Rated 5.0 on Google
Real reviews from Fort Smith and River Valley customers — posted straight to Google, not written by us.
Fort Smith, AR · Sebastian County · 72901 – 72916
HVAC Company in Fort Smith, AR AC Repair, Heating & Installation
AC blowing warm in August or a furnace that won’t light on the first cold night? Clark HVAC runs same-day AC repair, heating repair, HVAC installation, and maintenance calls across Fort Smith every day — from Belle Grove and downtown out to Fianna Hills and Chaffee Crossing. Family-owned, licensed in Arkansas and Oklahoma, residential and commercial, with straight answers and upfront pricing.
Prefer to text? Text us at 918-839-3734
- 24/7 Emergency Service
- Same-Day When Possible
- Licensed in AR & OK
- EPA Certified
- Upfront Pricing
- Family-Owned, Local
- Financing Available
Heating & Cooling
HVAC Services We Run in Fort Smith
Residential and commercial heating and cooling for Fort Smith homes, rentals, offices, restaurants, churches, shops, and new construction. Most brands, whoever installed it.
AC Repair
Warm air, a frozen coil, dead on the hottest day of the year, or running nonstop and never catching up. Same-day AC repair across Fort Smith whenever the schedule allows.
AC Repair details →Furnace & Heating Repair
No heat, blowing cold, short cycling, or won’t light. Gas furnaces, electric heat, and heat pump heating for Fort Smith homes and businesses.
Furnace & Heating Repair details →24/7 Emergency Service
Nights, weekends, and holidays. A real person answers the phone, and we tell you the overtime rate before we roll.
24/7 Emergency Service details →HVAC Installation & Replacement
Properly sized, code-compliant systems for homes and businesses. Most residential installs are finished in a day. Financing available with approved credit through Synchrony.
HVAC Installation & Replacement details →Heat Pump Repair & Install
Year-round heating and cooling from one system — a good fit for a lot of Fort Smith homes, especially all-electric ones.
Heat Pump Repair & Install details →Ductless Mini-Splits
Sunrooms, additions, garages, bonus rooms, and older Fort Smith homes without ductwork.
Ductless Mini-Splits details →HVAC Maintenance
Spring and fall tune-ups that catch small problems before they become a no-cool call in July or a no-heat call in January.
HVAC Maintenance details →Commercial HVAC
Rooftop units, split systems, and maintenance agreements for restaurants, retail, offices, churches, and warehouses across Fort Smith.
Commercial HVAC details →Indoor Air Quality
Filtration, purification, and humidity control for Fort Smith’s sticky summers and dusty older homes.
Indoor Air Quality details →Smart Thermostat Installation
Ecobee, Nest, Honeywell, and Sensi installed and set up right — including the C-wire many older Fort Smith homes are missing.
Smart Thermostat Installation details →New Construction HVAC
Duct design, rough-in, trim-out, and startup for builders, contractors, and owner-builders in Fort Smith and Sebastian County.
New Construction HVAC details →HVAC Financing
Financing available with approved credit through Synchrony on new installations and major repairs, including plans with no interest if paid in full within the promo period.
HVAC Financing details →Recent Clark HVAC work
Local Service
Serving Every Part of Fort Smith
Fort Smith is our largest service area. Our crews are in town every day running repairs, installs, maintenance, and commercial calls — it’s a daily route for us, not a special trip.
We work on homes everywhere from the historic Belle Grove District downtown to the cul-de-sacs of Fianna Hills, the new builds in Chaffee Crossing, the older streets of Park Hill, Cavanaugh, and Sunnymede, and out toward Massard and South Fort Smith. Older homes downtown tend to have aging ductwork and undersized returns. Newer builds out south run high-efficiency equipment that has to be set up correctly to deliver what it promises. Knowing the difference means faster diagnostics and repairs that hold up.
Where we work in and around Fort Smith
- Downtown, Garrison Avenue, and the Belle Grove Historic District (72901)
- Park Hill, Cavanaugh, and the Rogers Avenue business corridor (72903)
- North Fort Smith and Maybranch (72904)
- Chaffee Crossing, Massard, and South Fort Smith (72908)
- Fianna Hills and the neighborhoods off Highway 71 South (72916)
- Homes and businesses near UAFS, Mercy Fort Smith, Baptist Health, and Ben Geren Park
- Neighboring Van Buren, Barling, Greenwood, Lavaca, Hackett, Alma, Bonanza, and Pocola
Same-day service on most Fort Smith calls. Not sure you’re in range? Call and ask — the answer is usually yes.
