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TRUSTED BY WILLIAMS BAY, WI HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon27
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Williams Bay

Avatar for Master Services, Inc.

Master Services, Inc.

4.39(
44
)
Approved Pro

Master Services, Inc.

4.39(
44
)
Approved Pro
Customers say: Super punctual
86 local quotes requested
35 years of experience

Master Services is a world-class provider of residential home services such as: Plumbing, Heating, Air Conditioning, Indoor Air Quality and Drain Cleaning. These Products and services are for improving comfort, reliability, peace of mind, plus cleaner, fresher, and healthier homes. In addition to scheduled service checks, repairing of existing equipment, and installation of new equipment, we can help you find ways to reduce your energy bills through a thorough cost-benefits analysis. We have an extensive history of repair service on all brands of plumbing, central air conditioning and heating systems. Master Services, Inc provides quality workmanship with professional, dependable, and courteous service with our "Fixed Right or It's FREE!"™ We offer 24-hour emergency service so that you can count on us to be there when you need us the most. Our certified technicians use state-of-the-art technology to diagnose and repair existing systems and always use the finest new equipment for installations in the industry. Furthermore, we have a patented Straight Forward Pricing Guide™ so you know what the price is before we do the work and you are never charged by the hour. How many companies are willing to show you their price books? You can count on Master Services to do the job right. We service all brands of plumbing, heating and air conditioning equipment.

"Master Services installed a new gas furnace for us 3 years ago. We have had them come each year since to check our furnace . Each technician has been very knowledgeable. Recently our thermostat failed and they were quick to schedule us in and replace. Very happy with their response."

Diane B on November 2025

Master Services is a world-class provider of residential home services such as: Plumbing, Heating, Air Conditioning, Indoor Air Quality and Drain Cleaning. These Products and services are for improving comfort, reliability, peace of mind, plus cleaner, fresher, and healthier homes. In addition to scheduled service checks, repairing of existing equipment, and installation of new equipment, we can help you find ways to reduce your energy bills through a thorough cost-benefits analysis. We have an extensive history of repair service on all brands of plumbing, central air conditioning and heating systems. Master Services, Inc provides quality workmanship with professional, dependable, and courteous service with our "Fixed Right or It's FREE!"™ We offer 24-hour emergency service so that you can count on us to be there when you need us the most. Our certified technicians use state-of-the-art technology to diagnose and repair existing systems and always use the finest new equipment for installations in the industry. Furthermore, we have a patented Straight Forward Pricing Guide™ so you know what the price is before we do the work and you are never charged by the hour. How many companies are willing to show you their price books? You can count on Master Services to do the job right. We service all brands of plumbing, heating and air conditioning equipment.

"Master Services installed a new gas furnace for us 3 years ago. We have had them come each year since to check our furnace . Each technician has been very knowledgeable. Recently our thermostat failed and they were quick to schedule us in and replace. Very happy with their response."

Diane B on November 2025


Avatar for John B Ventures LLC

John B Ventures LLC

4.88(
210
)
Approved Pro

John B Ventures LLC

4.88(
210
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
24 local quotes requested

Project maintenance and installation - John B Ventures LLC is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have years of hands-on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"John was very nice and patient with our questions. He was very knowledgeable and did a great job. "

Jose S on November 2025

Project maintenance and installation - John B Ventures LLC is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have years of hands-on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"John was very nice and patient with our questions. He was very knowledgeable and did a great job. "

Jose S on November 2025


Avatar for ThermaTek Heating and Air

ThermaTek Heating and Air

4.73(
324
)
Approved Pro

ThermaTek Heating and Air

4.73(
324
)
Approved Pro
Super Service Award
Customers say: Quick response
95 local quotes requested
7 years of experience

Welcome to ThermaTek Heating and Air. We are excited to exceed your expectations! As industry professionals, we will handle all your needs with the high-quality expertise and attention to detail your home or business deserves. We offer competitive prices and customer satisfaction is our number one priority. Call us today for your free estimate!

"Within an hour Therma Tek responded and had our unit fix! Fast, reliable and friendly. Highly recommend! Jeremy and Darren are awesome!"

Michael P on December 2025

Welcome to ThermaTek Heating and Air. We are excited to exceed your expectations! As industry professionals, we will handle all your needs with the high-quality expertise and attention to detail your home or business deserves. We offer competitive prices and customer satisfaction is our number one priority. Call us today for your free estimate!

"Within an hour Therma Tek responded and had our unit fix! Fast, reliable and friendly. Highly recommend! Jeremy and Darren are awesome!"

Michael P on December 2025


Avatar for Master Services, Inc.

Master Services, Inc.

4.60(
237
)
Approved Pro

Master Services, Inc.

