SYSTEM REPAIR
Existing Systems and Fan Replacement
If your radon mitigation system is not working as it should, here is how to diagnose common issues and find the right repair.
CHECK YOUR SYSTEM
How to tell if your system is working
The manometer on your mitigation pipe is the simplest way to check.
Check the manometer
The U-tube pressure gauge on the pipe shows whether the fan is pulling a vacuum. When the liquid levels are unequal, the fan is running. When they are level, the fan is not running.
Conduct a radon test
The manometer only tells you the fan is running—not whether radon is low. A short-term test confirms the system is reducing radon effectively.
COMMON ISSUES
When to call for repair
Here are the most common problems with existing radon mitigation systems.
Fan not running
The fan may have reached the end of its life, tripped a breaker, or lost power. Check the manometer—if the liquid levels are equal, the fan is not pulling a vacuum.
Radon level rising
If a follow-up test shows radon levels increasing, the system may need a new fan, additional suction points, or sealing work.
Noise or vibration
A fan that has become noisy or is vibrating may be failing or loosely mounted. We can inspect and replace it.
Cracks or gaps
If cracks have developed in the floor slab or around the sump pit since installation, sealing them can improve system performance.
FAN REPLACEMENT
How long does a radon fan last?
Radon fans typically last 5 to 10 years, though some last longer.
When a fan fails, the manometer will show equal liquid levels, indicating the system is no longer pulling a vacuum. You may also notice the system is quieter than usual or has stopped humming.
Fan replacement is the most common repair for existing systems. We can identify the correct replacement fan for your system, swap it out, and confirm the system is working properly with a follow-up check.
If your fan is still running but your radon test shows elevated levels, the issue may not be the fan itself. The system may need additional suction points, sealing work, or a more powerful fan. We can diagnose the root cause.
What a repair visit may include
- Inspecting the manometer and fan operation
- Checking pipe connections and routing for leaks
- Sealing cracks or gaps that have developed
- Replacing the fan with a compatible model
- Conducting a follow-up radon test
NEED A REPAIR?
Request a system repair quote
If your existing system needs attention, we can diagnose the issue and recommend a repair.