Radon mitigation · Repairs & upgrades
Radon system repairs & upgrades
A radon system only protects you while it's actually working. If your fan has failed, your levels never really dropped, or an old install won't pass a real-estate re-test, we'll diagnose it and fix it — usually without replacing the whole system.
Get a free quoteCommon repairs & upgrades
- Failed or noisy fan. Radon fans run continuously and eventually wear out. A replacement is quick and restores the system.
- Levels never dropped below 4 pCi/L. An underperforming system often needs a higher-CFM fan, an additional suction point, or better sealing — not a teardown.
- Non-compliant or DIY installs. Discharge below the roofline, no manometer, indoor fan placement, or improper routing — brought up to Colorado / AARST standards.
- Real-estate re-tests. A home under contract that fails its radon re-test, fixed and re-verified on the transaction timeline.
Levels rising on a system that used to work?
A common call: the home has a mitigation system, a consumer monitor (an Airthings or similar) has been reading fine for months — and then the 7-day average starts creeping up. The fan is audibly running. Nothing obviously changed. Here's the same diagnostic sequence our mitigator walks through on the phone, in order:
- Rule out weather first. Wind storms, heavy rain, snowmelt, and extreme cold all spike indoor radon temporarily. Sustained high readings in calm, mild weather point at the system instead.
- Read the manometer — the U-shaped tube with colored liquid on the pipe. The two columns should sit clearly offset; how far tells us how hard the fan is actually pulling. A weak reading on a “running” fan means it's spinning but not moving much air.
- Check the sump seal — especially after other work. Sump-tied systems are the most effective installs there are, but only while the lid is airtight. A plumber or sump-pump tech who opened the basin and didn't re-seal it leaves the fan pulling basement air instead of soil gas. This is the single most common culprit behind a slow rise.
- Identify the fan. The model is printed on the housing outside. Many older installs run standard fans moving far less air than current equipment — an upgraded fan plus a re-sealed sump often takes a home from “hovering near 4” to comfortably low.
One more honest note: homeowner monitors are genuinely useful for spotting trends like this — but they aren't certified measurements. Any repair we do ends with a certified test so the “fixed” is documented, not assumed.
What it costs
Minor repairs — a fan swap, a manometer, a discharge re-route — start around $499. Bigger upgrades (adding a suction point, re-piping) are quoted after a look at the existing system. Either way it ends with a re-test to confirm the home is finally below the action level.
Not sure whether you need a repair or a full system? Start with the mitigation overview or re-test your home to see where it stands first.
Free quote · NRPP-certified
Get a free radon system repair quote.
Tell us what your system is doing (or not doing) and we'll diagnose it — most fixes don't need a full replacement. NRPP-certified quote within 24 hours.
- 24-hour quote turnaround
- Installed in 4–6 hours
- Post-install re-test included
- NRPP / AARST certified
Or call us at (866) 398-9858 — same-day response during business hours.