Warning Signs a Radon System Is Not Working
The clearest warning signs are a manometer reading back at level (no vacuum), a fan that has stopped making its usual quiet running sound, visible ice or condensation blocking the exterior vent pipe in winter, or a physical change to the foundation, like a new crack or an addition, that could have altered how the system draws air.
Most radon fans are designed to run for many years continuously, but like any mechanical device with a motor, they do eventually fail, and a homeowner who never checks the manometer may not notice until a routine retest, sometimes years later, comes back elevated.
If any of these signs show up, the reasonable sequence is: check the manometer, listen for the fan, and if either looks off, call the original installer or another certified contractor before assuming a full retest is the only next step.
Common questions
Can a system fail silently with no obvious sign at all?
A gradual fan bearing failure can sometimes reduce performance before it fails completely, without an obvious sudden change, which is part of why periodic manometer checks and eventual retesting matter even when nothing seems obviously wrong.
Is a retest the only way to confirm a suspected problem?
A retest is the definitive way to confirm actual radon levels, but checking the manometer and listening for the fan first is a reasonable, free first step before scheduling a professional visit or a new test.
Have a number you want read?
Tell us the result and your town in York County, or call and read it out. We will tell you what it points to and what a system would involve in a house like yours.
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