Top-rated humidifier repair pros.

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    Average homeowner rating
  • Verified reviews icon392
    Verified humidifier repair services reviews

Find Humidifier repair pros in O Fallon

Avatar for Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

1902 Vandalia Street, Suite 100
3.80(
80
)
Approved Pro

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services

1902 Vandalia Street, Suite 100
3.80(
80
)
Approved Pro
Customers say: Quick response
121 local quotes requested
32 years of experience

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services takes pride in being your preferred local plumbers, electricians, and HVAC technicians! In fact, more homeowners in the St. Louis Metro East & Central Illinois communities we serve, say they would call us again before any other plumbing, electrical, heating, or air conditioning service!

"This company is outstanding. I can not sing them enough praises."

Jacqueline W on May 2025

Tiger Plumbing, Heating, Air Conditioning, & Electrical Services takes pride in being your preferred local plumbers, electricians, and HVAC technicians! In fact, more homeowners in the St. Louis Metro East & Central Illinois communities we serve, say they would call us again before any other plumbing, electrical, heating, or air conditioning service!

"This company is outstanding. I can not sing them enough praises."

Jacqueline W on May 2025


Avatar for Garrett Heating & Cooling

Garrett Heating & Cooling

238 Holiday Mobile Home Park
4.50(
12
)
Approved Pro

Garrett Heating & Cooling

238 Holiday Mobile Home Park
4.50(
12
)
Approved Pro
Customers say: Super punctual
124 local quotes requested
20 years of experience

In business since 2005, you can rely on us to provide you with comprehensive heating and cooling services. Our locally and family-owned and operated business has over 25 years of experience in the industry.

"Within minutes of posting my information to replace our AC I received a call from Jeff and was scheduled for an estimate the next day. The quote was excellent and he was able to schedule the replacement within a 3 day window which was outstanding considering the heat index was over 100 degrees. He explained everything very thoroughly and got the job done quickly. Definitely recommend."

Donna F on August 2025

In business since 2005, you can rely on us to provide you with comprehensive heating and cooling services. Our locally and family-owned and operated business has over 25 years of experience in the industry.

"Within minutes of posting my information to replace our AC I received a call from Jeff and was scheduled for an estimate the next day. The quote was excellent and he was able to schedule the replacement within a 3 day window which was outstanding considering the heat index was over 100 degrees. He explained everything very thoroughly and got the job done quickly. Definitely recommend."

Donna F on August 2025


Avatar for Neli Virtual Appliance Repair

Neli Virtual Appliance Repair

143 Charlotte Ave
4.29(
575
)
Approved Pro

Neli Virtual Appliance Repair

143 Charlotte Ave
4.29(
575
)
Approved Pro
Customers say: Super punctual
33456 local quotes requested
9 years of experience

NEW! Appliance Consultation – Just $35 Get expert advice before you spend on repairs or replacements. A Neli technician will evaluate your issue and help you decide if your appliance can be fixed—or if it’s time for a new one. Virtual Appliance Diagnosis and Repair - Just $45 Service Description: Diagnose or repair your appliance virtually—no need for anyone to enter your home. Neli’s certified technicians guide you step-by-step via secure video chat. How It Works: Book online at nelihome.com or call 833-876-0900 Connect with a tech through our video platform Diagnose or fix the issue in real time Get expert advice and confidence in your next steps What’s Included: Real-time video guidance from a certified technician Diagnosis of the issue OR full repair (when possible) Step-by-step guidance using your smartphone or tablet Safe, contact-free service - no one in your home Flexible scheduling—appointments available daily Perfect For: Appliance fixes HVAC troubleshooting DIY-savvy homeowners Saving time and money on service calls

"It was an excellent experience! My old Kenmore fridge (probably from the 90s) quit cooling/defrosting. After looking to replace it and finding thanks to the pandemic refrigerators are on backorder for months, I called 3 appliance repair companies who didn't call me back. I found Neli and was able to set up an appointment at a time I picked.. An incredibly patient tech (Chris C.) came chat on at the appointed time. I waited about 5 mins as he was wrapping up another call. I walked me through the diagnosis using a virtual support app on my phone. He was able to help me with taking things apart, helped me use our multimeter, and diagnosed the problem. I can do this repair myself. He gave me the exact part numbers and told me what I need to do. All for $35 for an hour on a Sunday. I can't believe how great this was. I thought I had to replace my refrigerator, but for $35 + $111 in parts (I could have gone cheaper but chose OEM) my refrigerator will return to health. Their website lists the tools you will need for a diagnosis/repair, make sure you have them ready. For refrigerators, you need a screwdriver (flat & phillips), a socket set, a multimeter, and theoretically a pair of pliers but I didn't use them. Also make sure your phone is charged (lesson learned)."

