iRobot · Robot Vacuum Serious

Error 15 — Internal communication error

Robot detected an internal electrical or firmware fault. Often resolved by reboot but can indicate failing electronics.

Keep using it?
Limited use only
DIY difficulty
Moderate
Verified against
homesupport.irobot.com ↗

How to fix it

  1. Perform a reboot: press and hold CLEAN for 20 seconds (i/j/s series) or 10 seconds (600/900 series) until the robot powers down.
  2. Wait 10 seconds, then press CLEAN to power back on.
  3. If error returns, perform a factory reset via the iRobot HOME app (Product Settings → Remove/Factory Reset).
  4. Check the iRobot HOME app for firmware updates and apply.
  5. If error persists after reset and firmware update, the robot likely needs replacement or warranty service.

Why it happens

Typical signs: 'Error 15' voice prompt · Robot may not respond normally to buttons · Random shutdowns

  • Firmware glitch Temporary software issue resolved with a reboot.
  • Loose internal connector Vibration loosened a ribbon cable or wiring harness.
  • Failing logic board Component on the main PCB is failing.

More iRobot robot vacuum codes

Charging Error 2 Charging Error 2 — Battery not detected Charging Error 3 Charging Error 3 — Battery won't charge Charging Error 5 Charging Error 5 — Low current fault (dirty contacts) Error 1 Error 1 — Side wheel stuck / off ground Error 10 Error 10 — Right wheel sensing problem Error 11 Error 11 — Vacuum motor not activating

All iRobot codes → All robot vacuum codes →

Frequently asked questions

What does the Error 15 code mean on a iRobot robot vacuum?

Robot detected an internal electrical or firmware fault. Often resolved by reboot but can indicate failing electronics.

What causes the Error 15 code on a iRobot robot vacuum?

Firmware glitch: Temporary software issue resolved with a reboot. Loose internal connector: Vibration loosened a ribbon cable or wiring harness. Failing logic board: Component on the main PCB is failing.

Is it safe to keep using a iRobot robot vacuum with a Error 15 error?

Limited use only. This is rated a serious-severity fault.

How do I fix Error 15 on a iRobot robot vacuum?

Perform a reboot: press and hold CLEAN for 20 seconds (i/j/s series) or 10 seconds (600/900 series) until the robot powers down. Wait 10 seconds, then press CLEAN to power back on. If error returns, perform a factory reset via the iRobot HOME app (Product Settings → Remove/Factory Reset).

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: homesupport.irobot.com.