Roborock Qrevo MaxV: Continuous Clicking Sound and Repair Diagnosis

⚠️ SAFETY WARNING / FIRE HAZARD. This device contains lithium batteries. Improper puncturing or bending during disassembly can cause explosions or flare-ups. The procedure requires precision and the assistance of a specialized technician is recommended. ReeFix provides this diagnosis EXCLUSIVELY for educational and informational purposes.

TECHNICAL CHECKLIST

• [ ] External plate inspection: Check for hair, threads, or dried detergent buildup blocking the sliding of the mop pin.
• [ ] Manual slide test: With the robot turned off, check if the lift slider moves smoothly or meets hard mechanical resistance.
• [ ] Internal gearbox inspection: Remove the casing and inspect the integrity of the plastic (POM) gear teeth in the Auto-Lift actuator.
• [ ] DC motor current draw test: Measure the no-load current draw of the micro-motor using a bench power supply (a spike triggers the OCP overcurrent protection on the board).
• [ ] Microswitch/limit switch check: Test the electrical continuity of the position sensor using a multimeter.

Components and testing tools:

• Roborock Qrevo MaxV Mop Lifting Motor Module
• Roborock Qrevo Lift Module Gear Kit
• Silicone Grease for Plastic Gears
• Precision Torx and PH Screwdriver Set
• Professional Digital Multimeter

INSPECTION RESULT

• POM gearbox gear stripping (65% probability)

  • Signal: Rhythmic continuous clicking during the mop lifting attempt.
  • Cause: Failure of gearbox teeth due to mechanical fatigue. Often happens when soapy water from the station leaks past the shaft seal, emulsifying the grease and increasing sliding friction.

• Sliders mechanical blockage / encrusted dirt (20% probability)

  • Signal: Clicking audible only at the end of travel or immediate lockup with error notification in the app.
  • Cause: Hair wrapped around the worm screw or hard detergent/limescale buildup.

• Microswitch / position sensor failure (10% probability)

  • Signal: Motor keeps running past the maximum limit point, forcing against the stoppers.
  • Cause: Failure to read the stop signal; the microcontroller does not cut power in time.

• Motherboard / power supply anomaly (5% probability)

  • Signal: Lockup without any moving mechanical noise or immediate error at startup.

Lab handoff:

Roborock Qrevo MaxV with Auto-Lift Mop blockage and rhythmic clicking (gear stripping). Triggering of OCP protection due to stall/slippage observed. Inspection of the gear box, checking of POM gear teeth, cleaning of sliding rails, and microswitch continuity test required prior to replacing the integrated module.

If the actuator gears show broken or stripped teeth -> replace the gear kit or the entire motor module; otherwise, clean the slides and reapply silicone grease.

If you are experiencing navigation or positioning issues with a model from the same brand, check out our solution report for the Roborock S7 MaxV Not Returning to Dock: Diagnosis & Fix.