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5 Best Furnace Repair Services Thornton, IL

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Written By Callie Marsalisi|Last Updated: February 05, 2024

It's important to have access to reliable furnace repair services to keep your home comfortable. In this guide, we'll go over common furnace problems and show you where to turn for help with both heating emergencies and regular maintenance. The top heating, ventilation, and air conditioning (HVAC) servicers in Thornton, Illinois, can help keep your heating and cooling running smoothly. If you learn from this article that you need a full system replacement, check out our picks for the best furnace brands.

5 Best Furnace Repair Companies in Thornton

Merts Heating & Air Conditioning Logo

Merts Heating & Air Conditioning

Based on 1,209 customer reviews.

Services Offered

Boiler InstallationFurnace InstallationDuct CleaningAc RepairFurnace RepairRadiant HeatingDuctlessFiltrationIndoor Air QualityMaintenanceAc Installation


  • Clear pricing policy
  • Informative resources
  • Reliable customer support
3102 Louis Sherman Dr, Steger, IL 833-526-3787 mertsheating.com


Based on 279 customer reviews.

Services Offered

Ac InstallationVentilationDuctlessBoiler InstallationDuct CleaningFurnace InstallationMaintenanceFurnace RepairEmergency ServicesIndoor Air Quality


  • Informative resources
  • Prompt service delivery
  • Reliable customer support
4811 W 129th St, Alsip, IL 708-497-5464 windycitymechanical.com
Amber Heating & Air Conditioning Logo

Amber Heating & Air Conditioning

Based on 273 customer reviews.

Services Offered

FiltrationAc InstallationDuctlessMaintenanceFurnace RepairEmergency ServicesFurnace InstallationInspectionIndoor Air QualityAc RepairSmart Home IntegrationDuct CleaningBoiler Installation


  • Reliable customer support
  • Free quote
  • Clear pricing policy
11950 S Central Ave, Alsip, IL 708-290-1742 amberheatingandair.com
South Suburban Heating & Air Conditioning, Inc. Logo

South Suburban Heating & Air Conditioning

Based on 208 customer reviews.

Services Offered

Furnace RepairMaintenanceDuctlessAc InstallationAc RepairFurnace Installation


  • Clear pricing policy
  • Reliable customer support
2914 Bernice Ave, Lansing, IL 708-474-3455 southsuburbanheating.com

More Local Hvac Companies

Quality Service Inc.

User Reviews: 4.5/5 

30 E 34th St
Steger, IL 60475

Any Season Heating & Air Conditioning

User Reviews: 4.5/5 

7239 Duvan Dr
Tinley Park, IL 60477

Around the Town Heating and Cooling

User Reviews: 4.6/5 

1025 W 79th St
Chicago, IL 60620

Porterhouse Heating & Cooling

User Reviews: 4.5/5 

18521 Spring Creek Dr
Tinley Park, IL 60477

Air Source 1 Heating & Air Conditioning

User Reviews: 5/5 

8508 W 192nd St
Mokena, IL 60448

Lansing Heating & Air Conditioning

User Reviews: 4.5/5 

8016 US-41
St John, IN 46373

Hollaway-Meyer's Heating & Air

User Reviews: 3.8/5 

950 E 165th St
Hammond, IN 46324

Climate Master Mechanical Contractors, Inc.

User Reviews: 4.6/5 

19133 85th Ct
Mokena, IL 60448

Comfortmate Bremen Service

User Reviews: 4.5/5 

19137 S Blackhawk Pkwy
Mokena, IL 60448

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

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Facts about Thornton
Average Min Temp Percentile:39.1%
January Average Min Temp:15.7°F
Climate Zone:Cold
Average Energy Cost:$0.13/kWh
Median Year Houses Built:1962
Average Annual Snowfall:30.6"

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Services Offered by Furnace Repair Companies

Furnace repair providers offer a number of services to keep your furnace working efficiently and effectively. We review common services below.

Repair and Maintenance

Timely repairs restore your furnace's function, extend its life span, and optimize energy efficiency. Furnace repair companies can diagnose and repair most common furnace issues. These include clogged air filters, malfunctioning thermostats, or broken blower motors. Qualified HVAC technicians can also handle problems such as possible gas leaks, damaged heat exchangers, faulty ignitions, and malfunctioning thermostats. Furnace experts can also complete routine HVAC maintenance to avoid unnecessary breakdowns. Regular maintenance involves inspecting and cleaning your furnace, lubricating moving parts, replacing air filters, and ensuring all components function properly.


