When your sewage pump does not start, you probably have a problem with the power supply, the float or a blockage in the system. First check the fuse and that the pump is powered, then the freedom of movement of the float. If the pump still doesn't work, it may be due to mechanical failure or blockage that requires professional help. Here are answers to the most common questions about sewage pump problems.
Why does the sewage pump not start when it should?
The sewage pump does not start due to electrical problems, defective float, blockage or mechanical failure of the pump. The most common causes are interrupted power supply, stuck float that cannot activate the pump, or the pump is stuck due to foreign objects.
Electrical problems are the most frequent cause of sewage pumps not starting. This can be anything from a blown fuse to faulty wiring or corrosion in electrical connections. Moisture and condensation in basements can cause short circuits that cause the pump to stop working.
Float problems occur when the float gets stuck in the wrong position or when the mechanism that activates the pump has broken. The float acts as a level switch that starts the pump when the water level rises. If it is stuck in the lower position, the pump will never start, even if the well fills with water.
Blockages in the drainage system can prevent the pump from starting or cause it to overload. Foreign objects, grease, hair or other debris can clog the pump inlet or rotor, preventing the motor from rotating normally.
How do I troubleshoot a sewage pump that does not start?
Start by checking the power supply by checking fuses and that the pump is plugged in. Then check the freedom of movement of the float and that it can move freely up and down. Always turn off the power before making any checks on the pump or float.
Follow these steps for safe troubleshooting:
- Check the fuses in the switchboard and see if any have tripped
- Verify that the pump is plugged in and that the cord is not damaged
- Manually raise and lower the float to test if the pump starts
- Check if there are visible blockages around the pump inlet
- Listen for unusual sounds when you try to start the pump
If the pump is energized but does not start, the problem may be mechanical. A faint buzzing sound often indicates that the motor is trying to start but cannot rotate due to blockage or defective rotor. Complete silence suggests electrical problems or completely defective motor.
Avoid trying to repair electrical components yourself. Water and electricity are a dangerous combination that requires professional handling. Limit your troubleshooting to visual checks and simple tests of float operation.
How much does it cost to repair a sewage pump that is not working?
Repairing a sewage pump usually costs between €2,000 and €5,000 depending on the extent of the problem. Simple repairs such as replacing the float or clearing blockages cost less, while motor replacements or complicated electrical faults are more expensive.
Cost factors that affect the price include:
- Type of fault and which components need replacing
- Age of the pump and availability of spare parts
- Working time and complexity of the repair
- If special tools or additional equipment are needed
- Emergency services outside normal working hours
Replacing the entire sewage pump costs between SEK 5000-12000 including installation. This is often more economical than extensive repairs to older pumps. Pumps over 10-15 years old should usually be replaced completely as new faults are likely to occur soon.
Always compare the cost of repair against new purchase. If the repair costs more than half the price of a new pump, it is often smarter to replace the whole system. You will also benefit from a warranty and improved energy efficiency.
When should I contact a plumber for sewage pump problems?
Contact a plumber immediately if the pump does not start even though it is energized, if there is a burning smell from the pump, or if there is water leakage around electrical components. Electrical problems and complicated mechanical failures always require professional handling for your safety.
Warning signs that require professional help:
- Pump buzzes but does not start
- Smell of burning or visible smoke from the pump
- Fuses blow repeatedly when the pump starts
- Water rises in the well although the pump seems to work
- Unusual sounds or vibrations from the pump
Qualified plumbing technicians have the right tools and knowledge to safely diagnose sewage pump problems. They can handle both electrical and mechanical repairs without compromising safety. Professional service also gives you a guarantee on work done.
Don't wait to call if the drainage system is not working. Flooded basements can cause extensive water damage and health problems. Emergency service is available 24/7 for critical sewer problems that cannot wait until regular business hours.
How 24 Center helps with sewage pump problems
We offer 24/7 emergency sewage pump service when your pump won't start or malfunctions. Our qualified plumbing technicians have expertise in all types of sewage pumps and can quickly identify and resolve both electrical and mechanical issues.
Our services for sewage pump problems include:
- Emergency troubleshooting and repair of sewage pumps that do not start
- Professional inspection of electrical connections and safety systems
- Clearing blockages and servicing float systems
- Complete replacement of defective pumps with modern energy-efficient models
- Preventive maintenance to prevent future downtime
With our local network of technicians across Sweden, we can offer a fast response time when you experience a sewage pump problem. We understand that a faulty sewage pump can't wait, which is why we prioritize emergency cases and work to resolve the problem the same day.
Contact us at 24 Center on 08 40 24 240 for immediate help with your sewage pump that won't start, or book a visit online for scheduled maintenance and service.
Frequently asked questions
Can I restart the sewage pump myself if it has stopped?
Yes, you can try restarting the pump by turning off the power for 10-15 minutes and then turning it on again. First check that the float moves freely and that there are no visible blockages. If the pump does not start after restarting or if the same problem repeats, contact a professional technician.
How often should I test my sewage pump to prevent problems?
Test the sewage pump monthly by pouring water into the well until the float activates the pump. Also check that the float moves freely and that there is no debris around the pump inlet. Annual professional servicing is recommended to detect potential problems before they cause downtime.
What should I do if the sewage pump starts but does not pump the water away?
If the pump starts but does not pump water, the problem may be a blocked rotor, defective check valve or leakage in the pressure system. Turn off the pump immediately and check if the discharge hose is bent or blocked. This problem usually requires professional diagnosis as it may be due to internal mechanical faults.
How long does a sewage pump last before it needs replacing?
A quality sewage pump will normally last 10-15 years with proper maintenance. Pumps in areas with hard water or high sediment may need to be replaced sooner. If your pump is over 10 years old and requires repeated repairs, it is often more economical to invest in a new, energy-efficient model.
What are the warning signs that the sewage pump might stop working soon?
Common warning signs include unusual noises such as scraping or buzzing, the pump starting and stopping repeatedly, longer than normal run times, or visible corrosion on pump components. If you notice any of these signals, book a professional inspection to avoid sudden downtime.
Can I use a regular water pump to replace the sewage pump temporarily?
No, never use a regular water pump for sewage. Sewage pumps are specially designed to handle contaminated water and solid particles that can damage ordinary pumps. A temporary solution may be to pump out the water manually or use a portable submersible pump designed for dirty water.
What is the cost of having a backup sewage pump installed as a backup?
The installation of a double pump system usually costs an extra 8000-15000 SEK on top of the basic installation. This includes a second pump, alternating control system and modified well construction. The backup pump is automatically activated if the main pump fails, providing peace of mind for properties at high risk of basement flooding.
