Radon Fan Replacement and System Repair in Milwaukee, WI

A radon system only works while its fan runs. If your manometer reads zero, the fan has gone silent, or it has started rattling or humming loudly, radon can build back up without any warning. Milwaukee Radon Mitigation handles radon fan replacement and system repair across Greater Milwaukee, including systems installed by other companies. Brian Thompson, an NRPP-certified radon mitigation specialist, replaces the fan, checks the piping, seals and exhaust, and makes sure the system is pulling suction before he leaves.

A Stopped Radon Fan Means Radon Comes Back

Without the fan, a sub-slab system is just a pipe. Radon levels can return to where they were before the system went in, and most homeowners do not notice because radon has no smell. Fans run around the clock, so they wear out in time; in Brian’s experience most last 7–12 years, and outdoor fans also face Milwaukee winters.

If your fan has failed, replace it soon and retest afterward. The EPA recommends retesting every two years after mitigation.

Signs Your Radon Fan Is Not Working

The manometer reads zero. The liquid in the U-tube is level on both sides, so there is no suction.
No hum or vibration. Put a hand on the pipe near the fan. A running fan has a slight vibration.
New, loud noise. Grinding, rattling or a high-pitched whine often means worn bearings. See why radon fans get loud.
The alarm is sounding, if your system has one.
Water or ice in the pipe or fan housing.
A retest shows radon back above 4.0 pCi/L.

Wondering how long fans usually last? Read how long radon fans last.

Radon Fan Replacement and System Repair Services

Fan replacement

We remove the old fan, match a new fan to your system’s pipe size and the suction your slab needs, and install it with new couplers. Sometimes the right answer is a different fan than the one that failed, for example if the original was undersized. Brian carries spare fans, so most swaps happen on the same visit and take under an hour. Fans typically draw about 40–120 watts, depending on the home and fan, and the electrical connection is made by a licensed electrician. Every new fan carries a 5-year fan warranty, backed by our lifetime workmanship warranty.

System repair

Cracked or disconnected pipe, failed seals at the slab or sump, loose supports, or an exhaust that ends too close to a window. We fix what is wrong and explain why.

Systems installed by someone else

Many calls come from homeowners who bought a house with a system already in it. We work on any brand and any installer’s system.

Exhaust rerouting

If the stack vents too low or near windows, we can reroute it to improve the exhaust and bring it in line with current standards. If a working fan is simply too loud, we can fit a muffler (silencer).

Fan Replacement for Homes, Rentals and Commercial Systems

Residential

Most fan replacements are single-family homes and rentals, often in houses bought with a system already in place.

Commercial

Larger buildings may have several fans. We service multi-fan systems, can review the full design, and offer after-hours visits for businesses. See commercial radon mitigation.

Daycares

Wisconsin DCF requires licensed child care providers to mitigate above the EPA action level. A failed fan should be replaced and the building retested.

Fan Replacement Done Right

Mike B.’s system was installed by another party near Madison in 2013. Brian replaced the fan, rerouted the stack to improve the exhaust, and reviewed the entire system.

      
   Milwaukee Radon Mitigation
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   Matthew Ware 
 
 
 
 Trustindex verifies that the original source of the review is Google. Brian is the epitome of professionalism. We moved into our home a few months ago that had a radon mitigation system installed in 2011, but it was not performing well, and our levels were between 4-9 pCi/L. Brian came out immediately and thoroughly assessed our system. He discovered several ways our system could be improved and in detail went through the process and sent a quote in less than 24 hours. He was extremely kind, personable, thoughtful and spent time explaining the process of radon movement and how the mitigation would best function in our current situation. We had existing cedar siding issues with a small amount of paint that was chipped off in the process. He wanted to paint the area for us and then offered a second coat when he returned to pick up our professional post-installment radon test. I have referred him to family and friends. Brian has far exceeded our expectations and gone above and beyond. His communication was phenomenal. He arrived a few minutes early to every appointment. Our radon level was near atmospheric levels (0.4 pCi/L) within 24 hours following the installment. We can’t thank him enough for his wonderful work and our peace of mind.
  
 
      Posted on Google  
   
   ZER HER 
 
 
 
 Trustindex verifies that the original source of the review is Google. I can’t say enough great things about Brian and his team at MKE Radon Mitigation! They were absolutely excellent to work with from start to finish.

One of the things I appreciated most was their communication. Brian was responsive, professional, and kept everyone informed throughout the process, which makes such a difference when you’re working through a real estate transaction.

We had a very tight nine-day closing timeline, and they were able to get the radon mitigation system installed within that timeframe. They also worked with my sellers to allow payment at closing, which was incredibly helpful because they had already invested a significant amount of money into foundation work.

