Ryobi Ryobi RY40290 40V HP Brushless Whisper Series Jet Fan Blower CHARGER RED-GREEN Error Fix: Charger Alternating Red/Green — Defective Battery

Error code CHARGER RED-GREEN on the Ryobi Ryobi RY40290 40V HP Brushless Whisper Series Jet Fan Blower means: Charger Alternating Red/Green — Defective Battery. The Ryobi 40V charger LED is alternating between red and green. This indicates the charger has attempted to charge the battery but detected an internal fault — typically a failed or severely imbalanced cell group within the battery pack. The battery can no longer hold a proper charge and must be replaced. This is a definitive diagnosis — the charger has run its diagnostic routine and determined the battery is beyond recovery. Do NOT continue using this battery in tools even if it has some residual charge, as a cell-level fault can potentially cause overheating. Dispose of the battery at a battery recycling center (Home Depot, Lowe's, and most hardware stores accept lithium-ion batteries for recycling). Ryobi 40V batteries are covered by a 3-year limited warranty — check your purchase date. All Ryobi 40V batteries are interchangeable across the 40V platform, so any replacement 40V battery will work.

The most successful fix is "Replace Defective Battery Pack" (medium difficulty, ~30 minutes). Estimated DIY cost: $100-$130. HomeMD has 2 community-ranked fixes for this error.

This error is rated critical severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Replace Defective Battery Pack") is rated medium difficulty and takes about 30 minutes. Tools needed: .

DIY cost: $100-$130. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

The Ryobi Ryobi RY40290 40V HP Brushless Whisper Series Jet Fan Blower has 8 other known error codes, including: BATT ALL BLINK (Battery Fault — All 4 LEDs Blinking), BATT COLD (Battery Too Cold to Operate or Charge), BATT DEPLETED (Battery Fully Depleted — No LEDs Lit), BATT OVERHEAT (Battery Over-Temperature — Tool Shuts Down), IMPELLER DAMAGE (Impeller Fan Damaged by Foreign Object), and 3 more.

Error code CHARGER RED-GREEN also appears on 4 other Ryobi models: Ryobi RY401018 40V 20 in. Brushless Push Mower, Ryobi RY401110 40V HP Brushless 21 in. CrossCut Push Mower, Ryobi RY40260 40V Expand-It Cordless String Trimmer, Ryobi RY40550 40V HP Brushless 14 in. Chainsaw. The fix may vary by model, so check each model's specific page for tailored repair steps.