ISSUE GUIDE

Basement sump pump not working with water present

Sump Pump Not Working

Sump Pump Not Working can lead to rapid basement flooding during heavy rain. Act immediately to protect valuables and prevent mold—most fixes involve power, float switches, or discharge issues.

GET EXPERT ANALYSYSEXPLORE SERVICES

Standing water and electricity are a dangerous combination. Avoid touching electrical cords or outlets near water. If water is rising fast, shut off power to the area at the breaker and call a pro.

RECOMMENDED PRO

PLUMBER

WHAT THIS USUALLY MEANS

  • No power at the outlet, tripped GFCI, or failed extension/cord
  • Float switch stuck or tangled, preventing the pump from turning on
  • Clogged intake or debris in the pit jamming the impeller
  • Frozen/blocked discharge line or failed check valve
  • Pump failure due to age, overheating, or worn motor

DIY-SAFE CHECKS

DIY-safe checks: Do not enter standing water. Use a flashlight and keep hands dry.

  • Confirm the pump is plugged directly into a working GFCI outlet
  • Press Reset on the GFCI and check for a tripped breaker
  • Inspect the float to ensure it moves freely and isn’t wedged against the pit wall
  • Look for a kinked discharge hose/pipe or visible blockage at the exit point

HOW TO FIX

  1. Unplug the pump (dry hands). Reset the GFCI and breaker, then plug back in.
  2. Gently lift the float to test activation. If it doesn’t click/run, the switch may be bad.
  3. Clear obvious debris from the pit surface with a tool (do not reach into water).
  4. Check the discharge line outside for ice or obstruction; ensure water can exit away from the foundation.
  5. If the pump runs but water returns, the check valve may be stuck or installed incorrectly.

DIY checks can confirm power, float movement, and discharge blockage. If the pump won’t run or the pit is overflowing, stop and call a licensed plumber.

WHEN TO CALL A PRO

Call a pro immediately if the pit is overflowing, the pump hums but won’t move water, the outlet repeatedly trips, or the discharge line is frozen/blocked and you can’t clear it safely. A plumber can replace the pump/float, add a proper check valve, and recommend a battery backup.

GET EXPERT ANALYSISBROWSE ALL GUIDES