Most Common AC Calls
AC Problems We Fix Every Week in Fort Smith
Fort Smith’s humidity, summer storms, and older housing stock create predictable failures. These are the calls our techs run most often — and a lot of them are same-day fixes.
Frozen evaporator coil
River Valley humidity plus a dirty filter or a low refrigerant charge freezes the indoor coil solid. We find the real cause instead of thawing it and leaving.
Failed capacitor
The most common reason an AC won’t start in a Fort Smith summer. Weeks of 95-degree afternoons cook capacitors. Our trucks carry replacements, so this is usually a same-day fix.
Refrigerant leak
Older systems in Park Hill, Sunnymede, and downtown lose refrigerant slowly. If your AC runs constantly but never gets cold, we find the leak and repair it properly instead of just topping it off.
Dirty condenser coil
Cottonwood, pollen, grass clippings, and dust choke outdoor units. A proper coil cleaning restores lost capacity and takes strain off the compressor.
Clogged drain line
Algae loves Fort Smith’s humid air. A blocked condensate line can shut the system down or drip through a ceiling. We clear it and treat it.
Storm and surge damage
Spring and summer storms hit outdoor units hard. Blown contactors, fried control boards, and surge damage get diagnosed the same day whenever we can get there.
Other calls we run all the time
- Heat pump stuck in defrost or blowing cool air in heating mode
- Thermostat that won’t hold a setting or a system that short cycles
- Hot and cold spots between rooms, or an upstairs that never cools
- High electric bills from tired equipment or leaky ductwork
- Strange noises, burning smells, or breakers that keep tripping
- Systems past their useful life that keep needing repairs
Not sure which one you’ve got? Call 918-839-3734 and we’ll diagnose it — most Fort Smith calls get same-day service. If you want the long version first, our AC repair page walks through how we work.
Before Winter Hits
Signs Your Furnace Won’t Make It Through a Fort Smith Winter
Fort Smith winters are short but mean. Ice storms roll through the River Valley most years, and sudden cold fronts out of Oklahoma push furnaces past their limits. Catch these warning signs before yours quits during the coldest week of the year.
Strange smells at startup
A little dust smell on the first run of the season is normal. A burning or metallic smell that doesn’t fade — or anything that smells like gas — is not. Shut it down and call.
Yellow flame, not blue
A healthy gas flame burns steady blue. Yellow or flickering flames mean incomplete combustion, which is a safety issue, not a wait-and-see issue.
A sudden spike in your bill
If your AOG gas bill or OG&E electric bill jumps without weather to explain it, the system is fighting itself — and inefficiency in December usually turns into a breakdown by January.
Uneven heating
Cold bedrooms upstairs and a hot hallway by the thermostat can be a blower problem, a duct problem, or a system that was never sized right for the house.
Banging, booming, or squealing
A boom at ignition points to delayed ignition. Squeals point to bearings. Rattles are usually loose ductwork. All of them get worse, not better.
15+ years old with no tune-ups
A furnace that age without maintenance is on borrowed time. A pre-season check can buy it another winter — or tell you it’s time to plan a replacement before it decides for you.
Heat pump heating has its own winter failures — stuck defrost boards, backup heat that never kicks in, outdoor units iced over after a storm. We handle furnace repair and heat pump work all winter, and no-heat calls move to the front of the line when it’s freezing. Want a head start? Read our guide to furnace repair in Fort Smith, or book a pre-season tune-up before the first cold front.
Built For River Valley Weather
HVAC That Can Handle a Fort Smith Year
Fort Smith sits in the Arkansas River Valley, which means humid 95-degree summers, ice storms, and spring weather that changes its mind by the hour. Every season puts its own strain on heating and cooling equipment, and we see the results on service calls all year long.
Summer: humidity is the real enemy
When it’s 95 degrees with humidity over 80 percent, an air conditioner in Fort Smith isn’t just removing heat — it’s pulling gallons of water out of the air every day. That’s why systems here run longer, why undersized or aging units never seem to catch up, and why motors, capacitors, and compressors wear out sooner than they would in a drier climate.
It’s also why indoor humidity creeps past 60 percent in older homes: condensation on supply registers, musty closets, dust mites in carpet, and eventually mold inside ductwork. A correctly sized system paired with a real indoor air quality solution handles both problems at once. Persistent moisture also corrodes coils — an annual coil cleaning is what keeps a Fort Smith condenser from rusting out early.
