Best HVAC Companies in Lockport, IL (2026)

Last checked November 8, 2026 · 5 companies compared · How these were ranked

Comfort Zone Service is a good HVAC company to consider in Lockport. The comparison also includes London Heating & Cooling, DL Comfort Control, Windy City HVAC Repair and Bentley Heating & Cooling, in score order; the entries explain equipment, coverage and availability rather than claiming a workmanship test.

Disclosure: businesses marked "Client of Rogue Business Marketing" buy marketing services from Home Pros Insider's owner. Client status is not a scoring input; every company is scored on the same criteria. Read the disclosure.

#1 Comfort Zone Service

9910 W 190th St Ste K, Mokena, IL 60448 · (708) 403-3434 · Website · Best for: Furnace and boiler work with a published 24-hour emergency option

On Google Maps, their profile shows 5.0 from 391 reviews and the Mokena office at 9910 W 190th St, Suite K. The phone is (708) 403-3434. (google.com, checked November 8, 2026)
They state a 1988 start and NATE-certified staff on their Lockport service page. That page covers furnace and boiler repair, installation and maintenance; the credential statement is self-published. (comfortzoneservice.com, checked November 8, 2026)
Their contact page separates weekday office hours, 8:00 AM to 4:30 PM, from 24/7 emergency services. That distinction is useful when arranging a visit outside the office schedule. (comfortzoneservice.com, checked November 8, 2026)
Their homepage publishes a 100% satisfaction guarantee and says they service all major HVAC brands. It does not specify a separate parts-and-labor term in that statement. (comfortzoneservice.com, checked November 8, 2026)

#2 London Heating & Cooling

1008 Runyan Dr, Lockport, IL 60441 · (630) 486-5705 · Website · Best for: A Lockport-based replacement or water-heater estimate

The Google Maps result shows 4.9 from 242 reviews at 1008 Runyan Dr, with phone (630) 486-5705. The business website and BBB profile use the same phone. (google.com, checked November 8, 2026)
Their BBB profile dates the business to 2018 and identifies residential and commercial heating and air-conditioning work. It also lists furnace and heat-pump installation, maintenance and repair. (bbb.org, checked November 8, 2026)
Their website displays American Standard authorized-dealer branding and lists heating, cooling and water-heater services. The affiliation is stated on the business website rather than independently confirmed here. (londonheatingcooling.com, checked November 8, 2026)
Their BBB profile publishes Monday-Friday hours of 6:30 AM to 7:00 PM and Saturday hours of 8:00 AM to 5:00 PM, with Sunday closed. These are published hours, not an emergency-dispatch promise. (bbb.org, checked November 8, 2026)

#3 DL Comfort Control

110 E 10th St, Lockport, IL 60441 · (815) 600-6237 · Website · Best for: Comparing stated installation coverage before accepting a quote

At the time checked, their Google profile shows 4.8 from 59 reviews at 110 E 10th St. The Google phone is (708) 307-1860. (google.com, checked November 8, 2026)
Their homepage backs new installations with a 3-year labor warranty and a 10-year manufacturer warranty. The installation quote still needs to identify the equipment and written coverage conditions. (dlcomfortcontrol.com, checked November 8, 2026)
They advertise 24/7 service and installation, repair and maintenance of heating and cooling systems. Their site also says they work on all major equipment brands. (dlcomfortcontrol.com, checked November 8, 2026)
DL Comfort Control publishes (815) 600-6237 on its website, different from the Google phone above. The street address agrees, but the phone difference remains unresolved; the contact shown here comes from the website. (dlcomfortcontrol.com, checked November 8, 2026)

#4 Windy City HVAC RepairClient of Rogue Business Marketing

400 N Schmidt Rd Ste 211, Bolingbrook, IL 60440 · (312) 500-4822 · Website · Best for: Lockport furnace repair and Rheem or Durastar ductless options

Windy City HVAC Repair has 5.0 from 154 reviews on Google Maps, with the Bolingbrook office at 400 N Schmidt Rd, Suite 211, and phone (312) 500-4822. (google.com, checked November 8, 2026)
In Lockport, Windy City HVAC Repair repairs and replaces furnaces, air conditioners and heat pumps, and lists Rheem and Durastar ductless mini-split installations. (hvacchicago.com, checked November 8, 2026)
For heating calls, Windy City HVAC Repair offers same-day repair; after-hours AC appointments depend on availability. Callers are asked to confirm the available arrival window. (hvacchicago.com, checked November 8, 2026)
On its homepage, Windy City HVAC Repair states that it is licensed, bonded and insured. That is a business-published statement, not a license-register check performed for this comparison. (hvacchicago.com, checked November 8, 2026)

