Family-owned. Locally focused.
Local people.
Lasting comfort.
Plainfield, IL Heating & Cooling Services Built Around Your Home
After-hours repair pricing confirmed when you book.
AI team photo concept- Family-owned
- Clear options before work begins
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Your home. Our everyday focus.
Heating
Repairs, replacements and efficient heating solutions.
Cooling
AC service, repairs and whole-home comfort.
Maintenance
Keep your system running at its best, year-round.
Know what happens next.
How we workChoose repair or replacement
Pick the path that fits.
Review your options
Clear, upfront pricing first.
Approve the work
Nothing starts without your OK.
Services & straightforward pricing
Cooling
AC Repair, Installation & Maintenance
Air conditioners, heat pumps and ductless mini-splits, with same-day diagnostics when availability allows.
| Service | Typical price |
|---|---|
AC Repair | $150–$600 |
AC Installation & Replacement | $5,000–$10,000 |
Ductless AC Installation & Mini-Splits | From $3,000/zone |
AC Maintenance | $119 |
Heating
Furnace Repair, Replacement & Heating Maintenance
Furnaces, heat pumps, tune-ups and combustion safety checks, with no-heat calls answered 24/7.
| Service | Typical price |
|---|---|
Furnace Repair | $150–$600 |
Furnace Installation & Replacement | $5,000–$9,000 |
Heat Pump Repair & Installation | $5,500–$10,000 |
Heating Maintenance & Tune-Up | $119 |
Repair diagnostics: $119 during regular hours. After-hours pricing confirmed when you book. Replacement estimates are free.
Full-service HVAC
Complete HVAC service, from repair to replacement
Trusted HVAC contractor in Plainfield, IL for furnace repair, AC repair, AC replacement and furnace replacement. Serving Naperville and Chicago’s western suburbs.
Repair, replacement, maintenance, heat pumps, ductless mini-split installation and indoor air quality, on every major brand. Every recommendation fits the home, not a sales quota.
What people say
See Why Homeowners Give FortHouse 5.0 Stars
“We recently had our air conditioner and furnace replaced, and the entire experience was excellent from start to finish. The team was professional, knowledgeable, and took the time to explain all of our options without any pressure.”
Michael FabianLocal Guide · AC & furnace installation “The technician showed us all his tests, and thoroughly inspected the unit. We elected to replace our full system with FortHouse — they were able to do the install the next day. We will be using them from now on.”
Nova G.AC replacement · Montgomery, IL “I've worked with FortHouse for a couple years now. If you're in need of HVAC services, they're the guys to call. Honest, professional, and reasonable pricing.”
Francis LinekLocal Guide · Repeat customer “Absolutely, the best service, hands-down, super professional, courteous, technician answered all my questions and concerns with my equipment, I had problems with my thermostat for years, and the technician was able to solve it within a couple minutes of diagnosing it.”
DavidThermostat repair
Where we work
HVAC Service Areas Near Plainfield, IL
A tight radius on purpose, so a tech can reach you the same day.
Not on the list? Call and ask — we make exceptions.
Resources
HVAC Answers for Chicagoland Homeowners
Common questions
Frequently Asked HVAC Questions
Do you offer emergency HVAC service?
Yes — 24/7, including nights, weekends, and holidays. A no-heat night in January or a no-AC day in July doesn't wait for business hours.
Read more about our emergency HVAC serviceHow much does a diagnostic visit cost?
$119 during regular hours, with additional fees for overtime and emergency after-hours calls. That's a real diagnostic — pressures, amp draw, a written readout — not a flat trip charge.
See all HVAC servicesAre replacement estimates free?
Yes. Replacement estimates are free, and you get the price in writing before any work starts. A complete furnace-and-AC system typically runs $10,000–$20,000 installed; a furnace alone, $5,000–$9,000; an air conditioner alone, $5,000–$10,000.
See HVAC replacement costsHow do I schedule service or a free estimate?
Book online at book.forthousehvac.com or call (630) 318-6246. Repair visits start with the $119 diagnostic during regular hours; replacement estimates are free. No-heat and no-AC calls are answered 24/7.
Book onlineWhat areas do you serve?
Plainfield, Naperville, Yorkville, Bolingbrook, Oswego, Wheaton, Lisle, Minooka, Shorewood, and Aurora. If you're just outside that list, call and ask — we make exceptions for a reasonable drive.
See our full service areaWhat brands do you install and service?
Trane, Lennox, Carrier, Goodman, Bryant, and Rheem, along with most other major residential equipment.
Learn more about FortHouseSame comfort.
A stronger tomorrow.
Meet FortHouse 
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Tell Us What the System Is Doing
Describe the symptom and we will tell you what it usually means, what it typically costs, and the earliest available appointment. No obligation on the call.