Radon System Repair & Fan Replacement in Grand Junction, CO

Grand Junction Radon Mitigation brings 20 years of experience repairing radon mitigation systems throughout Mesa County, which is in EPA Radon Zone 1. If a radon fan stops working, the system no longer protects your home, and indoor radon may climb back up toward its pre-mitigation level. We repair and replace radon fans on sub-slab, sub-membrane, and crawl space systems of every brand. Our radon mitigation technicians are licensed by the State of Colorado and NRPP-certified. Each repair is confirmed with a manometer reading and a post-repair radon test.

Grand Junction Radon Mitigation is committed to improving indoor air quality for Western Colorado homes and businesses with reliable testing, mitigation, repairs, and customized solutions. Our team offers certified, dependable service, and provides quality workmanship.

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Signs Your Radon Mitigation System Needs Repair

Because radon fans operate 24/7, they usually last 5 to 10 years. Keep an eye out for these warning signs.

Radon Fan Not Running, Silent, or Making Noise

A silent or noisy radon fan may be failing. Check the U-tube manometer: equal liquid levels indicate no suction. For digital gauges, check for alerts.

Sound → Likely cause

Grinding → Worn bearings
Rattling → Loose parts, debris, or loose mount
Loud hum or buzz → Motor or electrical strain
Vibration through the pipe → Unbalanced fan wheel or loose bracket

Rising Radon Levels, Cracked Pipes, or Leaks

EPA’s action level is 4.0 pCi/L, and EPA recommends considering action between 2.0 and 4.0 pCi/L. If a retest falls in that range or higher, the system is not performing well, whether the problem is a weak fan, a slab crack, or a leak.

Proper radon system maintenance includes retesting every 2 years and examining exposed piping several times a year. Check for cracks, separated joints, water stains, or gaps at the roof penetration, because any of those can break the vacuum seal.

What to Do If Your Radon Fan Stops Working

Check power. Inspect the breaker, any switch, and the outlet. Check the manometer or alarm. A level fluid reading or an active alarm usually means the fan is not creating suction.

Do not open the fan or handle the wiring. Contact us right away.

Retest after the repair to make sure levels have dropped again.

Radon is a long-term health risk, but a dead fan should not be left for weeks.

Radon System Diagnosis & Common Repairs

We inspect the fan, electrical connections, piping, and suction points in that sequence so we can identify the actual cause before suggesting a fix.

Radon Fan, Electrical & Mounting Repair

We test the outlet, breaker, GFCI, and wiring. Sometimes a fan that seems dead only has a tripped breaker, a loose wire, or a corroded connection. We also tighten loose brackets, replace worn vibration isolators, and replace broken manometers or system alarms. Radon fans are sealed units, so if the motor has failed, we replace the fan instead of rebuilding it.

Radon Pipe, Seal & Suction-Point Repair

We reseal or replace cracked PVC and loose couplings, and we reseal the suction pit cover, slab cracks, and sump lids. We also make sure the roof or exterior exhaust is clear of debris and nests. If the original suction point is not sufficient for your soil, we can install a second one.

Radon Fan Replacement

When to Replace a Radon Fan Instead of Repairing It

Replace the fan if it has quit running, hums but will not spin, grinds or rattles, shows moisture damage or corrosion, or is nearing the end of its 5 to 10 year lifespan. Repairing an aging fan often leads to another failure within months.

Choosing and Installing a Replacement Radon Fan

We size the new fan to your system rather than using a one-size-fits-all unit:

CFM rating: airflow pulled from beneath the slab
Static pressure: needed for dense soil or clay
Pipe size: matches your 3" or 4" PVC
Noise (sones): matters for attic and indoor installs
Location rating: indoor, attic, or outdoor

We service and replace all major brands, including RadonAway and Fantech. New fans typically carry a manufacturer radon fan warranty of 5 years. Most replacements take one to two hours. We turn off the power, remove the old fan, replace any cracked couplings, mount the new fan, and seal the joints with PVC cement. Before we leave, we verify suction on the manometer.

Radon System Repair for Homes, Crawl Spaces & Commercial Buildings

Residential & Crawl Space Radon System Repair

We repair sub-slab depressurization, sub-membrane, and drain tile systems. In most homes, repairs are completed in a few hours, and we record levels before and after. Crawl space systems rely on a sealed vapor barrier just as much as the fan, so we also inspect for torn or shifted membrane, open seams, and humidity damage to the fan. Thinking about a new system? See our crawl space radon mitigation page.

