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TRUSTED BY DEFOREST, WI HOMEOWNERS

  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon178
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Deforest

Avatar for Clark Heating & Cooling

Clark Heating & Cooling

4.90(
423
)
Approved Pro

Clark Heating & Cooling

4.90(
423
)
Approved Pro
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
45 years of experience

Clark Heating & Cooling offers American standard & Bryant heating & cooling products. We could offer many other brands but we feel these two offer the best balance of features, benefits, reliability, warranty coverage and overall value. As we say, the bitterness of poor quality remains long after the sweetness of a low price is forgotten. We are an American standard customer care dealer which means we go above & beyond to ensure a great experience with Clark heating. We have many times been recognized as "dealer of the year" for providing unmatched service. We've accomplished this by maintaining customer satisfaction rating of over 98%. Contact us today, we'd love to make you a satisfied customer too.

"Great to work with. They were efficient and knowledgeable. They took care of the rebate for our heat pump. Only thing lacking was responsiveness to email/phone communication after the install was done. Heat pump system is working great."

Chris M on February 2024

Clark Heating & Cooling offers American standard & Bryant heating & cooling products. We could offer many other brands but we feel these two offer the best balance of features, benefits, reliability, warranty coverage and overall value. As we say, the bitterness of poor quality remains long after the sweetness of a low price is forgotten. We are an American standard customer care dealer which means we go above & beyond to ensure a great experience with Clark heating. We have many times been recognized as "dealer of the year" for providing unmatched service. We've accomplished this by maintaining customer satisfaction rating of over 98%. Contact us today, we'd love to make you a satisfied customer too.

"Great to work with. They were efficient and knowledgeable. They took care of the rebate for our heat pump. Only thing lacking was responsiveness to email/phone communication after the install was done. Heat pump system is working great."

Chris M on February 2024


Avatar for Cardinal Heating & Air Conditioning

Cardinal Heating & Air Conditioning

4.90(
128
)
Approved Pro

Cardinal Heating & Air Conditioning

4.90(
128
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
41 years of experience

Since 1984, Cardinal Heating, Cooling, Plumbing & Electric has provided the Sun Prairie, WI and the surrounding area with exceptional Heating, Air Conditioning, Electrical and Plumbing services. We offer professional technicians, same-day installations and 24-hour emergency service. We believe we are the right choice for any of your HVAC, Plumbing, or Electrical needs. Call today to schedule your next appointment!

"Had an old fixture above kitchen sink go kaput (fluorescent starter disintegrated), so Cardinal came out and offered LED alternatives (two provided, brought on-hand from supply warehouse). Also fixed a switched outlet that had shorted out. Great work done, nice alternatives for the LED light, and switched outlet was wired to be always-on for one socket and switched for the other -- better than it was before at no additional cost. Later I called to ask the exact serial and model number of the LED light because the papers left did not state it. Not only did I get an email a couple hours later with the model/serial, the tech included the detailed documentation for the fixture so if anything goes wrong I can likely fix it myself next time. The tech who did the work also applied a 10% off discount card for me with no extra hassle, saving me close to $100 on the work."

Joe K on November 2025

Since 1984, Cardinal Heating, Cooling, Plumbing & Electric has provided the Sun Prairie, WI and the surrounding area with exceptional Heating, Air Conditioning, Electrical and Plumbing services. We offer professional technicians, same-day installations and 24-hour emergency service. We believe we are the right choice for any of your HVAC, Plumbing, or Electrical needs. Call today to schedule your next appointment!

"Had an old fixture above kitchen sink go kaput (fluorescent starter disintegrated), so Cardinal came out and offered LED alternatives (two provided, brought on-hand from supply warehouse). Also fixed a switched outlet that had shorted out. Great work done, nice alternatives for the LED light, and switched outlet was wired to be always-on for one socket and switched for the other -- better than it was before at no additional cost. Later I called to ask the exact serial and model number of the LED light because the papers left did not state it. Not only did I get an email a couple hours later with the model/serial, the tech included the detailed documentation for the fixture so if anything goes wrong I can likely fix it myself next time. The tech who did the work also applied a 10% off discount card for me with no extra hassle, saving me close to $100 on the work."

Joe K on November 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
38 years of experience

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 O.G. Property Services

O.G. Property Services

5.00(
35
)
Approved Pro

O.G. Property Services

5.00(
35
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
Warranties offered

Hi every body, this is Oscar and I know the quality of work I can do for you. I have maintenance experience from different companies. My work is about painting, some flooring, drywall repairs, appliances troubleshooting, gutters and roof cleaning, downspout, dryer vent cleaning and general cleaning services at home. Anything I can help let me know. I speak English, Spanish, and Italian if it’s needed.

