If you own one of the many older homes in Carol Stream, IL, that date back to the 1980s, chances are your HVAC systems are ready for an upgrade. Newer DuPage County homes, too, need updated, reliable heating and cooling systems for the best in energy efficiency and comfort.
We offer a wide selection of top-quality Trane and Mitsubishi HVAC and indoor air quality products that will keep your home comfortable during the hot, humid summers. Our family-owned and -operated business can also provide you with a free estimate for a standby generator, so you never have to live without your heating system when a snowstorm takes down the local power grid.
Call Blue Frost Heating, Cooling & Plumbing today for a free estimate on a generator, heating system, air conditioner, or indoor air quality product.

Top-Rated Heating Services
Blue Frost services all types of heating systems, including heat pumps, furnaces, and boilers. Our NATE-certified technicians provide exceptional installation, heating repair, replacement, and maintenance services to keep your home nice and warm throughout the chilly winter.
- Heat pumps: These appliances provide energy-efficient heating and cooling for year-round comfort.
- Furnaces: We offer gas and electric furnaces with both standard and high efficiencies so that you can choose the right option for you.
- Boilers: A boiler provides comfortable radiant heating to keep you cozy all winter long.
Air Conditioners in Carol Stream
During humid Illinois summers, a home air conditioning system is an absolute must. Our highly trained technicians can assist you every step of the way, from initial installation to maintenance, repairs, and replacement. We service all brands of central air conditioners, heat pumps, and ductless mini-splits.
- Replacement and installation: Upgrade to a new system for improved reliability and energy efficiency.
- Emergency AC repair: When your AC fails, you can rely on us to respond day or night.
- AC maintenance plan: Our plan includes an annual air conditioning tune-up to prepare your cooling system for summer.
- Ductless mini-splits: Mini-splits are a highly efficient cooling option for homes without ducting or those that need customizable zoning.
Air Quality Services
Indoor air quality is important for your family’s health and comfort. We can help you choose between premium products for optimal indoor air.
- Air cleaners: Using mechanical HEPA filters, these devices can remove many unwanted airborne contaminants and greatly reduce your seasonal allergy symptoms.
- Humidifiers: When the dry winter causes itchy skin and dry eyes, use a whole-home humidifier to introduce much-needed moisture into the air.
- Dehumidifiers: Humid summers can make your home feel stuffy and uncomfortable, and can make your AC work harder.
- Ductwork services: We clean and repair leaky ductwork to prevent dust from circulating through your home environment.
- Air purifiers: These devices remove airborne contaminants like dust, pollen, bacteria, and viruses.
Generator Services
When the power grid goes out, a whole-home generator can be a godsend. From powering your HVAC system and keeping the lights on to ensuring your home security system is up, a generator is an invaluable tool. We offer general maintenance and tune-ups to keep your generator in tiptop condition.
Plumbing Services
We take pride in being a full-service company you can call for all your home service needs. We’re happy to install helpful plumbing appliances in your home.
- Sump pumps: Keep floodwater out with a reliable sump pump to protect your home and belongings.
- Water heater services: We can install, replace, repair, and service your hot water heater.
- Tankless water heaters: Get hot water on demand and enjoy lower utility bills with a tankless water heater.
Commercial Services in Carol Stream
Having a reliable commercial HVAC system for your facility is a no-brainer for keeping your employees and customers comfortable. We offer a suite of commercial HVAC services, including AC tune-up and heating service.
Choose Blue Frost HVAC for All Your Home Services
Blue Frost HVAC has served the community since 1973 and is known for our exceptional customer service and lifetime repair warranties. With us, you can expect full transparency, affordable pricing, and friendly service. We’re an Angi Super Service Award winner and a proud Chamber of Commerce member.
If you need HVAC, generator, plumbing, or indoor air quality services, call Blue Frost HVAC today.