Commercial, Multifamily & Real Estate Radon System Repair

We repair multi-fan and zoned systems and balance suction across them. We work around tenants and supply documentation for leases and real estate transactions. Did the buyer’s test come back high? We repair or replace the system and provide written test results for buyers, sellers, and agents.

Radon Fan Replacement & Repair Cost in Grand Junction, CO

	Repair	Replacement
Typical fixes	Joint reseal, manometer, bracket	New fan and any damaged fittings
Typical cost	$150 to $600	$400 to $700
Best when	Fan is working and within its lifespan	Fan is failing or near end of life

What Affects Radon Repair Cost

Fan model and size
Accessibility (attic and exterior fans take longer)
Damaged piping or seals
Electrical work
Roof or wall penetration resealing

Post-Repair Radon Testing

How We Verify a Radon Repair

We confirm a visible pressure difference on the manometer, check airflow at the exhaust, listen for smooth fan operation, and re-inspect all seals. The manometer confirms the system is drawing air. Only a radon test proves that radon has actually gone down.

When to Re-Test After a Repair & If Levels Stay High

Retest between 24 hours and 30 days after the system is back up and running. For most homes, a short-term test lasting at least 48 hours is enough. In homes with fluctuating readings or a recent sale, a 90-day or longer test helps account for seasonal variation. After that, retest every 2 years. If levels remain high, we search for new slab cracks, add a second suction point, or increase fan capacity, and we explain each option before any work is done.

Why Choose Our Radon Repair Service in Grand Junction

We work on radon mitigation systems across the Grand Valley, regardless of who installed them or which brand of fan is involved. If your system has gone quiet, your alarm is sounding, or a re-test came back higher than expected, we diagnose the cause and fix it.

Our technicians bring specific experience with the conditions in this area. Mesa County sits in EPA Radon Zone 1, and we see a wide range of system designs and failure points as a result.

Here's what sets our service apart:

Fast response for alarming systems or sudden fan failure
All-brand compatibility we service and replace fans regardless of manufacturer
Diagnostic accuracy using manometer readings and airflow checks before any repair
Transparent pricing with no guesswork about what a repair will cost
Local availability throughout Grand Junction and the surrounding Grand Valley

We treat a radon system as ongoing equipment, not a one-time install. Fans run continuously, and like any motor under constant load, they wear down over time.

When you call us, we focus on getting your system back to proper function, not just patching a symptom. We check the full system (piping, seals, and fan performance) to confirm the repair addresses the actual problem.

Schedule Radon System Repair or Fan Replacement in Grand Junction

A failed fan or a loud, alarming system should not wait.

We offer radon repair near you in Grand Junction, Clifton, Palisade, Orchard Mesa, Redlands, Fruitvale, and Fruita, and we can usually assess your system within a few days of your call.

Before your appointment, it helps to note a few details:

Whether your fan has gone silent or is running louder than usual
Any recent re-test results showing elevated radon levels
The age and brand of your current system, if known
Whether a manometer gauge is reading outside its normal range

FAQs

Typically 5 to 10 years. The manufacture date appears on a sticker on the fan. Fans in humid crawl spaces may wear out faster.

A silent fan, a level manometer, grinding or rattling, or a retest at or above 4.0 pCi/L all point to a problem.

Radon exposure is a long-term health risk, and EPA says no level is known to be fully safe. Once the fan stops, levels can rise again toward pre-mitigation conditions, so arrange repair quickly and retest afterward.

No. The fan is meant to run nonstop. Turning it off removes the protection.

We do not recommend it. Wiring errors, poor sealing, or the wrong fan can lower performance or create safety risks. In Colorado, radon mitigation work must be performed by a state-licensed professional.

Verify a current Colorado radon license through the state licensing lookup at dpo.colorado.gov, along with NRPP or NRSB certification. Also ask about warranty terms for both the fan and labor.

Yes. Test between 24 hours and 30 days after the repair. Our service includes a post-repair test. EPA’s action level is 4.0 pCi/L, and EPA recommends considering action between 2.0 and 4.0 pCi/L.