Winter: ice storms and cold snaps
The first hard freeze is when ignitors, flame sensors, and gas valves that limped through last winter finally fail. Ice storms bring power surges and iced-over heat pumps, and a cold front that drops 40 degrees overnight will find every weak part in a furnace. No-heat calls get priority when it’s freezing.
Spring and fall: storm season and tune-up season
Spring storms knock out power and send surges through control boards, and wind fills outdoor coils with debris. Spring and fall are also the right time for seasonal maintenance — a cooling tune-up before summer and a heating check before winter catch most problems while they’re still cheap to fix.
We size every system we install for real River Valley conditions — the humidity load, not just the square footage. That’s a big part of why our installs hold up through August and January alike.
Fort Smith Commercial HVAC
Keeping Fort Smith Businesses Running
When the AC quits at a restaurant on Garrison Avenue, customers walk out. When a rooftop unit fails at a store on Rogers Avenue, the whole afternoon is lost. Commercial HVAC downtime costs Fort Smith businesses real money, and we move accordingly.
Clark HVAC services restaurants, retail, offices, warehouses, churches, daycares, salons, gyms, medical and dental offices, and light industrial buildings across Fort Smith. We work on rooftop package units, split systems, ductwork, and controls, and we can set up a preventative maintenance agreement so your equipment gets tuned up twice a year — and your business stops being surprised by breakdowns during peak season.
Property managers, building owners, restaurant operators, franchisees, and church facility teams: one call, one crew, and a straight answer on repair versus replacement. See our commercial HVAC services, or read about commercial HVAC repair in Fort Smith.
New Systems & New Construction
HVAC Installation and Replacement in Fort Smith
Whether it’s a full system changeout on an older Park Hill home, a heat pump for a rental, or ductwork and equipment for a new build in Chaffee Crossing, we install properly sized, code-compliant systems and start them up right.
We install York equipment sized with a room-by-room load calculation and backed by a 10-year parts and 1-year labor warranty. Most residential installs are finished in a single day — condenser, indoor furnace or air handler, line set, thermostat, and any ductwork changes the house needs. See our HVAC installation page for how the process works.
Builders and contractors: we handle new construction HVAC from duct design and rough-in through trim-out, startup, and inspection for homes, barndominiums, shops, and light commercial buildings around Fort Smith and Sebastian County. Ask for Brody about builder pricing.
Adding a sunroom, finishing a garage, or fighting one room that never cools? Ductless mini-splits are the right tool for a lot of Fort Smith additions and older homes without ductwork.
Financing is available with approved credit through Synchrony, including plans with no interest if paid in full within the promo period. Ask about it when you call, or start on our financing page.
Straight Answers
What Drives the Cost of an HVAC Repair in Fort Smith
We don’t quote repairs sight-unseen, because two “AC not cooling” calls can be completely different jobs. What we can do is tell you exactly what moves the price — and give you the number before any work starts.
- What actually failed. A capacitor or contactor is a quick fix. A compressor or heat exchanger is a bigger conversation — and sometimes the honest answer is to put that money toward replacement instead.
- Refrigerant type. Older R-22 systems cost more to keep alive because that refrigerant is phased out and getting harder to find. Newer refrigerants are more affordable to recharge after a leak is repaired.
- Age and condition. On a well-maintained system, one failed part usually means one repair. On a 20-year-old unit, we’ll tell you if more failures are likely close behind.
- Where the equipment sits. A unit in a tight attic in an older downtown home, or up on a roof on Rogers Avenue, takes longer to work on than one sitting beside the house.
- When you call. Office hours are Monday–Friday, 7:30am–4:30pm. True emergencies get handled 24/7, and after-hours calls bill at our overtime rate — we tell you that before we head your way, not after.
Either way it works the same: we diagnose it, explain your options in plain English, and you approve the price before we touch a wrench. Already have a quote from someone else that feels high? We’re happy to give a second opinion.
Honest Recommendations
Repair or Replace? We’ll Tell You Straight
Our rule is simple: if a repair makes sense, we say so. Nobody at Clark HVAC gets paid to talk you into a system you don’t need.
That said, there’s a point where repairs stop being the smart money. It’s usually worth pricing a replacement when a system is 15+ years old and needs a major component, when it still runs on phased-out R-22 refrigerant, when it’s needed multiple repairs in the last couple of summers, or when it runs constantly and the electric bill shows it. We’ll lay out both paths — repair cost versus replacement — and let you decide. Our repair-or-replace guide for Fort Smith covers the details.
