Plumbing Emergency Avg. cost: $500
Sump Pump Failure: Causes, Fixes & When to Call a Plumber
A sump pump that isn't running during rain may have a tripped GFCI outlet, clogged intake screen, stuck float switch, or dead motor. Reset the GFCI outlet first. If the pump is running but not draining, the discharge line may be blocked. If flooding has started, call a plumber immediately.
Find an Emergency Plumber NowWhat Causes Sump Pump Failure?
- Tripped GFCI outlet cutting power
- Float switch stuck in the down position
- Clogged pump intake screen
- Pump motor failure
- Frozen or blocked discharge line
- Pump too small for the volume of water
How to Fix Sump Pump Failure: Step-by-Step
- 1Check and reset the GFCI outlet the pump is plugged into
- 2Manually lift the float to test if the pump activates
- 3Clear debris from the intake screen at the bottom of the pump
- 4Inspect discharge pipe for ice blockage in winter
- 5Test with a bucket of water: pour water into the pit and verify the pump activates
When Should You Call a Plumber?
Call immediately if water is rising and the pump won't start, if the discharge pipe is frozen or blocked, or if the motor has failed. Before rainy season, have your sump pump tested annually.
How Much Does Sump Pump Failure Repair Cost?
Average Cost $500
Typical Range $200 – $2,000
Costs vary by location, severity, and whether emergency service is needed. Prices shown are national averages. Get a free quote from a local plumber →
Frequently Asked Questions About Sump Pump Failure
- Pour 5 gallons of water slowly into the sump pit. The pump should activate, drain the water, then shut off. If it doesn't start or doesn't shut off, service it immediately — before the next storm.
- Yes — power outages often accompany the same storms that cause basement flooding. A battery backup pump runs 5–7 hours on a charge and activates automatically if your primary pump fails or loses power.
- Quality sump pumps last 7–10 years. Replace proactively at 7 years if you've had flooding issues before, or sooner if you notice it running more frequently, making unusual noise, or cycling rapidly.