4.60(
237
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
226 local quotes requested

Master Services Inc. has been in business since 1990 serving Walworth, Jefferson, Kenosha, Racine, Waukesha counties with ELITE Plumbing, Heating, Air Conditioning and Indoor Air Quality service. We pride ourselves with our 100% money back guarantee. We are only 1 in 4 companies in Wisconsin that are certified to wear the Technician Seal of Safety patch. This means you can trust that each one of our technicians are drug tested, background checked and professionally trained. We have one of our office staff answering the phone 24 hours a day 7 days a week." We Think You're Kind of a Big Deal"

"Great job! Started with the front office, I was taken care of from start to finish. They did some troubleshooting and explained every step. It turned out to be a fairly easy fix on something that was bothersome. Very happy. "

Susan B on August 2025

Master Services Inc. has been in business since 1990 serving Walworth, Jefferson, Kenosha, Racine, Waukesha counties with ELITE Plumbing, Heating, Air Conditioning and Indoor Air Quality service. We pride ourselves with our 100% money back guarantee. We are only 1 in 4 companies in Wisconsin that are certified to wear the Technician Seal of Safety patch. This means you can trust that each one of our technicians are drug tested, background checked and professionally trained. We have one of our office staff answering the phone 24 hours a day 7 days a week." We Think You're Kind of a Big Deal"

"Great job! Started with the front office, I was taken care of from start to finish. They did some troubleshooting and explained every step. It turned out to be a fairly easy fix on something that was bothersome. Very happy. "

Susan B on August 2025


Avatar for KETTLE MORAINE HEATING & AIR CONDITIONING LLC

KETTLE MORAINE HEATING & AIR CONDITIONING LLC

4.88(
119
)
Approved Pro

KETTLE MORAINE HEATING & AIR CONDITIONING LLC

4.88(
119
)
Approved Pro
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
339 local quotes requested

Kettle Moraine Heating & Air Conditioning, LLC is a third-generation family-owned business that has been serving Southeastern Wisconsin for over 35 years. Our mission is to provide our customers with peace of mind and 5-star service. We specialize in air conditioning, furnaces, boilers, ductless mini-splits, solar, backup generators, radon mitigation, plumbing and electrical services. Additionally, we are the region’s premier installer of Lennox energy-efficient heating and cooling systems and Mitsubishi ductless mini-split systems. With an unwavering commitment to our customers, you can count on us to deliver the personalized care you deserve. • 24/7 Emergency Service • Tune-Ups/Maintenance Plans • 0% Financing

"This company is amazing! I would recommend them 10times over. The job was gone quickly and with such precision. They care about their customers and will go to lengths that most companies, nowadays, have forgotten. The owner himself is not afraid to work hard and do what needs to be done. Sherry was beyond helpful and supportive throughout the process. If you want the job done right, this is your company."

Nichole S on November 2022

Kettle Moraine Heating & Air Conditioning, LLC is a third-generation family-owned business that has been serving Southeastern Wisconsin for over 35 years. Our mission is to provide our customers with peace of mind and 5-star service. We specialize in air conditioning, furnaces, boilers, ductless mini-splits, solar, backup generators, radon mitigation, plumbing and electrical services. Additionally, we are the region’s premier installer of Lennox energy-efficient heating and cooling systems and Mitsubishi ductless mini-split systems. With an unwavering commitment to our customers, you can count on us to deliver the personalized care you deserve. • 24/7 Emergency Service • Tune-Ups/Maintenance Plans • 0% Financing

"This company is amazing! I would recommend them 10times over. The job was gone quickly and with such precision. They care about their customers and will go to lengths that most companies, nowadays, have forgotten. The owner himself is not afraid to work hard and do what needs to be done. Sherry was beyond helpful and supportive throughout the process. If you want the job done right, this is your company."

Nichole S on November 2022


Avatar for S.R.M Contracting

S.R.M Contracting

4.30(
20
)
Approved Pro

S.R.M Contracting

4.30(
20
)
Approved Pro
Customers say: Quick response
917 local quotes requested
Free onsite estimate

S.R.M CONTRACTING has been in business for the last 3 years. Any job I take on. I work at it as if I was working on my own stuff. I am honest and to the point. I will not waste your money or my time. We have the experience and dedication to get the job done right! 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! Call or click for your FREE estimate today!

"Excellent quality. Highly responsive and accommodating to our requests. The final cost matched the original quote."

Matt A on October 2024

S.R.M CONTRACTING has been in business for the last 3 years. Any job I take on. I work at it as if I was working on my own stuff. I am honest and to the point. I will not waste your money or my time. We have the experience and dedication to get the job done right! 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! Call or click for your FREE estimate today!

"Excellent quality. Highly responsive and accommodating to our requests. The final cost matched the original quote."