When replacement is the right call, we install York systems matched to your home, not a one-size-fits-all changeout — central AC and gas furnace systems, heat pumps, and ductless mini-splits. Every install is sized with a room-by-room load calculation and backed by a 10-year parts and 1-year labor warranty.
How It Works
From Call to Comfort in Three Steps
No confusing process and no pushy salespeople — just a real tech, a clear answer, and a fix you approved.
Call or text
Reach us at 918-839-3734 any time, day or night. A real person answers and gets you on the schedule — no phone tree, no call center.
Same-day diagnosis
Our tech arrives, finds the actual problem, and gives you the price before any work starts. No guessing, no surprise line items.
Fix it right
You approve it, we fix it — on the spot whenever the part is on the truck — clean up, and leave you comfortable again.
Why Fort Smith Calls Clark
Local Techs Who Answer the Phone
Licensed, insured, EPA certified
Licensed and insured in both Arkansas and Oklahoma, with EPA-certified technicians on every call.
24/7 emergency service
AC out on a 100-degree afternoon or no heat on a January night — we answer. After-hours calls are billed at our overtime rate, and we tell you that before we roll.
Upfront pricing
You hear the price before the wrench comes out. No surprise line items when the invoice shows up.
Local crews, not a call center
Family-owned and based in Spiro, OK, with crews in Fort Smith every day. When you call, you reach Clark HVAC — not a dispatcher two states away.
No high-pressure sales
If the fix is a capacitor, we install a capacitor. Nobody here works off a commission script, and we will tell you when a repair is not worth it.
Second opinions welcome
Been told you need a whole new system? We are glad to take a look and tell you what we actually find.
Customer Reviews
What Fort Smith Customers Say
Real reviews from Google. You can read more of our verified Google reviews at the top of this page.
★★★★★“Excellent company! Diagnosed and fixed my air conditioner same day! Definitely will be using them from now on!”
★★★★★“I highly recommend this company! Fast, great, friendly service! Our A/C went completely out, they came same day, fixed it fast with friendly service.”
★★★★★“Brand new unit installed, fantastic service, easy to work with.”
Service Area
Also Serving Nearby Towns
Based in Spiro, OK and running calls on both sides of the state line.
- Van Buren, AR
- Barling, AR
- Greenwood, AR
- Lavaca, AR
- Hackett, AR
- Alma, AR
- Charleston, AR
- Pocola, OK
- Arkoma, OK
- Roland, OK
- Muldrow, OK
- Spiro, OK
- Poteau, OK
- Sallisaw, OK
- Heavener, OK
- Howe, OK
- Stigler, OK
- Cameron, OK
- Shady Point, OK
Our Services
- AC Repair
- Furnace Repair
- Emergency 24/7 HVAC
- HVAC Installation
- Heat Pump Services
- Ductless Mini-Splits
- HVAC Maintenance
- Smart Thermostats
- Indoor Air Quality
- Commercial HVAC
- New Construction HVAC
- Financing
- HVAC FAQs
More Fort Smith reading
Who You’re Calling
About Clark HVAC — Serving Fort Smith From Spiro, OK
Clark HVAC is a family-owned heating and air company headquartered at 21196 Jake Smith Rd, Spiro, OK 74959 — licensed and insured in both Arkansas and Oklahoma, with EPA-certified technicians.
Fort Smith is our largest service area. Our crews are in town every day covering residential, commercial, and new construction work across Sebastian County: repairs, full system changeouts, ductwork, mini-splits, maintenance agreements, and indoor air quality. Same team, same fully stocked trucks, whether you’re calling from a house in Fianna Hills, a rental in Park Hill, or a restaurant on Garrison Avenue.
The office answers Monday–Friday, 7:30am–4:30pm, and emergency calls get through 24/7 — call 918-839-3734 or request service online.
Questions
Fort Smith HVAC FAQs
Don’t see your question? Call 918-839-3734 and we’ll answer it on the spot.
How fast can Clark HVAC get to my Fort Smith home?
Fort Smith is our largest service area and our crews are in town every day, so most calls get same-day service when the schedule allows — from Belle Grove and Park Hill out to Fianna Hills, Chaffee Crossing, and South Fort Smith. No-cool and no-heat calls move to the front of the line in extreme weather. Call us and we’ll tell you honestly where you land in the schedule.
Do you offer 24/7 emergency HVAC repair in Fort Smith?
