What should I do if my sump pump stops working after heavy rain?

If your sump pump stops working after heavy rain, check power and basic safety first, then rule out simple causes before calling for service. The most common culprit is a power interruption or a float switch that can’t rise. Storm runoff can also overwhelm the pit or restrict the discharge, making a good pump look bad. If water is rising, treat it as urgent to limit damage. Our team regularly resolves storm-related pump failures across Chicago’s North Shore. A technician can measure draw and flow to decide if a repair, a new switch, or full replacement is the smarter fix. 24/7 emergency help is available for active flooding.

Quick checks you can try now:

• Verify the GFCI and circuit breaker are on; reseat the pump’s plug if it uses a piggyback float.
• Lift the float by hand to see if the pump starts; if it runs but doesn’t move water, the impeller may be jammed.
• Clear the discharge line, check the exterior termination for ice or blockages, and ensure the check valve isn’t stuck.
• Remove visible debris from the basin grate/intake and retest with a bucket of water.

Turn off power at the breaker before touching the pump or water, and call a licensed plumber if flooding continues.

Updated: 2026-07-04

Need help in Evanston, IL? Call (847) 440-5642 or book online.