What causes condensation on air vents?

• <div><p>Condensation forms when warmer, outside air combines with cooler air in your ductwork. This can happen when there are leaks in your air ducts, your HVAC system has a dirty air filter, or there’s a lack of insulation around the ducts. To prevent it from happening, replace your HVAC filters as directed. Also, once every five years, hire a <a href="https://www.angi.com/nearme/air-duct-cleaning/">local air duct cleaner</a> to clean and inspect them.</p></div>

What should you do to prepare for AC repair?

• <div><p>There are a few things you can do to make your AC repair technician’s job easier and your home more comfortable while you wait for AC repair:</p><ul><li><p>Cut back trees, shrubs, and weeds around the outdoor compressor </p></li><li><p>Clear a pathway inside and outside to your AC components</p></li><li><p>Set up a ladder for attic access if necessary</p></li><li><p>Pull your window AC out of the window and place in an easily accessible spot</p></li><li><p>Supplement with fans and open windows to help keep your house comfortable</p></li></ul><p></p></div>

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Q: Why is my HVAC system so loud?

• <div><p>When your HVAC system is loud, a few different causes are possible. If you have loose connections or bolts in the hardware, they can rattle as the system runs and vibrates. If you have an extremely dirty furnace filter, it could cause the system to generate noise. More commonly, an excessively loud HVAC system indicates a malfunction in the system. You may have a blower motor that is close to failing or a compressor that is breaking down. These issues require an immediate inspection.</p></div>

Q: Why is the AC drip pan not draining?

• <div><p>An AC drip pan may stop draining if there&rsquo;s a clog where the drip pan connects to the drain line. Clogs can form from a lack of cleaning or from rust or corrosion buildup. Cleaning the drip pan at least once per month lowers the chances of debris clogging the drain line. </p></div>

Q: How do you fix a weak AC airflow?

• <div><p>Dirty filters are almost always the cause of poor airflow, so they should be regularly cleaned and then replaced as needed. The fan blades can also get dirty, so they should be cleaned when the unit is turned off. Make sure that the outdoor area around the back of the unit is unobstructed. Trees, shrubs, trash, and other objects could be too close to your unit.</p></div>

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Verified Reviews for Heating And Air Conditioning Service pros in Hays, MT

*The Angi rating for Heating And Air Conditioning Service companies in Hays, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Hays, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

Last update on November 01, 2025

Reviewed in November 2024
We had previously had four windows and one siding door installed in the summer and were happy with the process. We knew when the company started making entry doors that we would purchase a front entry door and kitchen door to replace older doors that had gaps around the frame where cold and heat...
Renewal by Andersen of Montana
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Reviewed in April 2023
Highly skilled, professional plumber. Treated my wife and I with the upmost dignity and respect. Tobin did a major repair of our homes boiler and heating system. System needed major repair due to damage from frozen pipes. We would highly recommend Bridger Creek Plumbing.
Bridger Creek Plumbing, LLC
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Reviewed in October 2017
Phil was a great technician was very polite, knowledgeable and Front office was kind and professional. I will Superior Air again for my units servicing.
Superior One Hour Air Conditioning and Heating
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Reviewed in March 2015
I had them send everything to the store and everything was in good condition. They were wonderful to work with. They always have the products that I need and I like going there. They are always happy to help me. I ordered them online and I picked them up. The shipping is free to the store.
HOME DEPOT INC
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Reviewed in March 2014
Excellent job done under trying circumstances. Get your air ducts cleaned using Mr. C's!!!
Mr C's Chimney & Air Duct Cleaning
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Reviewed in February 2014
Installed heating system. Air conditioning unit will be installed this spring. So far they have been wonderful to work with. Crew was professional and prompt. We love the heating system. Will update when we have air-conditioning unit installed.
Comfort Heating & Air Conditioning LLC
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Reviewed in September 2013
He arrived after our agreed time however called before and explained that he'd be late. This clearly demonstrates that he respects my time and me. He carefully placed drop cloths around my woodstove, then checked around the pipe for safety issues. He noted and, using some fiberglass...
Buffalo Chimney & Stove Installation
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Reviewed in April 2013
They installed a new furnace for us. The price was fair, they were prompt and courteous. They did good work in a timely fashion and they cleaned up the area nicely as well as dispose of the old one. I would definitely use them again. We also called them to check out and service our central...
MIDWEST HEATING & COOLING
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Find Heating and air conditioning pros in Hays

Neli Virtual Appliance Repair

Neli Virtual Appliance Repair

Customers say: Super punctual

31567 local quotes requested

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

"Great! The technician helped us to locate the issue and explained how to fix it ourselves. This was my 3rd time using NeliHome. They are my first go to for diagnosing an appliance issue."

Jennifer Y on October 2025

"Great! The technician helped us to locate the issue and explained how to fix it ourselves. This was my 3rd time using NeliHome. They are my first go to for diagnosing an appliance issue."

Jennifer Y on October 2025

Aire Serv of Kalispell

2861 MT Hwy 82

No reviews yet

Aire Serv of Kalispell

2861 MT Hwy 82

No reviews yet

32 years of experience

Aire Serv of Kalispell is well-established in the Flathead Valley for over 20 years. We specialize in heating and cooling system upgrades or replacements, emergency service, and system tune-ups. All of our pricing is upfront, and we guarantee our work. We provide service to Bigfork, Kalispell, Swan Valley, Columbia Falls, Whitefish, Polson and the rest of the Flathead Valley.

