ROOMBA·FAULT CHG 3 CRITICAL
Roomba Charging Error 3 — Charging system fault
Severity: Critical — internal charger fault — often ends in service or replacement 600eijs
DIRECT ANSWER
Charging error 3 means the robot's internal charging system isn't working properly. Try a reboot and a battery reseat, but be realistic — iRobot flags this one as a charger fault that often means service or replacement.
#meaning · #causes · #fix — link straight to any section
COMMON CAUSES · RANKED
1
Charging circuit failure MOST COMMON
The charging electronics on the robot's mainboard have developed a fault.
2
Transient charging glitch UNCOMMON
Occasionally a reboot and battery reseat clear the error for good — worth trying before anything drastic.
HOW TO FIX IT
SAFETY · READ THIS FIRST
Power off and remove the battery before working in the battery bay, and never charge a robot that smells hot or burnt.
Reboot the robot
Hold CLEAN until the robot restarts, then try charging again.
Reseat the battery
Power off, remove the battery for ten seconds, reinstall it, and dock the robot.
Clean both contact sets
Wipe the charging contacts on robot and dock with lightly dampened melamine foam, and let them dry.
Contact iRobot Customer Care
If charging error 3 remains, the charger hardware has failed — this is a warranty or service case, not a DIY part swap.
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Corrections
Spotted an error? Report a correction — fixes ship within 48h and are logged on this page.