Mon–Sat 7am–8pm · Same-day service
Heating and AC repair that gets you comfortable again today.
Furnace and air conditioning repair, tune-ups and new systems across Naperville, Aurora, Bolingbrook and nearby towns.
- Licensed & insured in Illinois
- Same-day service, 6 days a week
- Free estimates on new systems
- Maintenance plans available
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Services
Heating & cooling services
How it works
From uncomfortable to comfortable, in three steps
- 01
Tell us what you need
Call, send the form, or ask the chat assistant — day or night.
- 02
We confirm a time
A real person gets back to you to schedule.
- 03
You're comfortable again
A technician diagnoses the system and gets it running.
About us
Local technicians who explain before they fix
Demo Heating & Air has kept homes in the western suburbs warm in winter and cool in summer since 2010. Our technicians walk you through what they find and give you the options, so you decide.
“My dad ran this kind of shop for thirty years. I kept his rule: show the customer what you found, give them the options, and never sell a system someone doesn’t need.”
- Licensed & insured in Illinois
- All major furnace and AC brands
- Maintenance plans with priority scheduling
Reviews
What customers say
Example reviews for this demo — a real site shows the business's own.
- ★★★★★
“Furnace quit on the coldest night of the year. Tech was here by 9am and we had heat by 10.”
Laura K. · Naperville
- ★★★★★
“Gave us a straight answer on repair versus replace, and didn’t push the expensive option.”
Tom W. · Plainfield
- ★★★★★
“The maintenance plan reminders are great — I never have to remember the tune-up.”
Denise R. · Bolingbrook
Good to know
The details, before you call
Brands we service
- Carrier
- Trane
- Lennox
- Rheem
- Goodman
- Mitsubishi ductless
Payment
- Credit and debit cards
- Checks
- Financing on new systems
Good to know
- NATE-certified technicians
- Maintenance plan with priority scheduling
- Help with utility rebates on high-efficiency systems
Service area
Local to the Chicago western suburbs
Not sure if you're covered? Call or send a request — nearby towns usually are.
- Naperville
- Aurora
- Bolingbrook
- Plainfield
- Oswego
- Woodridge
- Lisle
FAQ
Common questions
Can you come today?
Usually, yes. We offer same-day service Monday through Saturday — call early for the best chance at a morning slot.
Do you offer maintenance plans?
Yes. The plan covers a spring AC tune-up and a fall furnace tune-up each year, plus priority scheduling.
Should I repair or replace?
It depends on the age of the system and the repair. The technician will give you both options and the cost of each.
Do you give free estimates?
Yes, for new system installations. Repairs are diagnosed on site.
No heat or no AC? We can help today.
A system that’s struggling usually costs more the longer it runs. Call and we’ll get it looked at.