob counter-clockwise until it rests at the 12 o’clock position after one full turn.
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Step 3 Enter diagnostic mode
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Turn the knob right three clicks, left one click, then right one click, pausing about half a second between moves.
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Step 4 Browse the diagnostic menu
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Turn the knob clockwise to scroll through the available service options.
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Step 5 View and clear stored error codes
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Stop at the Cycle Complete lamp, then press Start to enter error code mode.
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After the lamps flash, rotate the knob clockwise to display up to four stored fault codes.
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Move to the fifth position and hold Start for about five seconds to erase all codes.
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Step 6 Run the automatic test sequence
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Rotate to Automatic Test and press Start to run a three-minute check of every major component.
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Remove the two Torx screws, slide the striker off the lid, and insert it into the lock to simulate a closed lid.
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Step 7 Use manual test functions
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Press Start to enter Manual Test then turn the knob to the function you want to evaluate.
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Press Start again to begin the action and press it once more to stop it.
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Hold Start for three to four seconds to exit Manual Test and return the washer to standby.
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Step 8 Perform system recalibration reset
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From diagnostics rotate the knob four clicks clockwise until only the Rinse lamp is lit and press Start.
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All panel lamps turn off when calibration is complete and the washer is ready for normal use.
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Step 9 Reassemble the washer cabinet
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Lower the top onto the rear hinges slide it forward and reinstall the three back screws.
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Clear old fault codes and complete recalibration before returning the washer to service so the control recognizes any repair work. Repair didn't go as planned? Ask our Answers community for help.
