Top-rated heating and air conditioning pros.

Get matched with top heating and air conditioning pros in Merrimac, WI

There are 4 highly-rated local heating and air conditioning pros.

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  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon133
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Merrimac

Avatar for Cardinal Heating & Air Conditioning

Cardinal Heating & Air Conditioning

4.88(
140
)
Approved Pro

Cardinal Heating & Air Conditioning

4.88(
140
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
159 local quotes requested

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 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
190 local quotes requested

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


Avatar for Southport Home Services

Southport Home Services

5.00(
5
)
Approved Pro

Southport Home Services

5.00(
5
)
Approved Pro
117 local quotes requested
20 years of experience

At Southport Home Services, we're A+ rated by the BBB. Our technicians are NATE certified to meet national standards of excellence, and we're a Carrier® Factory Authorized Dealer, recently cited as the top medium-sized business to work for by the Milwaukee Journal Sentinel. We treat our team well and hold them to high professional standards. Our up front, transparent pricing, great customer service, and honesty in our business practices make us the plumbing and HVAC company that you'll feel good working with on a regular basis, with 100% satisfaction guaranteed.

At Southport Home Services, we're A+ rated by the BBB. Our technicians are NATE certified to meet national standards of excellence, and we're a Carrier® Factory Authorized Dealer, recently cited as the top medium-sized business to work for by the Milwaukee Journal Sentinel. We treat our team well and hold them to high professional standards. Our up front, transparent pricing, great customer service, and honesty in our business practices make us the plumbing and HVAC company that you'll feel good working with on a regular basis, with 100% satisfaction guaranteed.


Avatar for Hooper Corporation

Hooper Corporation

5.00(
4
)
Approved Pro

Hooper Corporation

5.00(
4
)
Approved Pro
47 local quotes requested
8 years of experience

When your pipes freeze or furnace quits, our work begins. Hooper’s service technicians arrive equipped with fully stocked service vans and are ready to roll at a moment’s notice. We’ve been caring for customers in the Madison area since 1913 and offer 24-hour residential and commercial service. You can rely on Hooper for all your plumbing, heating and cooling, and fire protection needs. When you need a trusted service partner, Hooper is here.

"We hired Hopper to replace a a 19 yo central AC system. They suggested a solution that saved was 14.3% less than ordering new system from the manufacter. And more importantly they had it installed 2 days later. Hooper is a well establised company that has earned its good reputation."

Fred C on June 2025

When your pipes freeze or furnace quits, our work begins. Hooper’s service technicians arrive equipped with fully stocked service vans and are ready to roll at a moment’s notice. We’ve been caring for customers in the Madison area since 1913 and offer 24-hour residential and commercial service. You can rely on Hooper for all your plumbing, heating and cooling, and fire protection needs. When you need a trusted service partner, Hooper is here.

"We hired Hopper to replace a a 19 yo central AC system. They suggested a solution that saved was 14.3% less than ordering new system from the manufacter. And more importantly they had it installed 2 days later. Hooper is a well establised company that has earned its good reputation."

Fred C on June 2025


Avatar for RUAH HEATING AND COOLING LLC

RUAH HEATING AND COOLING LLC

5.00(
3
)
Approved Pro

RUAH HEATING AND COOLING LLC

5.00(
3
)
Approved Pro
45 local quotes requested
5 years of experience

Faith-based, family owned residential HVAC Contractor. Specializing in residential sales and service of forced air, ductless and hydronic systems. Dedicated to serving the community through honesty and affordable pricing. Come and see. Call ir email us today, we would love to hear from you. 715-396-1381 or [email protected]

"He was very prompt, as well as conscientious and trustworthy."

Debra L on October 2025

Faith-based, family owned residential HVAC Contractor. Specializing in residential sales and service of forced air, ductless and hydronic systems. Dedicated to serving the community through honesty and affordable pricing. Come and see. Call ir email us today, we would love to hear from you. 715-396-1381 or [email protected]

"He was very prompt, as well as conscientious and trustworthy."

Debra L on October 2025


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
188 local quotes requested

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



Fire & Ice HVAC Services llc

No reviews yet

Fire & Ice HVAC Services llc

No reviews yet

Complere residential and commercial Heating and Cooling Service and Installation. Dependable and courteous personnel. Servicing all brands. 24 hour emergency service. 30 years experience. NATE certified technicians. Licensed and insured.