Deborah C on November 2020

NEW! Appliance Consultation – Just $35 Get expert advice before you spend on repairs or replacements. A Neli technician will evaluate your issue and help you decide if your appliance can be fixed—or if it’s time for a new one. Virtual Appliance Diagnosis and Repair - Just $45 Service Description: Diagnose or repair your appliance virtually—no need for anyone to enter your home. Neli’s certified technicians guide you step-by-step via secure video chat. How It Works: Book online at nelihome.com or call 833-876-0900 Connect with a tech through our video platform Diagnose or fix the issue in real time Get expert advice and confidence in your next steps What’s Included: Real-time video guidance from a certified technician Diagnosis of the issue OR full repair (when possible) Step-by-step guidance using your smartphone or tablet Safe, contact-free service - no one in your home Flexible scheduling—appointments available daily Perfect For: Appliance fixes HVAC troubleshooting DIY-savvy homeowners Saving time and money on service calls

"It was an excellent experience! My old Kenmore fridge (probably from the 90s) quit cooling/defrosting. After looking to replace it and finding thanks to the pandemic refrigerators are on backorder for months, I called 3 appliance repair companies who didn't call me back. I found Neli and was able to set up an appointment at a time I picked.. An incredibly patient tech (Chris C.) came chat on at the appointed time. I waited about 5 mins as he was wrapping up another call. I walked me through the diagnosis using a virtual support app on my phone. He was able to help me with taking things apart, helped me use our multimeter, and diagnosed the problem. I can do this repair myself. He gave me the exact part numbers and told me what I need to do. All for $35 for an hour on a Sunday. I can't believe how great this was. I thought I had to replace my refrigerator, but for $35 + $111 in parts (I could have gone cheaper but chose OEM) my refrigerator will return to health. Their website lists the tools you will need for a diagnosis/repair, make sure you have them ready. For refrigerators, you need a screwdriver (flat & phillips), a socket set, a multimeter, and theoretically a pair of pliers but I didn't use them. Also make sure your phone is charged (lesson learned)."

Deborah C on November 2020


Avatar for Garrett Heating & Cooling

Garrett Heating & Cooling

238 Holiday Mobile Home Park
4.91(
116
)
Approved Pro

Garrett Heating & Cooling

238 Holiday Mobile Home Park
4.91(
116
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
22 years of experience

Garrett Heating & Cooling, are the premier heating and cooling company serving in Illinois for seven years. We do residential and commercial and pride ourselves on customer satisfaction. Call today!

"On time, easy to understand. Even though I needed much more was able to repair a few areas to keep it limping along to fit my budget"

John P on August 2025

Garrett Heating & Cooling, are the premier heating and cooling company serving in Illinois for seven years. We do residential and commercial and pride ourselves on customer satisfaction. Call today!

"On time, easy to understand. Even though I needed much more was able to repair a few areas to keep it limping along to fit my budget"

John P on August 2025


Mojack LLC

7 Aspen Circle
4.33(
6
)
Approved Pro

Mojack LLC

7 Aspen Circle
4.33(
6
)
Approved Pro
Customers say: Quick response
1 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Call Today!

"Great job"

Kim D on January 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Call Today!

"Great job"

Kim D on January 2025


Avatar for Middle Man Maintenance LLC

Middle Man Maintenance LLC

433 Douglas Ave
4.91(
11
)
Approved Pro

Middle Man Maintenance LLC

433 Douglas Ave
4.91(
11
)
Approved Pro
Customers say: Quick response
22 local quotes requested
1 years of experience

Middle Man Maintenance LLC is a small business that is dedicated to helping you out, at half the price of big business'. My services include: heating and cooling, painting, flooring, fixture install, outlets, gutter cleaning, gardening or horticultural, as well as deck repair.

"Taylor arrived when he said he would. Knowledgeable and fully prepared with all the tools and materials he needed for the job. Nice guy, easy to talk to and work with."

Randy C on September 2025

Middle Man Maintenance LLC is a small business that is dedicated to helping you out, at half the price of big business'. My services include: heating and cooling, painting, flooring, fixture install, outlets, gutter cleaning, gardening or horticultural, as well as deck repair.