Additional DBA - Krell Industries. Family owned & operated. Nationwide service.

Second Nature (Formerly FilterEasy)

333 Fayetteville St

5.00(

)

Second Nature (Formerly FilterEasy)

333 Fayetteville St

5.00(

)

Customers say: Quick response

Recommended by 100% of Angi customers

Second Nature, formerly FilterEasy, empowers its members to achieve long-lasting, sustainable home wellness with convenient subscription plans, including high-quality home air filters and refrigerator water filters. We exist to simplify home wellness, to make it so easy and convenient that it becomes second nature. Learn about our products and subscribe at www.SecondNature.com/home.

h.j gilchrist & co.

Po Box 1247

4.00(

)

h.j gilchrist & co.

Po Box 1247

4.00(

)

Customers say: Quality work

46 years of experience

Been proudly service great falls and surrounding area since 1979. We specialize in seamless steel siding, soffitt, fascia, trim & steel rain gutters and down spouts. We have worked with all types of siding, steel and asphalt roofs, windows, doors, etc....dedicated to serving the great people off great falls leaving with you a piece of mind that your getting a top end job that will take it easy on your check book. Sincerely Harold & Nick gilchrist.

"Nice job but took 5 months to start from estimate date. Please be sure to get every point and conversation with Harold in writing and stay with Harold until he gives you a receipt for all money paid. Be sure to immediately get every piece of work completed before he is paid. He will drag it out. Do not go with just his word as he does not back up he verbal promises."

Annette C on June 2020

"Nice job but took 5 months to start from estimate date. Please be sure to get every point and conversation with Harold in writing and stay with Harold until he gives you a receipt for all money paid. Be sure to immediately get every piece of work completed before he is paid. He will drag it out. Do not go with just his word as he does not back up he verbal promises."

Annette C on June 2020

Big Sky Alternative Heat

P.O. Box 9

No reviews yet

Big Sky Alternative Heat

P.O. Box 9

No reviews yet

Free onsite estimate

Kims Heating & AC-Hansen Sheet Metal

1523 US Highway 2 N.

No reviews yet

Kims Heating & AC-Hansen Sheet Metal

1523 US Highway 2 N.

No reviews yet

77 years of experience

Looking to fulfill your heating and air-conditioning needs? Look no further than Kims Heating & AC-Hansen Sheet Metal. With almost a decade of experience, we can help solve any such dilemma and find the best method for you and your home. Our team is formed from the best in the business and has a record for offering the most dependable and timely service. In addition, we offer sheet metal fabrication services and other metal shop services. Call today for the area's best!

Timberline Heating & Cooling

3015 Shale Rock Dr

No reviews yet

Timberline Heating & Cooling

3015 Shale Rock Dr

No reviews yet

With over 50 years of family ownership and experience serving both residential and commercial businesses in Billings and surrounding areas. Matt has followed his grandfather for 25 years and has recently taken ownership to follow in the footsteps of providing outstanding service with the same integrity as his grandfather. Offering 24 Hour Emergency Service Matt is there to help you. He is able to help you with sales of products for remodels, new construction or service for all brands. No job is too big or small and he can take care of that custom sheet metal work as well. Dare to compare and call Matt now.

LMN Construction LLC

1956 T St

No reviews yet

LMN Construction LLC

1956 T St

No reviews yet

13 years of experience

Your Eco Friendly Building Solution

Showing 1-10 of 38

Heating and Air Conditioning questions, answered by experts

When your HVAC system is loud, a few different causes are possible. If you have loose connections or bolts in the hardware, they can rattle as the system runs and vibrates. If you have an extremely dirty furnace filter, it could cause the system to generate noise. More commonly, an excessively loud HVAC system indicates a malfunction in the system. You may have a blower motor that is close to failing or a compressor that is breaking down. These issues require an immediate inspection.

An AC drip pan may stop draining if there’s a clog where the drip pan connects to the drain line. Clogs can form from a lack of cleaning or from rust or corrosion buildup. Cleaning the drip pan at least once per month lowers the chances of debris clogging the drain line.

Dirty filters are almost always the cause of poor airflow, so they should be regularly cleaned and then replaced as needed. The fan blades can also get dirty, so they should be cleaned when the unit is turned off. Make sure that the outdoor area around the back of the unit is unobstructed. Trees, shrubs, trash, and other objects could be too close to your unit.

Condensation forms when warmer, outside air combines with cooler air in your ductwork. This can happen when there are leaks in your air ducts, your HVAC system has a dirty air filter, or there’s a lack of insulation around the ducts. To prevent it from happening, replace your HVAC filters as directed. Also, once every five years, hire a local air duct cleaner to clean and inspect them.

There are a few things you can do to make your AC repair technician’s job easier and your home more comfortable while you wait for AC repair:

Cut back trees, shrubs, and weeds around the outdoor compressor
Clear a pathway inside and outside to your AC components
Set up a ladder for attic access if necessary
Pull your window AC out of the window and place in an easily accessible spot
Supplement with fans and open windows to help keep your house comfortable

The Hays, MT homeowners’ guide to heating and air conditioning services

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

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