Your local HVAC expert can upgrade your furnace to a more energy-efficient model, such as a heat pump. If your system is beyond repair, they can also help install a new furnace. Your technician will start by assessing your home's layout and heating needs. Then, the tech will recommend the right furnace model for your budget and home requirements. HVAC technicians follow safety protocols and standards set by the industry to ensure safe furnace replacement and connection. They also integrate the new system with existing air ducts and thermostats. Following installation, the company completes one last inspection to ensure the furnace runs optimally.


If your furnace isn’t turning on, schedule a thorough inspection through a furnace repair provider. A technician will examine each of the furnace's components to identify possible causes. The inspection typically includes examining the heat exchanger for cracks or damage, cleaning and replacing air filters, checking for any gas or fuel leaks, inspecting the burner and ignition system, and testing the thermostat's accuracy. We recommend an annual inspection, during which your technician will check your heating system's efficiency and safety while making any necessary repairs or adjustments. Regular inspections help avoid potential breakdowns, ensure optimal heating performance, and promote safe living during chilly winters.

Emergency Services

Emergency furnace repair services help with unexpected breakdowns, malfunctions, or safety concerns. Many companies offer these around-the-clock services to get your system back up and running promptly any time of the day or night. Furnace failure can cause serious discomfort and health risks from the reduced indoor air quality, especially if the breakdown happens during extreme weather and you can't open windows for fresh air. Emergency services might cost more than scheduled services, but protecting your health is worth it.

Factors To Consider When Choosing a Local Thornton Furnace Repair Service

There are several important considerations for hiring a local Thornton furnace repair service. We go over some of the most important below.

  • Cost: Compare multiple Thornton furnace repair providers to look for the best service offerings and prices. Look for transparent and competitive pricing, but be wary of companies that offer extremely low rates. These providers often make up the difference with low-quality workmanship or subpar replacement parts.
  • Guarantees: Ask your furnace repair company about any warranties or guarantees it offers. Trustworthy service providers offer these guarantees to protect customers in case of any issues post-repair. Guarantees may cover both parts and workmanship.
  • Licensing: Verify that your furnace repair servicer holds the required local and state licenses and certifications. Proper licensing ensures the technicians are qualified and trained to handle furnace repairs safely. In Illinois, your HVAC contractor must obtain certification from your local city or municipal government.
  • Qualifications: You can inquire about a company's training policies as well as its technicians' experience. Companies that provide ongoing training tend to have technicians that are up to date on the latest repair techniques. You want a company that employs well-trained technicians who are experienced in working with various furnace makes and models.
  • Reputation and reviews: Read online testimonials and reviews to get an idea of a company's reputation. Overall positive reviews are indicative of quality services. You can also verify a company's commitment to customer satisfaction by seeing how it addresses complaints and other negative feedback.

How Much Does a Furnace Repair Cost?

The total cost of furnace repair will vary depending on factors including the type of HVAC unit you have, the extent of the damage, and the cost of replacement parts. Your final price may vary, but on average expect to spend around $458 on furnace repair. Below, find a list of common repairs and their costs.

  • Broken thermostat: $83–$415
  • Cleaning: $50–$66
  • Cracked heat exchanger: $1,658–$2,902
  • Damaged blower bearings: $25–$124
  • Damaged blower belt: $25–$91
  • Filter change: $33–$124

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Frequently Asked Questions About Furnace Repair in Thornton

How often should I have my furnace serviced?

You should have your furnace serviced at least once annually to make sure it runs efficiently and safely. Additionally, one simple maintenance step any homeowner can take is to change the furnace filter every year.

Does a home warranty cover a furnace?

Home warranties usually cover furnaces, but the details of your plan will vary depending on the company. Check out our guide to best home warranties for furnace coverage to learn more.

How can I tell whether my furnace needs repairs?

Some signs that your furnace might need repairs include increased energy bills, strange noises, a yellow pilot light, and uneven heating. A professional furnace inspection can help determine whether it’s time for a full furnace replacement.

What should I do if my furnace breaks down in the middle of winter?

You might require emergency repair services if your furnace malfunctions in the middle of winter. Many HVAC repair companies offer around-the-clock emergency services to get your furnace up and running again.

How can I prevent the need for furnace repairs?

You can prevent the need for furnace repairs by keeping up with regular maintenance like cleaning and replacing air filters. Annual inspections and service by your local HVAC professional also helps catch furnace issues before they become a serious problem.

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