The short answer
Power Outages
A storm often knocks out electricity, and your sump pump stops working the moment the power goes. If your pump is plugged into a standard outlet, a power loss leaves your basement unprotected. A battery backup or a generator can keep the pump running, but you need to plan ahead.
If the power stays on, the pump might still fail if the circuit breaker trips. The pump draws a lot of current, especially when the sump fills quickly. Check your breaker panel after a storm and reset the switch if it flipped. If the breaker trips often, the circuit may need an upgrade.
Float Switch Problems
The float switch tells the pump when to turn on and off. If the float gets stuck, the pump may not start even when water rises. Debris, a tangled cord, or a misaligned float can cause this. Over time, the switch can wear out and fail to move freely.
You can test the float by lifting it manually to see if the pump activates. If the float is dirty, clean it gently. If it still sticks, you may need to replace the switch. A professional can inspect and adjust the float so it works correctly during heavy rain.
- Float stuck in the off position
- Float tangled with the pump cord
- Float misaligned after installation
- Debris blocking the float movement
- Worn-out switch that no longer responds
Clogged Intake or Discharge
Storm water brings dirt, leaves, and small rocks into the sump pit. These can clog the pump's intake screen, reducing water flow. If the intake is blocked, the pump runs but moves little water, and the pit fills faster than the pump can empty it.
The discharge pipe can also clog, especially if it has a check valve. A stuck check valve prevents water from leaving, causing the pump to run without moving water. Inspect the pit and pipes before a storm, and remove any debris you find.
Pump Overload or Overheating
During a storm, the pump may run continuously as water flows into the sump. If the pump is too small for the volume, it can overheat and shut off. Many pumps have a thermal overload switch that trips to protect the motor, but it leaves you without pumping until it cools down.
Continuous operation also wears the motor faster. If your pump shuts off after running for a long time, it may be undersized for your situation. Consider a larger pump or a second pump to handle the load. A professional can evaluate your pumping needs.
Check Valve Failure
The check valve sits on the discharge pipe and prevents water from flowing back into the sump after the pump stops. If the valve fails, water returns to the pit, causing the pump to cycle on and off repeatedly. This shortens the pump's life and can lead to failure.
A stuck check valve can also block water from leaving the pipe, putting extra strain on the pump. Inspect the valve for debris or wear, and replace it if it doesn't seal properly. A plumber or a water damage pro can help with this repair.
- Valve stuck in the closed position
- Debris caught in the valve flap
- Valve installed backward
- Worn-out spring or hinge
- Corrosion on the valve body
Water damage does not wait
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (313) 766-2970Frequently asked questions
What should I do right after a sump pump failure?
First, check if the power is on and if the circuit breaker tripped. If the pump is clogged, remove debris from the pit. If water is rising, use a wet-dry vacuum or a bucket to remove water. Then call a local water damage pro to inspect the pump and the system.
Can I prevent sump pump failure during a storm?
You can reduce the risk by testing the pump regularly, cleaning the pit, and checking the float and check valve. A battery backup or a generator helps during power outages. If your pump is old or undersized, consider replacing it before the next storm.
Should I replace my sump pump after a failure?
If the pump is old or the motor is burned out, replacement is often better than repair. A pro can test the pump and determine if it is worth fixing. If the pump fails again, you may need a larger model to handle heavy rainfall.
More questions and answers
- How Do You Tell If Your Sump Pump Needs Replacing Before It Fails?
- What Is the Process of Cleaning up After a Sump Pump Failure?
- How Do You Handle Mold Near a Sump Pump Area?
- How Do You Tell If Your Sump Pump Is Adequate for Your Home?
- What Are Signs of a Failing Sump Pump?
- What Are the Most Common Storm Damage Claims?
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