Radon System Repair 101: Keep Your Home Safe and Gas-Free

Written by Sawyer Thoms  »  Updated on: April 03rd, 2025

Radon is an invisible, odorless, and tasteless gas that can seep into homes, posing serious health risks. Long-term exposure to radon is the second leading cause of lung cancer in the United States, making it crucial to ensure that your radon mitigation system is functioning properly. If your radon system is faulty or underperforming, timely repair and maintenance are essential to keep your home safe.

In this comprehensive guide, we will explore how radon mitigation systems work, signs of system failure, common repair issues, and expert solutions to maintain an efficient system that keeps radon levels low.

What Is a Radon Mitigation System?

A radon mitigation system is designed to reduce indoor radon levels by venting the gas outside. These systems typically include:

A vent pipe that extends from the basement or crawl space to the roof

A radon fan that creates negative pressure to pull radon from beneath the home

Sealing of foundation cracks to prevent radon entry

When installed correctly and maintained properly, these systems significantly lower radon levels and protect your household from harmful exposure.

Signs That Your Radon Mitigation System Needs Repair

It’s crucial to regularly inspect your radon system to ensure it’s functioning correctly. Here are some common signs that indicate repairs may be necessary:

1. Higher Radon Levels

If recent radon tests show elevated radon levels despite having a mitigation system in place, this is a clear indication that the system is not working effectively.

2. Noisy or Malfunctioning Fan

Radon fans should run quietly and continuously. If you hear unusual noises, or if the fan has stopped working altogether, it likely needs to be repaired or replaced.

3. Condensation or Water Damage

Moisture buildup in the vent pipe can cause corrosion, blockages, or electrical damage to the fan, leading to system failure.

4. Cracked or Disconnected Pipes

Physical damage to the pipes, such as cracks or disconnections, can reduce suction power, allowing radon to accumulate indoors.

5. Power Failures or Electrical Issues

If your radon fan is frequently turning off due to power surges or faulty wiring, it may require electrical repairs or a backup power source.

Common Radon System Repair Issues and Solutions

1. Replacing a Broken Radon Fan

If your radon fan stops working, the most effective solution is to replace it. Choose a fan that matches the power requirements of your existing system for optimal performance.

Steps to replace a radon fan:

Turn off the power to the fan.

Remove the old fan and disconnect wiring.

Install the new fan, ensuring airtight seals.

Restore power and test the system.

2. Fixing a Clogged or Blocked Vent Pipe

Debris, insects, or ice buildup can block the vent pipe, reducing airflow and allowing radon to accumulate inside your home.

How to fix it:

Inspect the vent pipe for obstructions.

Use a plumber’s snake or compressed air to clear blockages.

Install a protective screen to prevent debris entry.

3. Repairing Cracked Seals or Foundation Leaks

Cracks in the foundation can allow radon to seep into your home even if the system is operational.

How to seal cracks:

Use urethane caulk or epoxy to seal visible cracks.

Apply a concrete sealant to cover porous areas.

Regularly check for new cracks and repair as needed.

4. Addressing Electrical Issues

A failing power supply can disrupt the radon system’s functionality.

Solutions:

Check the power outlet and wiring connections.

Use a surge protector to prevent damage.

Consider installing a backup battery system in case of power outages.

Preventative Maintenance Tips for Radon Systems

To avoid costly repairs and ensure your system operates efficiently, follow these preventative maintenance tips:

Test your home for radon annually using a reliable radon test kit.

Listen for unusual noises from the radon fan.

Inspect vent pipes for cracks, leaks, or blockages.

Check system pressure levels to ensure proper operation.

Seal new foundation cracks as soon as they appear.

When to Call a Professional for Radon System Repair

While some minor repairs can be done by homeowners, professional assistance is recommended for major issues such as:

Complete fan replacement

Extensive foundation repairs

Persistent high radon levels despite repairs

Electrical issues requiring rewiring

Professional radon mitigation experts have specialized tools and expertise to diagnose and fix system failures effectively, ensuring your home remains safe.

Conclusion

A properly functioning radon mitigation system is essential for maintaining a safe and radon-free home. Regular maintenance and timely repairs can extend the life of your system and provide continued protection against harmful radon exposure. By staying proactive and addressing issues promptly, you can ensure that your radon levels remain within safe limits. For expert services, visit Cincinnati Radon Mitigation.

If you suspect your radon system is malfunctioning, don’t delay repairs—taking action today can protect your family’s health for years to come.


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