Common Signs Your Radon Mitigation System Isn’t Working Properly

October 17, 2025      

Your radon mitigation system is your home’s first line of defense against dangerous radon gas—but like any mechanical system, it needs regular maintenance to stay effective. Over time, components can wear out, fans can fail, or airflow can drop, allowing radon levels to rise again. Knowing the warning signs of a failing system can help you act quickly and keep your home safe.

Here are some common signs your radon mitigation system may not be working properly:

1. The system fan isn’t running.

If your system uses an active fan, check whether it’s operating. A quiet or completely silent fan could mean it’s turned off, has lost power, or has burned out.

2. The pressure gauge shows no airflow.

Most systems have a small U-tube or manometer that measures pressure. If the fluid levels are even or haven’t changed since installation, it may indicate a problem with suction or airflow.

3. Unusually high radon test results.

If a follow-up radon test shows elevated levels again, your mitigation system might not be reducing radon as it should. This is the clearest sign that something needs attention.

4. Visible cracks, damage, or disconnected pipes.

Check your piping and sealing points. Cracks, loose joints, or disconnected vent lines can allow radon to seep back into your home.

5. Increased moisture or musty smells in the basement.

Excess humidity or odors can indicate that your ventilation system isn’t circulating air properly—a potential side effect of system failure.

If you notice any of these signs, don’t wait. The Radon Guys can inspect, repair, or replace your system to ensure it’s working at peak performance. Regular system maintenance and periodic testing are the best ways to ensure your family stays protected from harmful radon exposure.

Schedule a radon system checkup today and keep your home’s air safe and healthy all year long.

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