Short answer: Check your manometer gauge — uneven liquid levels mean your fan is running and the system is working. Even liquid means the fan has stopped. You should also retest your home's radon level every 2 years, even if the gauge looks fine.
You have a radon system. That is great! But how do you know it is still working? Here are two easy ways.
1. Check the gauge
Your system has a small gauge on the pipe. It is called a manometer. It looks like a U-shaped tube with colored liquid inside.
What to look for:
- The liquid is uneven (one side higher than the other): Good! Your fan is pulling.
- The liquid is even (both sides the same): Uh oh. Your fan may not be working.
Tip: Check your gauge once a month. It only takes a few seconds.
2. Test again every 2 years
Even if the gauge looks good, you should test your home for radon every 2 years.
Why? Things can change. Your home can settle. New cracks can form. The fan can slow down over time.
You should also test again if:
- You finish your basement
- You do a big remodel
- You add onto your home
- Someone starts using a lower-level room more
Listen to your fan
Your fan should make a soft, steady hum. If it gets very loud, rattles, or stops, give us a call.
Radon fans do not last forever
Radon fans run all day, every day. After many years, they wear out — most last 5-10 years before they need to be replaced. If yours is not working, we can replace it.