Complere residential and commercial Heating and Cooling Service and Installation. Dependable and courteous personnel. Servicing all brands. 24 hour emergency service. 30 years experience. NATE certified technicians. Licensed and insured.


Percolation Consulting, LLC

No reviews yet

Percolation Consulting, LLC

No reviews yet

Integrated solar energy solutions: photovoltaic, solar-thermal, battery storage and heat pumps. We are not tied to any specific PV manufacturer and will source the best solution for your location and situation. Solar energy is no longer idealists' domain - it makes solid financial sense. Whether your goal is to minimize the time until your solar installation is paid off, or you want to ride out the Zombie apocalypse in comfortable energy self-sufficiency, we have the perfect solution for your location and building use. Contrary to popular perception, year-round self-sufficiency can be reasonably achieved in the Midwest. We have close relationships to vendors of weekly and seasonal energy storage systems which will keep lights and heat on year-round.

Integrated solar energy solutions: photovoltaic, solar-thermal, battery storage and heat pumps. We are not tied to any specific PV manufacturer and will source the best solution for your location and situation. Solar energy is no longer idealists' domain - it makes solid financial sense. Whether your goal is to minimize the time until your solar installation is paid off, or you want to ride out the Zombie apocalypse in comfortable energy self-sufficiency, we have the perfect solution for your location and building use. Contrary to popular perception, year-round self-sufficiency can be reasonably achieved in the Midwest. We have close relationships to vendors of weekly and seasonal energy storage systems which will keep lights and heat on year-round.


Mad City Small Engines

5.00(
8
)

Mad City Small Engines

5.00(
8
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Mad city small engines specializes in repairing and tuning up all items ranging from snow blowers and lawn mowers to pressure washers and chainsaws. Locally operated and owned with fast service and affordable rates we come to you to start your engines.

"Owen gave instructions through phone and came in few hours later to take a look at the furnace. He accurately diagnosed it, got a new part, installed it and fixed my furnace! Works like a charm again."

Maarit S on April 2022

Mad city small engines specializes in repairing and tuning up all items ranging from snow blowers and lawn mowers to pressure washers and chainsaws. Locally operated and owned with fast service and affordable rates we come to you to start your engines.

"Owen gave instructions through phone and came in few hours later to take a look at the furnace. He accurately diagnosed it, got a new part, installed it and fixed my furnace! Works like a charm again."

Maarit S on April 2022

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Heating and Air Conditioning questions, answered by experts

You should have your HVAC serviced at least once per year. A HVAC pro can perform maintenance twice a year if your unit is older or has many issues. You can expect to pay between $100 and $550 for HVAC maintenance, which includes a thorough tune-up, routine service, proactive and reactive maintenance, and emergency maintenance services.

You should know the main components of an air conditioner: the condenser coils, evaporator coils, drip pan, AC filter, ducts, and refrigerant. Each part plays a key role in the performance and safety of your AC system. When tracking the source of AC issues or odors, it helps to know where to look. Your outdoor unit houses your condenser coils, fan, and compressor. Your indoor unit houses your evaporator coils, drain lines, and filter, and it connects to your ductwork. 

When your AC contactor goes bad, you might hear chattering or buzzing noises coming from your air conditioner. You may also notice that your AC is running but isn’t cooling your home. In some cases, your air conditioner might not even turn on at all. There could also be physical damage, discoloration, or corrosion around the contactor.

You can buy R-22 refrigerant for your home air-conditioning system through your local AC repair specialist, who can also refill your R-22 system as needed. You may find that the cost of R-22 has gone up due to shortages as the EPA banned this refrigerant. Ask your pro to inspect your system for any leaks or issues.

If your AC suddenly stops working, the first thing to check is your thermostat settings. Ensure the thermostat is set to the appropriate temperature and mode (cooling). Sometimes, a simple adjustment or replacing the batteries in the thermostat can resolve the issue. If that’s not the issue, look to see if the circuit breaker tripped. These basic checks can often identify simple fixes before you need to call for professional assistance.

The Merrimac, 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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