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Battery sprayer will not turn on even with a full charge

A full battery but no pump usually means an overheated protection circuit, chemical residue locking the pump, or a failed pump head. Cool it down, reseat the battery, flush the pump, then replace if needed.

Updated June 3, 2026

Applies to:

All FGI battery-powered sprayers (DEWALT DXSP190681 and DXSP190612, CRAFTSMAN CMXCAFG190640 and CMXCAFG190682, Smith 190567, Scotts, LESCO, and other lithium-ion models).

What causes this:

The battery shows a full charge and its light comes on, but the pump motor will not start when you press the trigger. This is usually a protection circuit that has tripped, chemical residue blocking the pump, or, less often, a failed pump head.

  • An overheated pump protection circuit that has tripped
  • Chemical residue locking the motor
  • A damaged battery misreading as full
  • A failed pump head

How to fix it:

  1. Remove and reinsert the battery to be sure it is fully seated and clicked in.
  2. Check the indicator lights: solid green means charged; a blinking or continuously blinking light means a thermal or fault condition is stopping the pump.
  3. Let the sprayer cool 30 to 45 minutes if it has run heavily; battery pumps shut down to protect from overheating.
  4. Try a different fully charged battery if you have one, to rule out a battery misreading as full.
  5. Inspect for chemical residue; dried chemical can lock the motor. Run clean water through the pump and follow your manual's cleaning steps.
  6. Try priming the pump (see how to manually prime your battery-powered sprayer pump).
  7. If it still will not start, the pump head has likely failed. Call 1-800-311-9903 to start a warranty claim or order a replacement pump head.

Still stuck? Call us at 1-800-311-9903 or send a message. Monday to Friday, 8AM to 5PM EST.