Roborock robot vacuum: error Error 15Error 20
Code Error 15 / Error 20 on a Roborock robot vacuum display means: dirty wall sensor or optical sensor.
- Meaning
- Dirty wall sensor or optical sensor
- Check first
- Wipe the sensors on the underside and at the front with a soft, dry cloth.
- Repair shop
- 270–680 zł
Most common causes
- Dust on the sensor
What you can check yourself
Wipe the sensors on the underside and at the front with a soft, dry cloth.
Move the robot away from dark carpets and stair edges.
Start it again.
- the error keeps coming back after these checks,
- water is leaking or you smell burning,
- the appliance trips the circuit breaker.
More detail in our guide: Robot vacuum →
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What does error Error 15 mean on a Roborock robot vacuum?
Code Error 15 / Error 20 means: dirty wall sensor or optical sensor. The most common causes: dust on the sensor.
Can I keep using the robot vacuum with error Error 15?
If the error goes away after the checks above, yes. If it keeps coming back, water leaks, you smell burning or the breaker trips, stop using it and call a repair service.
Other codes: Roborock robot vacuum
- Error 1lidar sensor is blocked
- Error 2bumper is stuck
- Error 3wheels are lifted off the floor
- Error 4cliff sensor fault (anti-fall)
- Error 5main brush is jammed
- Error 6 / Error 17side brush is jammed or damaged
- Error 7drive wheels are jammed
- Error 8the robot is stuck and cannot move
- Error 9 / Error 10dust bin missing or filter clogged
- Error 12 / Error 14battery level too low or battery fault
- Error 13 / Error 19problem with charging or with the dock's power supply
- Error 18suction fan fault
A code can mean different things on different models and years. Always check the manual or the manufacturer's support page too. Repair prices are approximate, for repair shops in Poland.