Recent Jobs and Reviews in Carol Stream, IL
Carol Stream, IL at a glance
Blue Frost Heating & Cooling has completed 20 jobs in Carol Stream, IL between September 2026 and October 2026.
The most recent job was on October 21, 2026.
Blue Frost Heating & Cooling has completed 97 jobs in Carol Stream, IL in the last 12 months.
Job Locations and Reviews
Responded to a gas-company-tagged furnace and inspected the unit following a reported gas odor. The inducer housing was found with heavy corrosion at the opening and failed sealant, with rust and debris in the cabinet. The corroded inducer assembly was serviced and resealed, the cabinet was cleaned, and the system was restored to safe, operational condition with heat returned.
Performed a complete tune-up on a 13+ year-old gas furnace, inspecting the burner compartment, igniter/flame sensor, and manifold, and noting minor surface rust on burner access panel fasteners. Verified the air filter was clean and properly seated, with no restriction to airflow. Furnace is operating normally.
Performed a full tune-up on the upright gas furnace and storage water heater, including inspection of the blower and inducer motors, gas valve and piping, burner assembly, control board wiring, and the 16x25 return filter section. Inspected the water heater pilot and thermocouple assembly and found corrosion on the burner cap along with deteriorated, crumbling combustion chamber insulation, which should be addressed to maintain safe and efficient operation. No frost, rust-through, or breakage was observed on the furnace cabinet or refrigerant and duct connections.
Responded to a no-heat call and inspected the furnace blower assembly, finding heavy dust and debris buildup on the squirrel-cage blower wheel and housing, along with corrosion on the motor shaft. Cleaned the blower assembly and verified the motor, wiring harness, and associated electrical components were intact and free of damage. Restored the system to proper operation.
Performed a seasonal heating tune-up on a 6-year-old Trane gas furnace, inspecting the cabinet, flue piping, PVC condensate/vent lines, gas piping, and relay panel connections. Verified the equipment was clean and free of visible rust, frost, or damage, and confirmed proper operation, with no deficiencies noted. Also inspected the outdoor condenser unit and pad, finding the unit clean with refrigerant lines and conduit intact.
Installed a new Lennox SL280UH090V36K 90,000 BTU horizontal gas furnace in a crawl space, connecting it to the existing coil cabinet, humidifier, PVC condensate drain, and flue venting. Reinstalled and verified thermostat operation, and completed the installation under a customer-obtained permit.
Responded to no-heat call where technician identified a cracked heat exchanger requiring system replacement. Conducted on-site evaluation of existing Trane furnace installation with integrated humidifier system in residential basement location. Documented current equipment configuration including PVC venting, humidification components, and associated ductwork to prepare comprehensive replacement proposal for homeowner review.
Completed comprehensive furnace tune-up on 15-year-old unit. Performed standard maintenance protocol including filter inspection, burner cleaning, flame sensor maintenance, blower assembly service, and full system operational testing. All components found to be functioning within normal parameters with no immediate repairs required. --- **Detailed Work Performed:** Conducted thorough visual inspection of furnace system and surrounding mechanical equipment. Verified proper clearances and ventilation requirements. Inspected heat exchanger for signs of cracks, corrosion, or deterioration using flashlight examination of accessible surfaces. Removed and cleaned burner assembly, ensuring proper flame characteristics and combustion efficiency. Cleaned flame sensor rod to ensure reliable ignition and flame detection. Inspected igniter condition and electrical connections for signs of wear or damage. Serviced blower assembly including cleaning of blower wheel and housing to remove dust and
Completed comprehensive furnace tune-up and inspection as part of BFMA maintenance agreement. Inspected all internal mechanical components including gas valve connections, burner assembly, and venting system; all connections were secure with normal operational wear observed. Replaced MERV 11 air filter to ensure proper airflow and system efficiency.
Conducted on-site assessment of 22-year-old Lennox oil furnace located in crawl space with active oil leak. Evaluated existing equipment condition, documented current thermostat setup, and provided replacement furnace estimate to client ready to proceed with new system installation.
