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Charger Flashing Red

DeWalt Power Tool Charger

Severity: Moderate

Source: OnlyErrorCodes.com — Every error code. One place.

DeWalt Charger Flashing Red — Fix Guide

What Does This Error Mean?

DeWalt charger flashing red means the battery is too hot, too cold, defective, or deeply discharged. Remove the battery, wait 30 minutes, and reinsert to retry.

How to Fix It

  1. Check the LED pattern

  2. Wait for battery to reach room temperature

  3. Clean the battery contacts

  4. Try a different battery on the same charger

  5. Try the battery on a different charger

  6. Check for over-discharge

Frequently Asked Questions

What does a solid red light mean on a DeWalt charger?

A solid red LED on a DeWalt charger typically means the battery is actively charging. A flashing red light indicates a problem — usually temperature out of range or a defective pack.

What does it mean when a DeWalt charger flashes red and green alternately?

Alternating red and green flash on some DeWalt chargers indicates a defective battery that the charger cannot charge. The battery pack needs to be replaced.

Can a DeWalt charger damage a good battery?

DeWalt chargers have built-in protection and communicate with the battery via the contacts. A faulty charger can in rare cases prevent charging but should not damage a good battery.