Most requested in winter
Furnace Repair
No heat, short cycling, a furnace that blows cold air or won’t light. Gas and electric furnaces, every make.
Furnace Repair in Chicago →
Chicago heating & cooling
HVAC Repair & Service in Chicago, IL
Green Leaf Heating & Cooling connects Chicago homeowners with local HVAC technicians for furnace, boiler, AC and heat pump repair, replacement and maintenance. No heat on a January night or an AC that quits in July? Call, describe what’s happening, and get a free estimate before any work starts.
56residential zip codes
124Chicago neighborhoods
Book by phone
Request HVAC service today
Call and describe the problem, whether it’s no heat, no cooling or a boiler that bangs. We connect you with a local technician.
Call Now (312) 924-7223 Open 24 hours Mon–Fri · Sat 10–4 · Sun 10–201
Free estimate firstNo work until you approve it
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Every systemFurnaces, boilers, AC, heat pumps, mini splits
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Citywide124 neighborhoods, 56 zip codes
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Weekday 24-hour linePlus Saturday and Sunday hours
Local technicians. Straight answers.
Heating and cooling in Chicago
Heating and Cooling for Chicago Homes, From Bungalows to High-Rises
Chicago’s housing is unusual for HVAC. A 1920s bungalow may still run on a cast iron boiler and radiators, a two-flat can share one boiler between both units, and a downtown condo is often heated and cooled by a fan coil under the window. Green Leaf is one phone number for all of it.
Call and describe the problem, and we connect you with a local HVAC contractor who works on your kind of system. You get a free estimate before any work starts, and nothing is done until you approve it.
Calls are answered 24 hours a day Monday to Friday, Saturday 10 a.m. to 4 p.m. and Sunday 10 a.m. to 2 p.m. (Central time), across all 56 residential zip codes in the city, from Rogers Park to Hegewisch.
- ✓ Furnace, boiler and AC repair
- ✓ New systems sized to your home
- ✓ Steam and hot-water radiator heat
- ✓ Free estimate before any work
What we do
HVAC Services in Chicago
Twelve services cover nearly every heating and cooling problem in a Chicago home. Pick the one that matches what you’re seeing, or call and describe it.
04Furnace InstallationNew and replacement furnaces, high-efficiency and modulating models, sized to your home.↗05AC InstallationCentral air installs and replacements, including homes heated by radiators with no ductwork.↗06Heat PumpsCold-climate heat pump installation and repair, plus dual-fuel systems that pair a heat pump with a furnace.↗07Ductless Mini SplitsSingle and multi-zone mini splits for two-flats, additions, attics and homes without ducts.↗08HVAC MaintenanceFurnace, boiler and AC tune-ups, safety checks and filter changes before the season starts.↗09Water HeatersTank and tankless water heater repair and replacement, no hot water, leaks and pilot problems.↗10Air Duct CleaningDuct and dryer vent cleaning, duct sealing and repair, and new ductwork.↗11Indoor Air QualityWhole-house humidifiers, air purifiers, UV lights, media filters and smart thermostats.↗12Emergency HVACNo heat in winter, no cooling in a heat wave, a carbon monoxide alarm or a leaking boiler.↗
Brands Chicago HVAC technicians commonly service
CARRIERTRANELENNOXRHEEMMITSUBISHIWEIL-McLAINBURNHAM
Why Green Leaf
One Call Instead of Comparing HVAC Companies in Chicago
Comparing HVAC companies in Chicago usually means a lot of phone calls. Here’s what one call to Green Leaf gets you.
Technicians who know Chicago systems
Steam boilers, hot-water radiators, high-velocity AC in homes without ducts and fan coils in high-rises: the technicians we connect you with work on the systems Chicago homes actually have.
A free estimate before any work
The technician looks at the problem first and explains the options in plain language. Nothing starts until you say yes.
One number for every system
Furnace, boiler, central air, heat pump, mini split, water heater or ductwork: the same number handles heating and air conditioning in Chicago, all year.
Every Chicago neighborhood
All 56 residential zip codes, from lakefront high-rises to Bungalow Belt side streets, so you don’t have to check whether a company comes to your part of town.
From call to comfort
How HVAC Service Works With Green Leaf
Tell us what’s happening: no heat, weak airflow, a boiler that bangs, an AC that runs but doesn’t cool. Mention the system’s age if you know it.