"Top marks all the way around for Oscar. Oscar is the best handyman we’ve ever employed. He was everything you want in someone working on your home: excellent communication, reasonable cost, high quality work, prompt, dependable, friendly, neat, cleans up after each day of work, very detail-oriented, and just a really nice guy. He re-screened our 3-season porch, replaced all the exterior wood facings on the porch, hung a new and much improved door on same porch, replaced about 12 feet of cedar privacy fence, and power washed the full exterior of our house. There is no question that we will call Oscar again when we need work done. If you’re looking for a talented handyman, look no further; just call Oscar. "

Diana G on November 2025

Hi every body, this is Oscar and I know the quality of work I can do for you. I have maintenance experience from different companies. My work is about painting, some flooring, drywall repairs, appliances troubleshooting, gutters and roof cleaning, downspout, dryer vent cleaning and general cleaning services at home. Anything I can help let me know. I speak English, Spanish, and Italian if it’s needed.

"Top marks all the way around for Oscar. Oscar is the best handyman we’ve ever employed. He was everything you want in someone working on your home: excellent communication, reasonable cost, high quality work, prompt, dependable, friendly, neat, cleans up after each day of work, very detail-oriented, and just a really nice guy. He re-screened our 3-season porch, replaced all the exterior wood facings on the porch, hung a new and much improved door on same porch, replaced about 12 feet of cedar privacy fence, and power washed the full exterior of our house. There is no question that we will call Oscar again when we need work done. If you’re looking for a talented handyman, look no further; just call Oscar. "

Diana G on November 2025


"Prompt service, courteous technucians"

Sandra G on March 2023

JB Mechanical, LLC, is your premier choice for all of your HVAC needs in Beaver Dam, Wisconsin and surrounding areas. No project is too big or too small, so call today and let us put our experience to work for you!

"Prompt service, courteous technucians"

Sandra G on March 2023


"Good Service. Everything repaired same day. All done close to Christmas. I couldn’t ask for the repairs to done any better."

John S on December 2025

Looking to help home owners with all their remodeling needs

"Good Service. Everything repaired same day. All done close to Christmas. I couldn’t ask for the repairs to done any better."

John S on December 2025


"Responded right away and he responded right away, came out right away. We talked before he came out, so you know, I would be comfortable with his, you know, his demeanor and stuff. so it worked really well. "

Ann B on December 2025

In business since 1985 with over 35 years of experience. Family owned and operated. Home repairs, improvements and installations.

"Responded right away and he responded right away, came out right away. We talked before he came out, so you know, I would be comfortable with his, you know, his demeanor and stuff. so it worked really well. "

Ann B on December 2025


"Multiple exterior repairs including: enhance the structure of a 2nd story porch, repair wood rot in several locations, storm door replacement, fence and post replacement and painting. Adam treats your house as if it's his own - he discovered additional wood rot and mouse entry points on the siding and re-fastened framing on the front door so it now operates like new. My house is now mouse free for the first time since it was purchased 28 years ago. Adam comes up with great solutions that I've never considered. There's no need to check his work with a level - it's always right on. He always does things the right way and gives you options to suit your budget. I'm a probably a difficult customer since I'm a retired engineer and Adam meets or exceeds all expections."

Carl K on November 2025

Award winning. We take great pride in our experience, expertise, quality and customer service that we provide to meet our customers needs. It is our mission to provide a great experience from start to completion of a project.

"Multiple exterior repairs including: enhance the structure of a 2nd story porch, repair wood rot in several locations, storm door replacement, fence and post replacement and painting. Adam treats your house as if it's his own - he discovered additional wood rot and mouse entry points on the siding and re-fastened framing on the front door so it now operates like new. My house is now mouse free for the first time since it was purchased 28 years ago. Adam comes up with great solutions that I've never considered. There's no need to check his work with a level - it's always right on. He always does things the right way and gives you options to suit your budget. I'm a probably a difficult customer since I'm a retired engineer and Adam meets or exceeds all expections."

Carl K on November 2025


Avatar for Engelhart Electric, Inc.

Engelhart Electric, Inc.

4.77(
72
)
Approved Pro

Engelhart Electric, Inc.

4.77(
72
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
11 years of experience

Engelhart Electric, Inc. was founded in 2014 by two brothers, Justin and Chaise Engelhart. After many years of the brothers working together in the cellular, commercial, and residential electrical services arena, they decided to start their own company, and Engelhart Electric, Inc. was formed. The brothers have a combined 31 years of electrical experience. Chaise holds a Masters Electrical License, and Justin holds a State of Wisconsin electrician's license. The brothers are Madison natives and are well known in the greater Madison area for their ability to finish projects on time with high expertise and precision. They are prompt and courteous, with high attention to detail. CALL TODAY!

