The short answer
Common Causes of Failure
A sump pump usually stops because the float switch gets stuck. Debris or a misaligned rod keeps the switch from rising, so the pump never turns on. Another frequent culprit is a clogged inlet screen or discharge line, which blocks water flow and makes the motor overheat.
Electrical problems also rank high. A tripped breaker, a blown fuse, or a worn-out power cord can cut power entirely. If your pump runs on a battery backup, a dead or corroded battery leaves you unprotected during storms. Check the power source first, then inspect the switch and lines.
Improper pump sizing is another issue. A pump that is too small for your basin may run constantly and burn out, while an oversized pump cycles too fast and wears the switch. If the pump is old, internal seals and bearings can fail, causing leaks or a seized motor.
- Stuck or misaligned float switch
- Clogged intake screen or discharge pipe
- Tripped breaker or blown fuse
- Dead battery backup or corroded terminals
- Faulty check valve causing short cycling
- Old or undersized pump motor
What You Can Check Yourself
Start by unplugging the pump and checking the power cord for damage. Look at the circuit breaker and reset it if needed. Make sure the float moves freely and is not tangled. Clean any debris from the pit and the pump's intake screen.
Pour a bucket of water into the pit to see if the pump turns on. If it does, the issue might be intermittent. If it does not, test the float by lifting it manually. If the pump still fails, the motor or switch may be broken.
Also check the discharge line outside your home. Dirt can block it, preventing water from leaving. Clear any obstruction and ensure the line slopes away from the foundation. If you have a battery backup, test it by unplugging the main pump and seeing if the backup kicks in.
When to Call the Pros
If your sump pump fails and water is rising in the pit or flooding your lower level, call the pros right away. Standing water can soak into drywall, flooring, and personal belongings, leading to mold and structural damage. The pros have the tools to remove water and dry your home.
Do not wait to see if the pump starts on its own. A failed pump often means a larger problem, like a broken motor or a blocked discharge line. The pros can inspect the entire system, find the root cause, and recommend a repair or replacement.
If you have already had water damage, the pros can also assess the extent. They use moisture meters and infrared cameras to find hidden water. This helps prevent mold growth and protects your home's structure.
Preventing Future Failures
Test your sump pump every few months by pouring water into the pit. Make sure the float rises and the pump turns on and drains. This simple check catches most issues before they become emergencies.
Clean the pit and pump intake regularly. Remove any debris, gravel, or roots that might block the float or screen. Also check the discharge line for kinks or clogs, and ensure the check valve works properly.
Consider installing a battery backup or a water-powered backup pump if you do not have one. Power outages are a common cause of sump pump failure, and a backup keeps your lower level dry during storms. Test the backup monthly.
Replace your sump pump every 5 to 7 years, or sooner if it shows signs of wear, like strange noises or frequent cycling. An old pump is more likely to fail when you need it most. Keep the manual and note the model number for replacement parts.
Dealing with Water Damage After a Failure
If your sump pump fails and water gets into your lower level, act quickly. Remove standing water with a wet/dry vacuum or mop if it is shallow. Move furniture and belongings to a dry area to prevent further damage.
The pros can handle large-scale water removal and drying. They use industrial pumps and dehumidifiers to extract water and reduce humidity. This helps prevent warping, swelling, and mold growth.
Water that sits for more than 24 hours can soak into drywall and flooring. In that case, you may need to remove and replace damaged materials. The pros can assess what is salvageable and what needs to be torn out.
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Call Now (480) 898-4279Frequently asked questions
How often should I test my sump pump?
Test your sump pump every three months. Pour a bucket of water into the pit and watch the float rise and the pump turn on. If it does not turn on, check the power and float. Regular testing catches problems early.
Can I fix a sump pump myself?
You can fix simple issues like a stuck float or a clogged intake. Clean the pit and test the switch. For electrical problems or motor failures, it is safer to call the pros. They have the tools and knowledge to handle the repair.
What should I do if my lower level floods?
Turn off the power to the area if it is safe, then remove water with a wet/dry vacuum. Move belongings to a dry spot. Call the pros for thorough drying and to address any structural damage. Policies vary, and your insurer decides what is covered. Document everything in case you file a claim.