I truly appreciate working with people who go above and beyond to create an excellent customer experience. Brian and his team made the process easy, accommodated our tight timeline, and helped us get the deal across the finish line.

If you need radon mitigation, I highly recommend MKE Radon Mitigation. Great service, great communication, and a team that genuinely cares about their customers!
  
 
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   Aryanna Wocelka 
 
 
 
 Trustindex verifies that the original source of the review is Google. Brian was wonderful to work with! We wanted someone we could trust given the safety of our family. He was very helpful in answering all of our questions, is extremely knowledgeable and made the process easy. We were so impressed with the seamless work he completed, how quickly we were able to get scheduled and unmatched communication. There’s no hesitation to have Brian help with your Radon needs, we’d hire him over again and will recommend to our friends and family. Thank you, Brian!
  
 
      Posted on Google  
   
   Lauren Nicole 
 
 
 
 Trustindex verifies that the original source of the review is Google. We recently had Brian out to add a radon mitigation system to our 100 year old house. We thought we had drain tiles, however, it turns out we don't. Brian did a great job installing the system and providing clear communication on how the lack of drain tile adds extra time to the installation process. Brian was great at explaining the system and answering any questions we had. The installation looks great and is extremely clean. I would absolutely recommend Milwaukee Radon Mitigation!
  
 
      Posted on Google  
   
   Ty Ash 
 
 
 
 Trustindex verifies that the original source of the review is Google. Brian was great and super responsive! In about five days, he had our radon system repaired, re-tested, and ready to go including a weekend visit. Definitely will work with them again and share with our friends.
  
 
      Posted on Google  
   
   Jane Maree 
 
 
 
 Trustindex verifies that the original source of the review is Google. Working with Brian was such a pleasure. Communication was consistent. He was precise and fair with his estimate and price. He went above and beyond to ensure the unit was installed in a place that was aesthetically pleasing. He guarantees the unit will work and will show up if there’s issues down the road. 10/10!
  
 
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   Chelsea Weaver 
 
 
 
 Trustindex verifies that the original source of the review is Google. Brian recently replaced the fan that went out in our radon mitigation unit. He was extremely responsive and professional. He got us a quote quickly, pointed out another minor issue that we could get fixed for a very reasonable price (but was not at all pushy about it--just an FYI we wouldn't have known about otherwise). He was very flexible in scheduling, as we personally don't have simple schedules. He arrived on time, performed the job quickly, and payment was super straightforward.

I'd highly recommend Brian and his company for any of your radon needs.
  
 
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   Luke Schroeder 
 
 
 
 Trustindex verifies that the original source of the review is Google. Needed to write a review for Milwaukee Radon after our stellar experience working with Brian to install our home radon mitigation system. Brian is friendly, an excellent communicator, and both knowledgeable and experienced which was on full display as he walked us through the process and approach to crafting the right solution for our home. Additionally, he does the installs himself so you know that you will have an experienced installer doing the job for you which is great!

But what I was most impressed by was Brian’s integrity and dedication to detail. Brian clearly takes pride in his work: not just in doing the job but doing the job well. And that’s something you definitely can’t find just anywhere. I would 100% recommend MKE Radon to anyone looking into a home radon mitigation install. Based on my experience, I’m sure you’ll be very pleased by the job that is done and in working with Brian!
  
 
      Posted on Google  
   
   Jennifer Ferrera 
 
 
 
 Trustindex verifies that the original source of the review is Google. Brian was so responsive and easy to communicate with. He was able to fit in our radon mitigation on a tight timeline and get our home’s radon to a safe level. I would recommend his services to anyone in need.
  
 
      Posted on Google  
   
   Nicholas Matula 
 
 
 
 Trustindex verifies that the original source of the review is Google. Couldn't be happier with my radon mitigation system and installation. Brian is super friendly, responsive, and knowledgeable. Was able to obtain a 95% reduction and reach outdoor radon levels. I wouldn't recommend anyone else.

Radon Fan Replacement Cost: What Goes Into the Price

A radon fan replacement is usually a much smaller job than a new system. Your price depends on:

Factor	Why it matters
Fan model	Fans are sized to the suction a slab needs; higher-suction fans cost more.
Fan location	An attic or garage fan is easier to reach than one high on an exterior wall.
Pipe and fittings	Couplers often need replacing; cracked pipe adds parts.
Electrical	A fan with no proper outlet or switch needs electrical work by a licensed electrician.
Extra repairs	Resealing, new supports, an exhaust reroute or a new manometer.

Fan replacements are quoted per job, so request a free quote. You can also send a photo of your fan through the quote form for a quote before a visit. Every replacement fan carries a 5-year fan warranty, and the work is covered by our lifetime workmanship warranty.