#5 Bentley Heating & Cooling

1004 E 8th St, Lockport, IL 60441 · (815) 838-2514 · Website · Best for: Local Amana system and boiler inquiries

Google Maps displays 4.8 from 32 reviews at 1004 E 8th St, with phone (815) 838-2514. Those contact details match their own homepage. (google.com, checked November 8, 2026)
On their homepage, the business lists furnaces, air conditioners, boilers and ductless systems, plus maintenance and repair of all brands. It publishes weekday hours of 8:00 AM to 5:00 PM. (bentleyheatingandcooling.com, checked November 8, 2026)
Their qualifications page identifies Amana dealer status and NATE-certified staff. These are business-published claims; an issuer record was not confirmed for this comparison. (bentleyheatingandcooling.com, checked November 8, 2026)
They offer extended warranties for new or existing equipment. Their extended-warranty page describes the purpose of coverage but does not specify a parts or labor term, so the quote needs the actual duration and scope. (bentleyheatingandcooling.com, checked November 8, 2026)

Questions about HVAC in Lockport

Who is a good HVAC company in Lockport?

Comfort Zone Service leads this published-evidence comparison, followed by London Heating & Cooling and DL Comfort Control. The comparison measures public evidence rather than completed-job quality; the service needed and the written estimate still matter.

What should an installation quote say about coverage?

Separate the parts and labor terms, including the duration, equipment covered and conditions. A manufacturer term and an installer term describe different protection; a general satisfaction promise is not a stated parts-and-labor period.

Does an open office schedule establish emergency availability?

No. Office hours and emergency arrangements are different. A round-the-clock service statement does not establish the arrival time or after-hours fee for a particular appointment.

Why is the phone different for the third entry?

Its website and Google Maps profile show different numbers at the same street address. The cause was not established. The comparison shows the website phone and assigns no contact-evidence points for the unresolved difference.

How these companies were chosen and ranked

Home Pros Insider compared five businesses offering HVAC service in Lockport, using their own service pages, actual Google Maps profiles and independent directories or manufacturer records checked November 8, 2026. Local offices and firms that explicitly serve the city were eligible. The 30-point total measures published evidence, not workmanship, price or the outcome of a service visit. No phone calls or on-site tests were performed.

Each of six categories earns 0-5 points. Contact earns 5 when address and phone agree across the website, actual Google profile and an independent directory; 3 for agreement across two sources; 1 for the website alone; 0 for missing or unresolved conflicting details. Google feedback uses the paired score and count: 4.7/100 earns 5; 4.5/50 earns 4; 4.0/25 earns 3; 4.0/10 earns 2; another measured pair earns 1. Both thresholds must be met. The Google figures were read directly from actual Maps profiles on the date checked, not copied from website counters.

A documented start year through 1999 earns 5; 2000-2009 earns 4; 2010-2019 earns 3; 2020-2024 earns 2; 2025 onward earns 1. Vague experience claims are not converted into founding years. Written protection earns 5 for explicit parts and labor duration and scope, 3 for one concrete duration and scope or a specific money-back remedy, 1 for a general written promise. Conditional maximum terms count as options only, not automatic coverage. Emergency availability earns 5 for explicit 24-hour service, 3 for after-hours or weekend emergency service without that promise, 1 for normal hours only. Qualifications earn 5 for a confirming issuer record, 3 for a named self-published qualification, 1 for a generic license or insurance statement.

Missing evidence earns 0 and means unmeasured, not that a service or qualification is absent. Tied totals are resolved by contact, Google feedback, written protection, availability, start-year and qualification points, then alphabetically. Client status is not a scoring input. Different published phone numbers remain unresolved unless a source establishes their relationship; zero contact points do not mean a number is disconnected.

Six-category breakdown, in the order described above:
Entry 1: 3 / 5 / 5 / 1 / 5 / 3 = 22/30.
Entry 2: 3 / 5 / 3 / 0 / 1 / 3 = 15/30.
Entry 3: 0 / 4 / 0 / 5 / 5 / 0 = 14/30.
Entry 4: 3 / 5 / 0 / 0 / 3 / 1 = 12/30.
Entry 5: 3 / 3 / 0 / 0 / 1 / 3 = 10/30.

Every company was scored on the same criteria (listed here); the order follows the scores. Full rules: methodology.

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