Completed comprehensive BFMA furnace tune-up on 5-year-old residential heating system. Performed full system inspection, measured temperature differentials across heat exchanger showing 108°F supply and 42.2°F return readings, verified proper airflow through ductwork, and inspected all mechanical and electrical components including furnace, ductwork connections, and associated utility equipment to ensure optimal system performance and safety compliance.
Completed comprehensive BFMA tune-up service on 8-year-old furnace system including humidifier maintenance. Performed full inspection of blower motor assembly, gas burner components, control module, and all electrical connections. Verified proper operation of gas valve, checked all wire harnesses and connectors for secure attachment, and confirmed condensate drain lines were clear and functioning correctly.
Completed comprehensive furnace tune-up and preventive maintenance as part of recurring BFMA service agreement. Performed complete system inspection on 4-year-old residential furnace unit located in basement mechanical room, including electrical testing with clamp meter to verify proper amperage draw and system performance. All components checked, system operating within manufacturer specifications, and equipment confirmed ready for heating season.
Completed installation of a new 3-ton HVAC system including EL196UH090 furnace, ML13KC1 condenser, and 130-pint dehumidifier in commercial facility. System was sized per customer specification at 3 tons of cooling capacity, which differs from the original 5-ton load calculation based on motor heat load specifications. All equipment installed in mechanical room, properly mounted and secured with gas piping, refrigerant lines, and ductwork connections completed per manufacturer specifications and code requirements.
Completed comprehensive furnace tune-up and system inspection as part of BFMA maintenance agreement. Inspected and photographed 20x25x1 air filter showing clean condition with proper diagonal cross-hatch media pattern and verified correct installation in ductwork. Documented Bradford White water heater installation showing proper venting, copper piping connections, gas control valve assembly, and all safety labels intact and visible.
Completed comprehensive BFMA tune-up service on a 2+ year old furnace system during morning appointment window. Performed thorough inspection of heat exchanger, blower motor assemblies, electrical connections, and combustion components, confirming all systems operating within normal parameters with proper flame characteristics and airflow. Inspected humidifier system and associated plumbing connections in utility area, noting existing moisture staining on concrete surfaces but verifying all active components functioning correctly with no active leaks detected.
Responded to no heat call approximately 25 days after thermostat installation. Upon arrival, performed system diagnostics and operational testing of heating equipment. Inspected furnace, ductwork connections, and recently installed thermostat for proper configuration and operation. Cycled system through heating mode and verified all components functioning correctly. No trouble found during service visit; system operating within normal parameters and producing heat as designed.
Responded to after hours service call for residential HVAC system. Upon arrival, inspected furnace, water heater, humidifier, and thermostat to diagnose reported issue. Thermostat displayed 72°F setpoint with system in heating mode and fan operation confirmed. Verified all equipment connections, ductwork, and Aprilaire humidifier installation in utility closet were secure and functioning properly.
Completed comprehensive furnace and air conditioning tune-up on 4-year-old Trane XV80 system. Performed full inspection of gas valve, burner assembly, and heat exchanger, confirmed proper operation of all burners with characteristic blue flame pattern, verified electrical connections and wire management throughout unit, and documented equipment condition with photographs. All components found to be operating within manufacturer specifications with no deficiencies noted.
Completed comprehensive BFMA tune-up service including furnace maintenance and humidifier inspection. Performed combustion analysis with Testo 317-3 CO detector confirming safe operation with zero carbon monoxide detected at gas manifold. Noted rust-colored staining and water damage on top of furnace casing indicating potential condensation or water intrusion issues that should be monitored. Inspected all electrical connections, wiring harnesses, and internal components with furnace panel opened for full access. Verified proper operation of all mechanical systems, PVC venting configuration, and safety controls. Unit currently operating within normal parameters with humidifier found in no-trouble-found condition.