"Taylor arrived when he said he would. Knowledgeable and fully prepared with all the tools and materials he needed for the job. Nice guy, easy to talk to and work with."

Randy C on September 2025


Razor Repair

5 Fieldcrest Drive
No reviews yet

Razor Repair

5 Fieldcrest Drive
No reviews yet
1 years of experience

Razor Repair is a family and disabled veteran owned A/C and Refrigeration Diagnostic and Repair service business, while also providing Applicance Repair and Gardening services. Our vision is to not only do the job right the first time and at a reasonable time but to pass on our savings to every customer at a 15% lower price than the national average.

Razor Repair is a family and disabled veteran owned A/C and Refrigeration Diagnostic and Repair service business, while also providing Applicance Repair and Gardening services. Our vision is to not only do the job right the first time and at a reasonable time but to pass on our savings to every customer at a 15% lower price than the national average.



BIG BANG HVACR LLC

818 Lincoln Highway
No reviews yet

BIG BANG HVACR LLC

818 Lincoln Highway
No reviews yet
3 years of experience

BIG BANG HVACR is an HVAC (Heating, Ventilation, Air Conditioning) company that keeps clients "banging cool" or "banging warm" for the particular season. The company does an outstanding services on AC units, Refrigerators, Mini Fridge, Standard Freezers, Deep Freezers, Gas Stoves, Electric Stoves, Furnaces, Dryers, Thermostat Installations, Toilet Installations and does troubleshooting and maintenance repairs on non-working systems. I service St. Clair County, Madison County (Collinsville and Edwardsville), St. Louis County and St. Louis City. Anyone who lives outside of the target areas, must contact me directly before booking. Please make sure to book the correct service. Please note if you are using a credit card to pay for the remaining balance, there will be a 4% transaction fee through my booking site.

BIG BANG HVACR is an HVAC (Heating, Ventilation, Air Conditioning) company that keeps clients "banging cool" or "banging warm" for the particular season. The company does an outstanding services on AC units, Refrigerators, Mini Fridge, Standard Freezers, Deep Freezers, Gas Stoves, Electric Stoves, Furnaces, Dryers, Thermostat Installations, Toilet Installations and does troubleshooting and maintenance repairs on non-working systems. I service St. Clair County, Madison County (Collinsville and Edwardsville), St. Louis County and St. Louis City. Anyone who lives outside of the target areas, must contact me directly before booking. Please make sure to book the correct service. Please note if you are using a credit card to pay for the remaining balance, there will be a 4% transaction fee through my booking site.


Crump HVAC/R and Weatherization

5.00(
1
)

Crump HVAC/R and Weatherization

5.00(
1
)
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!

"They did a very good job communicating. Made an agreement and stuck to it. Was very professional and wonderful service. Highly recommend. 10/10"

Jessica I on December 2023

We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!

"They did a very good job communicating. Made an agreement and stuck to it. Was very professional and wonderful service. Highly recommend. 10/10"

Jessica I on December 2023

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Humidifier Repair questions, answered by experts

Most HVAC service calls include diagnostic fees, which could include checking on a specific issue you’re experiencing or running through a routine inspection checklist. If you called for a particular problem, the service call will also include an estimate to fix the issue, including materials and labor. Depending on your HVAC technician and the service you requested, you might also get a general inspection of your system components to ensure everything is working as intended.

Regularly clean or replace filters, check humidity levels, and descale water reservoirs.

Several styles of HVAC dampers exist, some with motors and some without. The various types include butterfly, blade, louvered, guillotine, and more. The names describe their construction style and how air moves through them. Motorized versions work through wiring connected to a control panel within the HVAC system. Manual versions allow an operator to decide which way to send the airflow and make the adjustment by hand. 

Professionals can enhance an A/C system’s longevity by optimizing settings and performing thorough checks on all system components.

Whole-house humidifiers work, but the home itself determines their efficacy. If you have a drafty house or an old home with wooden floors that leak air and moisture, the humidifier must work much harder to keep moisture levels constant. Because of this, we recommend doing an air test of your home to determine the best type of humidifier and any work that needs to be done to install it. 

By submitting this question, I acknowledge and agree that Angi may publicly display my name, city, state, and question on the website for professionals and others to see.

The O Fallon, IL homeowners’ guide to humidifier repair services

From average costs to expert advice, get all the answers you need to get your job done.