You’re connected with a local HVAC technician who covers your neighborhood and sets a time to come out.
The technician finds the cause and walks you through repair or replacement options, each with a free estimate.
Work starts only after you approve it. The system is then run through a full cycle so you know it’s working.
STEP 01Call and describe it
Tell us what’s happening: no heat, weak airflow, a boiler that bangs, an AC that runs but doesn’t cool. Mention the system’s age if you know it.
Call before it gets worse
Common HVAC Problems in Chicago Homes
Three calls that come up again and again in Chicago’s older housing.
Ask a proNo heat on the coldest night of the year
A failed igniter, flame sensor or blower motor can shut a furnace down, and boilers stop on low water or a failed circulator. A technician tests each part in turn to find the one that stopped it.
Radiators that stay cold or bang
Cold radiators usually mean trapped air or an unbalanced system; banging steam pipes usually mean water collecting in the lines. Both can be fixed.
AC running but not cooling
A dirty coil, low refrigerant from a leak or a failed capacitor are the usual causes when the air comes out warm in July.
Calls answered 24 hours a day, Monday to Friday
No Heat in Chicago?
Call (312) 924-7223, describe what’s happening, and get connected with a local HVAC technician. You get a free estimate before any work starts.
Call (312) 924-7223Open 24 hours Mon–Fri · Sat 10–4 · Sun 10–2
Local by design
Serving All of Chicago, Neighborhood by Neighborhood
We cover all 56 residential zip codes inside the city of Chicago, from Rogers Park and Edison Park on the north edge to Mount Greenwood and Hegewisch in the south. Every neighborhood has its own page describing the heating and cooling systems its homes tend to have.
- Downtown & Near North
- The Loop
- New Eastside
- Lakeshore East
- Printer’s Row
- South Loop
- Prairie District
See all 124 Chicago neighborhoods →
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Not sure you’re covered? Call (312) 924-7223 with your zip code and we’ll check.
Good questions
HVAC Questions From Chicago Homeowners
Short answers to what Chicago homeowners ask most before they call.
(312) 924-7223Furnace repair and installation, boiler repair, AC repair and installation, heat pumps, ductless mini splits, seasonal maintenance, water heaters, air duct cleaning and indoor air quality. If it heats, cools or moves air in your home, call and describe it.
All 56 residential zip codes in the city of Chicago, covering 124 neighborhoods from Rogers Park and Edison Park in the north to Mount Greenwood and Hegewisch in the south. The service area page lists every one. Call with your zip code if you’re not sure.
Yes. Steam and hot-water boilers are common in Chicago bungalows, two-flats and courtyard buildings, and the technicians we connect you with repair boilers, radiators, circulator pumps, valves and radiant floor heat. See boiler repair in Chicago.
Usually, yes. A home heated by radiators has no ductwork, so the options are a high-velocity system with small flexible ducts run through closets and the attic, or ductless mini splits. A technician can tell you which suits your home.
Cold-climate heat pumps keep heating well below freezing, and many Chicago homes pair one with a gas furnace that takes over on the coldest days, a setup called dual fuel. How well it works depends on sizing and how well the home holds heat.
Check that the thermostat is set to heat, the furnace switch is on, the breaker hasn’t tripped and the filter isn’t clogged. If it still won’t run, call (312) 924-7223. If you smell gas, leave the house first, then call Peoples Gas or 911 from outside.
Calls are answered 24 hours a day Monday to Friday, Saturday 10 a.m. to 4 p.m. and Sunday 10 a.m. to 2 p.m. (Central time). That covers weekday evenings and overnight, when a furnace is most likely to quit.
Call (312) 924-7223 and describe the problem. You’re connected with a local HVAC technician who looks at it and gives you a free estimate before any work starts.
Ready when you are
Need HVAC Service in Chicago?
Call (312) 924-7223, describe the problem, and get a free estimate before any work starts.
Call Now
Book by phone
Call a Chicago HVAC Technician
Call (312) 924-7223 and describe what’s happening. Calls are answered 24 hours a day Monday to Friday, Saturday 10 a.m. to 4 p.m. and Sunday 10 a.m. to 2 p.m. (Central time).
Call us(312) 924-7223
Hours (Central)Open 24 hours Mon–Fri · Sat 10–4 · Sun 10–2
Service areaChicago, IL · 56 residential zip codes