Matt A on October 2024


Avatar for Sentri Homes

Sentri Homes

No reviews yet

Sentri Homes

No reviews yet
301 local quotes requested

Sentri Homes is a full-service contractor delivering high-end home additions, whole-home remodels, new custom builds, luxury kitchens, structural framing, roof replacements, and every major renovation. We assign a dedicated project manager to every job, deliver meticulous craftsmanship with clear communication, and back our work with an industry-leading warranty to ensure complete peace of mind on your largest investments. Our in-house team of licensed builders and master craftsmen consistently earns 5-star reviews by turning big visions into stunning, high-value homes—when you need one trusted partner who truly does it all, we’re the proven choice.

Sentri Homes is a full-service contractor delivering high-end home additions, whole-home remodels, new custom builds, luxury kitchens, structural framing, roof replacements, and every major renovation. We assign a dedicated project manager to every job, deliver meticulous craftsmanship with clear communication, and back our work with an industry-leading warranty to ensure complete peace of mind on your largest investments. Our in-house team of licensed builders and master craftsmen consistently earns 5-star reviews by turning big visions into stunning, high-value homes—when you need one trusted partner who truly does it all, we’re the proven choice.


Heating and ac maintenance, repairs, will fix older systems, and be honest and upfront about repairs and pricing. I do heating and ac for my primary job.


No slag given

No reviews yet

No slag given

No reviews yet

Hello im rick im a welder at heart and do it every day i do have a small welder for small jobs of all kinds .but i guess u can say im like a jack of all trades but master of none but im pretty good at most of the things i do from painting inside and outsides of houses to landscaping lil bricck work .just ask and if i feel comfortable doing what you need ill be sure happy to get it done for you..

Hello im rick im a welder at heart and do it every day i do have a small welder for small jobs of all kinds .but i guess u can say im like a jack of all trades but master of none but im pretty good at most of the things i do from painting inside and outsides of houses to landscaping lil bricck work .just ask and if i feel comfortable doing what you need ill be sure happy to get it done for you..


Avatar for Honey Badger Heat

Honey Badger Heat

No reviews yet

Honey Badger Heat

No reviews yet
2 years of experience

Honey Badger Heat is a family owned and operated business. We are here to provide the best quality at the most affordable prices. We work on furnaces, air conditioners, humidifiers, fireplaces, dryer vents, and duct work. Also anything in between. We offer 24 hour service. No extra fees for after hours and weekends on maintenance calls. We have over 5+ years of experience in the HVAC and fireplace industry. Installs and service we do it all. New house? No problem we would love to help you. Have a certain brand you like? We can get all brands. Also our team can provide you the best possible unit for your home. Builders are welcome!

Honey Badger Heat is a family owned and operated business. We are here to provide the best quality at the most affordable prices. We work on furnaces, air conditioners, humidifiers, fireplaces, dryer vents, and duct work. Also anything in between. We offer 24 hour service. No extra fees for after hours and weekends on maintenance calls. We have over 5+ years of experience in the HVAC and fireplace industry. Installs and service we do it all. New house? No problem we would love to help you. Have a certain brand you like? We can get all brands. Also our team can provide you the best possible unit for your home. Builders are welcome!

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Heating and Air Conditioning questions, answered by experts

You can buy a house with a 15-year-old HVAC system if you inspect the system for performance and budget for a replacement within the next three years. You can also negotiate the price with the sellers. Ask to look at the unit’s maintenance records and energy bills for the last two years to determine the shape of the HVAC system and its operating costs. Spend time in each room of the house to gauge if the HVAC keeps the home at a consistent temperature throughout.

Signs of a damaged evaporator coil include warm air from vents, frequent starts and stops without proper cooling, failure to turn on, refrigerant leaks, and unusual noises. If you suspect issues with your AC system or its components, it’s best to call an AC repair technician for proper diagnosis and repairs.

To extend your HVAC system’s lifespan, it’s crucial to keep up with maintenance. This includes changing filters and thermostat batteries, keeping the outside unit clean and clear of clutter, and lubricating moving parts. Watch out for leaks, mold buildup, and blockages to ensure your unit stays in good working order. Spotting these issues early can be the difference between a simple, wallet-friendly repair and an expensive replacement.

Yes, you can clean your air conditioner filter as a temporary fix for cleaning up dirt, but you’ll eventually need to replace it once the dust starts to accumulate. Use a vacuum with a hose attachment to clean your air filter at least once per year or more often if you have pets.

Yes. Your air supply should be balanced. The return and supply ducts need to maintain that balance, and this only occurs because an equal amount of air should be entering and leaving your HVAC system. Changes in pressure, extreme weather, and blocking vents with furniture or your stuff can make the air supply unbalanced and cause your home to get too cold or hot.

The Williams Bay, WI 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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