"He was very prompt. Came in a fixed our problem and helped us discover another issue that we will handle with a new light fixture. Very informative."

Cheryl W on November 2025

Engelhart Electric, Inc. was founded in 2014 by two brothers, Justin and Chaise Engelhart. After many years of the brothers working together in the cellular, commercial, and residential electrical services arena, they decided to start their own company, and Engelhart Electric, Inc. was formed. The brothers have a combined 31 years of electrical experience. Chaise holds a Masters Electrical License, and Justin holds a State of Wisconsin electrician's license. The brothers are Madison natives and are well known in the greater Madison area for their ability to finish projects on time with high expertise and precision. They are prompt and courteous, with high attention to detail. CALL TODAY!

"He was very prompt. Came in a fixed our problem and helped us discover another issue that we will handle with a new light fixture. Very informative."

Cheryl W on November 2025


Avatar for WireOne

WireOne

4.43(
195
)
Approved Pro

WireOne

4.43(
195
)
Approved Pro
Customers say: True professional
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
15 years of experience

WIREONE is working to become the leading electrical contractor in the region through a customer-centric approach that provides our clients with the absolute best electrical services available. Our journeyman electricians are some of the most positively reviewed electricians in the industry. They consistently receive five-star reviews on sites such as Facebook and Google. We begin each residential service call with a client conference during which we’ll sit down with you to discuss your project and any related electrical needs. After gaining a complete understanding of your goals, we’ll perform our complimentary 57-point “Keep it Safe Inspection” to ensure that the electrical system in your home is performing safely and in conformance with local building codes. Then, before any work begins, we’ll provide you with Our Best Price. Our Best Price will be the most cost-effective way to complete your project quickly and safely. We also include a 5 year warranty on all work performed!

"It took 1hr & 15min"

Christen C on October 2025

WIREONE is working to become the leading electrical contractor in the region through a customer-centric approach that provides our clients with the absolute best electrical services available. Our journeyman electricians are some of the most positively reviewed electricians in the industry. They consistently receive five-star reviews on sites such as Facebook and Google. We begin each residential service call with a client conference during which we’ll sit down with you to discuss your project and any related electrical needs. After gaining a complete understanding of your goals, we’ll perform our complimentary 57-point “Keep it Safe Inspection” to ensure that the electrical system in your home is performing safely and in conformance with local building codes. Then, before any work begins, we’ll provide you with Our Best Price. Our Best Price will be the most cost-effective way to complete your project quickly and safely. We also include a 5 year warranty on all work performed!

"It took 1hr & 15min"

Christen C on October 2025

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Heating and Air Conditioning questions, answered by experts

If the air coming from your AC unit is cool but never quite cold, there are a few reasons this might be happening. For starters, it could signal that your refrigerant levels are low. If there are no other indications of this particular issue, like hissing noises or frozen refrigerant lines, anything from dirty filters to damaged condenser or evaporator coils could be responsible for the problem.

Fixing a leak in an AC unit costs $200 to $1,600, depending on the type of leak and any related damage. But depending on the age and condition of your AC, it might make more sense to replace the AC unit instead of repairing it. If your AC is only a few years old and relatively problem-free, then repairing it is the right call. But if it’s nearing a decade old and has other issues, consider replacing it.

An AC compressor is one of the most expensive parts to replace on an AC unit if it breaks. You’ll pay up to $2,300 if you need a new one. If your AC is blowing warm air, there doesn’t seem to be a lot of air coming out of the ducts at all, or the unit cycles on and off a lot, you may have a broken compressor. Call a pro to check out your system. 

There are two main reasons your furnace and AC are turning on at the same time. The first could be that you’re confusing the furnace with the blower. The blower is located in the furnace and will turn on to distribute cool air from the air conditioner through the ductwork in the home. This is normal. If the actual furnace is turning on at the same time as the AC and hot and cool air are coming into the home, it could be a result of incorrect writing to a new thermostat or new systems.

Definitely. Both experts and homeowners can attest to the convenience and efficiency of HVAC zoning. Not only does it make every room the perfect temperature—no matter what the temperature is for you—but it also saves energy (and therefore money) in the process. It is a costly up-front investment, but many homeowners agree that it’s worthwhile in the long run, especially if you plan to stay in your home for a while.

The Deforest, 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.

What do you need done? We’ll find top pros.
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