Yes — true 24/7 emergency service for AC, furnace, heat pump, and mini-split breakdowns across Fort Smith and Sebastian County, including holidays. A real person answers the phone. Office hours are Monday through Friday, 7:30am to 4:30pm, and calls outside those hours are billed at our overtime rate, which we tell you before we head your way. See our emergency HVAC service page.
You’re based in Oklahoma — are you licensed to work in Arkansas?
Yes. Clark HVAC is licensed and insured in both Arkansas and Oklahoma, with EPA-certified technicians. We’re headquartered in Spiro, OK, and Fort Smith is where we run more calls than anywhere else.
How much does an HVAC service call cost in Fort Smith?
We use upfront pricing on every job: a tech diagnoses the problem, explains your options, and you see the total price before any work begins — no surprise charges and no commission-driven upsells. Call 918-839-3734 for today’s diagnostic rate.
Do you finance new AC and furnace installations in Fort Smith?
Yes. Financing is available with approved credit through Synchrony on new HVAC installations and major repairs throughout Fort Smith and the River Valley, including plans with no interest if paid in full within the promo period. Ask when you call, or start on our financing page.
What HVAC brands do you service in Fort Smith?
Every major brand — Carrier, Trane, Lennox, Goodman, Rheem, Ruud, Bryant, York, American Standard, Mitsubishi, Daikin, and more — for central AC, furnaces, heat pumps, package units, and ductless mini-splits. You don’t have to have bought it from us for us to repair it. When we install new equipment, we install York.
Do you service commercial properties in Fort Smith?
Yes — commercial HVAC is a big part of our work. We service restaurants on Garrison Avenue, retail along Rogers Avenue, offices, warehouses, churches, daycares, and light industrial buildings throughout Fort Smith, including rooftop package units and split systems. Maintenance agreements and 24/7 emergency dispatch are available. See commercial HVAC services.
Do you work with Fort Smith property managers and builders?
We do. Property managers get one number to call for every unit and a straight answer on repair versus replacement. Builders and contractors get new construction HVAC from duct design and rough-in through trim-out, startup, and inspection. Ask for Brody about builder pricing.
Do you install ductless mini-splits in Fort Smith for sunrooms and additions?
Absolutely. Ductless mini-splits are the right tool for the historic homes in Belle Grove, sunrooms, finished garages, home additions, bonus rooms, and offices without existing ductwork. We size, install, and service mini-split systems across Fort Smith.
Why does my AC keep freezing up in Fort Smith summers?
Three common causes: a dirty air filter restricting airflow over the evaporator coil, low refrigerant from a slow leak, or a failing blower motor. Fort Smith’s River Valley humidity makes all three show up faster. If you see ice on the indoor unit or the copper lines, shut the system off and call — running it that way can burn out the compressor.
How often should I have my HVAC serviced in Fort Smith?
Twice a year: a cooling tune-up in spring before the humidity hits, and a heating check in fall before the first cold front sweeps down the River Valley. Seasonal maintenance catches weak capacitors, dirty coils, and low refrigerant while they’re still small problems — and it keeps a Fort Smith condenser from corroding out early.
Can you install a smart thermostat in my older Fort Smith home?
Yes — we install and set up all the major smart thermostats (ecobee, Nest, Honeywell, Sensi). Older homes in Belle Grove, Park Hill, and downtown are often missing the C-wire most smart thermostats need, and we add it as part of the job. We set up the app on your phone before we leave. See smart thermostat installation.
Do you do full HVAC system replacements in Fort Smith?
Yes. Full system changeouts are a big part of what we do in Fort Smith — condenser, indoor air handler or furnace, line set, thermostat, and ductwork modifications when needed. We install York equipment sized with a room-by-room load calculation, backed by a 10-year parts and 1-year labor warranty, and most residential installs are finished in a single day. See HVAC installation.
What Fort Smith ZIP codes and neighborhoods do you serve?
All of Fort Smith — 72901 (downtown and Belle Grove), 72903 (Park Hill and Cavanaugh), 72904 (north Fort Smith and Maybranch), 72908 (Chaffee Crossing and South Fort Smith), and 72916 (Fianna Hills) — plus Van Buren, Barling, Greenwood, Lavaca, Alma, Hackett, Bonanza, and the surrounding Sebastian and Crawford County communities. Not sure you’re in range? Call 918-839-3734.
Need Heating or AC Help in Fort Smith?
Call and talk to a real local tech. We’ll tell you what’s wrong and what it takes to fix it — no pressure, no guessing.
Financing available with approved credit through Synchrony.
Clark HVAC · 21196 Jake Smith Rd, Spiro, OK 74959 · 918-839-3734