Existing systems
Radon Fan Replacement
The fan is the only moving part of a radon system, so it draws attention when something changes. Replacing it is often the right answer — but it is an answer that should follow an assessment, not precede one.
Signs a fan evaluation may be warranted
- The fan has visibly or audibly stopped running.
- The system monitor reading has dropped or gone level.
- The fan has become noticeably louder, or has developed a rattle or hum.
- Radon levels measured in the home have risen since the system was installed.
- The fan is warm, vibrating unusually, or cycling.
- The breaker or switch serving the fan has tripped repeatedly.
Age alone does not prove failure
Radon fans are continuous-duty devices, and manufacturers publish their own warranty terms. Those terms differ by model and are not a guarantee of service life.
We do not publish a universal lifespan figure, because a fan's service life depends on the model, the installation conditions and the environment it runs in. A running fan on an old system is not automatically due for replacement — and a young fan is not automatically healthy.
What replacement involves
| Step | What happens |
|---|---|
| Assessment | Confirm the fan is the actual problem: check power, suction, piping and the system monitor. |
| Sizing | Select a replacement matched to measured system conditions, not just to the old model number. |
| Removal and fitting | Disconnect the old unit and fit the new one with sealed connections. |
| Electrical check | Confirm the supply and any switch or disconnect are sound and to code. |
| Verification | Confirm the monitor shows expected suction, then test radon to document the result. |
Why the whole system gets evaluated
A fan that fails early is sometimes a symptom rather than a cause — restricted airflow, condensation issues or a compromised pipe run can shorten its life. A like-for-like replacement in that situation buys time, not a fix.
Building changes since installation also matter: a new addition, replaced drainage or slab work can alter what the system needs to do.
Cost
We do not publish a fan-replacement price. Published national ranges describe whole-system residential installation, and applying them to a component swap would misrepresent them. Cost depends on the replacement unit, fan location and access, the condition of the electrical supply, and whether other system work is needed.
After replacement, test
The new fan should be followed by a radon measurement. The monitor confirms suction; the test confirms the indoor level.
Request fan evaluation and replacement quotes
Share your test result, foundation type and project details. We pass your request to independent radon professionals — we do not perform the work ourselves.