Top AC Companies in
Janesville, WI (2026)

R&W Heating & Cooling is based in Milton and serves Janesville, with the company stating that it can reach Janesville homes within about 20 minutes. Its Janesville page lists AC installation, AC repair, furnace repair, furnace installation, preventive maintenance, and 24/7 emergency HVAC service.

R&W describes itself as family-owned and operated since 1960 and an official Lennox dealer. The company says it has installed and serviced more than 300 heating and cooling units in the Janesville area.

• When You Can Reach Them: 24/7 emergency HVAC service
• Who's Fixing Your AC: Lennox dealer technicians with experience across heating and cooling systems
• What It May Cost: Free estimates and preventive maintenance options
• Local Service Fit: Milton-based provider serving Janesville and nearby Rock County communities
• Customer Confidence: 60+ years serving southern Wisconsin, with Janesville-specific customer testimonials

24 Hour Home Comfort Services has a Janesville page covering HVAC and water heater services. The company discusses AC repair, air conditioning installation, AC maintenance, furnace installation, heating repair, heating maintenance, seasonal inspections, and indoor air quality.

The company's Janesville page lists 24/7 phone access and a 4.9-star rating across more than 4,400 Google reviews. Its local content emphasizes Janesville's humid summers, cold winters, and older homes with outdated HVAC systems.

• When You Can Reach Them: 24/7 service access
• Who's Fixing Your AC: HVAC and water heater technicians
• What It May Cost: Maintenance, repair, replacement, and installation options
• Local Service Fit: Regional provider with a dedicated Janesville service page
• Customer Confidence: 4.9-star rating across 4,400+ Google reviews

J.C. Heating and Cooling is based in Janesville and provides AC repair throughout Rock County. The company says it has diagnosed and repaired AC systems in the area since 1997 and services all major brands.

J.C. Heating and Cooling is an authorized Daikin Comfort Pro dealer and says it was voted Best of the Best 2025 by the Janesville community. Its AC repair page emphasizes warm air, short cycling, strange noises, and systems that cannot keep up during Janesville summer weather.

• When You Can Reach Them: Weekday scheduling with fast callback language
• Who's Fixing Your AC: Authorized Daikin Comfort Pro dealer
• What It May Cost: Financing options and repair-vs-replace guidance
• Local Service Fit: Janesville-based AC repair provider serving Rock County
• Customer Confidence: Voted Best of the Best 2025 by the Janesville community

Air Control Heating & Cooling, formerly TNR Heating & Cooling, serves Janesville and southern Wisconsin. The company states that it has served southern Wisconsin since 1998 and provides furnace and air conditioner repair in the Janesville area.

Air Control says it is licensed and insured, offers 24/7 service, and provides a 10-year parts and labor warranty. The company lists Janesville, Milton, Edgerton, Beloit, Evansville, Fort Atkinson, Clinton, Orfordville, Footville, and Fulton among its service areas.

• When You Can Reach Them: 24/7 service language
• Who's Fixing Your AC: Licensed and insured HVAC professionals
• What It May Cost: 10-year parts and labor warranty
• Local Service Fit: Janesville and southern Wisconsin service coverage
• Customer Confidence: Serving southern Wisconsin since 1998

Harker Heating & Cooling is based in Madison and has served Dane County since 1949. The company offers heating, cooling, air quality, water heaters, and 24/7 emergency HVAC repair.

Harker is a Carrier Factory Authorized Dealer and says its technicians are certified and trained to union standards. Its website lists a 4.9 rating based on 1,971 reviews.

• When You Can Reach Them: 24/7 emergency HVAC repair
• Who's Fixing Your AC: Certified technicians and Carrier Factory Authorized Dealer
• What It May Cost: Financing and seasonal specials
• Local Service Fit: Madison and Dane County provider, adjacent regional option
• Customer Confidence: 4.9 stars based on 1,971 reviews

R.A. Heating & Air Conditioning is based in Evansville, WI and provides residential and commercial HVAC service. The company lists 24/7 emergency response, air conditioning service, heating systems, new construction HVAC, geothermal systems, air purification, and duct sealing.

R.A. Heating & Air Conditioning states that it is a certified Armstrong Air and Carrier dealer. Its website also shows a 4.8 rating with 24 ratings and reviews.

• When You Can Reach Them: 24/7 emergency response
• Who's Fixing Your AC: Carrier and Armstrong Air dealer
• What It May Cost: Request-service process and emergency repair options
• Local Service Fit: Evansville-based provider serving nearby southern Wisconsin
• Customer Confidence: 4.8 rating with 24 ratings and reviews

All Seasons Heating & Cooling serves Aurora and nearby Fox Valley communities. Its Aurora AC page lists 24/7 emergency service, family ownership, NATE-certified experts, and a Price Match Promise.

The company says it has served Aurora since 1980 and handles AC repair, AC maintenance, AC installation, ductless mini-splits, and thermostat work. This makes it an adjacent-market comparison for Janesville homeowners reviewing larger regional AC providers.

• When You Can Reach Them: 24/7 emergency service
• Who's Fixing Your AC: NATE-certified experts
• What It May Cost: Price Match Promise and repair-focused service options
• Local Service Fit: Northern Illinois Fox Valley provider
• Customer Confidence: Reviews highlight timely service and thorough repairs