Planning a full new system instead? See our radon mitigation cost guide.

Why Homeowners Call Us When a Radon Fan Fails

Certified diagnosis. Brian Thompson is NRPP certified in radon measurement and mitigation, so we check the whole system, not just the fan.

Any installer, any brand. We service systems we did not install, and carry spare fans for same-visit swaps.

Honest advice. If a cheap fix is all you need, that is what we recommend.

Clean work and a clear explanation of what was wrong.

Rated 5.0 on Google by 40+ customers.

Is Your Radon Fan Quiet, Loud or Dead?

Tell us what you are seeing and we will get your system working again. Brian offers 24/7 emergency fan service and carries spare fans for same-visit swaps.

Repairs That Meet Radon Mitigation Standards

Replacement fans are installed outside living space, in line with ANSI/AARST standards, with an exhaust that discharges above the roofline and away from windows. We label the system and confirm suction on the manometer when the work is done.

How Radon Fan Replacement Works

1. Diagnose

We check the fan, electrical supply, manometer, pipe, seals and exhaust to find the real cause.

3. Replace and repair

We install the new fan (most swaps take under an hour), replace couplers, fix leaks and reroute the exhaust if needed.

2. Quote

You get a clear price for the fan and any repairs before work starts.

4. Verify

We confirm suction on the manometer and recommend a retest to make sure your level is back below 4.0 pCi/L.

1. Diagnose

We check the fan, electrical supply, manometer, pipe, seals and exhaust to find the real cause.

2. Quote

You get a clear price for the fan and any repairs before work starts.

3. Replace and repair

We install the new fan (most swaps take under an hour), replace couplers, fix leaks and reroute the exhaust if needed.

4. Verify

We confirm suction on the manometer and recommend a retest to make sure your level is back below 4.0 pCi/L.

What a Typical Milwaukee Fan Replacement Looks Like

Most fan calls come from homes within about 25 minutes of our West Allis base, often houses bought with a system already in place. Brian checks the fan, manometer, pipe and seals, swaps in a fan from the spares he carries, usually in under an hour, and verifies suction before he leaves. A licensed electrician handles any wiring changes, and we recommend a retest afterward.

Related Radon Services

Radon Mitigation

System beyond repair, or never installed? We design a new one.

Radon System Inspection

Not sure the fan is the problem? A full inspection checks every part of the system.

Radon Testing

After a fan swap, a professional test of at least 48 hours shows your new level.

Radon Fan Replacement FAQs

Still have questions?

Our team is available to provide clarity and additional information.

How much does it cost to replace a radon fan?

The cost to replace a radon fan depends on the fan model your system needs, where the fan is mounted, and whether pipe, couplers, seals or wiring also need work. A straightforward residential swap is usually far less than a new system. Fan replacements are quoted per job; send a photo of your fan through our quote form for a quote before a visit. Every new fan carries a 5-year fan warranty.

Can you replace a radon fan yourself?

It is possible, but most homeowners are better off with a certified pro. The job involves electrical work, cutting and sealing pipe, choosing the right fan for your slab, and keeping the exhaust where standards require it. A wrong fan or a leaky coupler can leave you with radon you do not know about. If you still want to do it yourself, Brian can help with design advice and parts.

How do I know my radon fan has stopped working?

The clearest sign your radon fan has stopped working is a manometer reading of zero, with the liquid level on both sides of the U-tube. Other signs are no hum or vibration at the pipe, a sounding alarm, or a new grinding noise. If you see any of these, call for service and plan a retest.

Should a radon fan run all the time?

Yes. A radon fan is designed to run 24 hours a day, every day. Turning it off lets radon build back up under the slab and into your home within hours to days. Do not put it on a timer or a switch you might flip off. If the noise bothers you, we can add a muffler (silencer) or relocate the fan.

Who fixes radon fans near Milwaukee?

Milwaukee Radon Mitigation fixes radon fans across Greater Milwaukee, from our base in West Allis. Owner Brian Thompson is an NRPP-certified radon mitigation specialist who services systems from any installer, in all 19 communities we cover, with 24/7 emergency fan service. Call (414) 455-7279 or request a free quote to get your system running again.

Get Your Radon System Running Again

Send a photo of your fan and manometer with the quote form, and we will tell you what we think is wrong, often with a quote before a visit.

Radon won't wait, why should you?

Contact Milwaukee Radon Mitigation today for expert radon testing, mitigation, and system installation services in Milwaukee, WI. Ensure a healthy indoor environment for your family by reaching out to our certified professionals for reliable and efficient radon solutions.

Phone Number

414-455-7279

Email Us

milwaukeeradon@gmail.com

Address

6301 West National Avenue West Allis, WI 53214

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