Rated 5.0 on Google
Real reviews from homeowners and businesses across Fort Smith, Poteau, Spiro, and the River Valley — posted straight to Google, not written by us.
Fort Smith · Poteau · Pocola · Spiro
Smart Thermostat Installation Done Right the First Time
Want to control your heat and air from your phone, cut the waste when nobody’s home, and stop fighting a thermostat nobody can program? Clark HVAC installs and sets up Nest, ecobee, Honeywell, and other major smart thermostats across Fort Smith, Poteau, Pocola, Spiro, and the River Valley — including the wiring work a lot of homes need to make them run right.
- Nest · ecobee · Honeywell
- C-Wire & Wiring Fixes
- Heat Pump Compatible
- Licensed in OK & AR
- Upfront Pricing
- We Show You How It Works
Why Go Smart
What a Smart Thermostat Actually Does for You
It’s not a gadget — set up properly, it’s the cheapest efficiency upgrade you can make to a heating and cooling system.
Lower bills without thinking about it
Schedules and occupancy sensing cut runtime when the house is empty or asleep — the biggest waste in most homes.
Control from anywhere
Coming home early, left for a week, or a tenant calls? Adjust it from your phone.
Catches problems early
Alerts when the system isn’t reaching temperature, the filter is due, or the house is getting too humid.
Even temperatures
Remote room sensors stop the back bedroom from freezing while the hallway thermostat says everything’s fine.
Works with heat pumps — if wired right
Heat pumps, dual-fuel, and multi-stage systems need correct wiring and configuration. That’s the part DIY installs get wrong.
Voice and smart-home control
Alexa, Google, and Apple Home integration for the people who want it. Simple buttons for the people who don’t.
Humidity control
Pair it with a whole-home humidifier or dehumidifier and let the thermostat manage both.
Usage reports
See how many hours your system ran and when — useful for catching a failing system before it dies.
The C-wire problem
Many River Valley homes built before the mid-2000s have no common (C) wire at the thermostat. Smart thermostats need constant power, and the workarounds that ship in the box cause short cycling and dead batteries. We run or adapt the wiring properly so the thermostat — and your equipment — works the way it should.
What to Expect
How a Thermostat Install Works
Usually one visit, and you walk away knowing how to use it.
Pick the right thermostat
We check your system type — gas, heat pump, dual-fuel, multi-stage, zoned — and recommend a model that actually supports it. Bring your own or let us supply it.
Wiring and power
We verify the C-wire, fix or run wiring as needed, and check the control board so nothing gets damaged.
Install and configure
Mounted, wired, configured for your equipment (this is where staging, fan, and aux heat settings matter), and connected to your Wi-Fi.
We show you how to use it
Schedules, the app, sensors, and what the alerts mean. We don’t leave until you can run it.
Install · Upgrade · Fix
Smart Thermostat Services
For homeowners, landlords and property managers, and small businesses.
Installation & upgrades
- New smart thermostat installation — Nest, ecobee, Honeywell Home, and other major brands
- Replacing old manual or basic programmable thermostats
- C-wire runs and power adapters done properly
- Heat pump, dual-fuel, and multi-stage configuration
- Remote room sensors for uneven homes
- Multiple thermostats for zoned systems and rental properties
Troubleshooting & setup
- Thermostat short-cycling or rebooting (usually a power/wiring issue)
- System not responding to the thermostat
- Aux/emergency heat running when it shouldn’t
- Wi-Fi and app setup, account and scheduling help
- Thermostats wired wrong by a previous install
- Honest advice if your current thermostat is fine and you don’t need a new one
Recent Clark HVAC work
Why Clark HVAC
Local Techs Who Answer the Phone
Licensed, insured, EPA certified
Licensed and insured in both Oklahoma and Arkansas, with EPA-certified technicians on every call.
24/7 emergency service
AC out on a 100° 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 running Fort Smith, Poteau, and the whole River Valley 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. We are not working 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.
Service Area
Smart Thermostat Installation Across the River Valley
Headquartered in Spiro, OK and running calls on both sides of the state line — Fort Smith, Poteau, Pocola, Spiro, and the surrounding River Valley and Eastern Oklahoma towns.
- Fort Smith, AR
- Poteau, OK
- Pocola, OK
- Spiro, OK
- Greenwood, AR
- Van Buren, AR
- Sallisaw, OK
- Heavener, OK
- Alma, AR
- Barling, AR
- Lavaca, AR
- Roland, OK
- Muldrow, OK
- Stigler, OK
Related Services
Questions
Smart Thermostat FAQs
Can I install a smart thermostat myself?
Some people do. The trouble shows up on homes without a C-wire, on heat pumps, and on multi-stage systems — wrong wiring can short-cycle the equipment or run expensive aux heat constantly. If you’re not sure what you have, a professional install is cheap insurance.
Will a smart thermostat work with my heat pump?
Yes, with the right model and correct configuration. Heat pumps need the thermostat to manage the reversing valve, defrost, and backup heat properly — we set all of that up and test it in both modes.
Which brand is best?
It depends on your system and what you want from it. We install Nest, ecobee, Honeywell, and other major brands and will tell you which fits your equipment — not which one pays us more.
Do I have to buy the thermostat from you?
No. Bring your own and we’ll install it, or we can supply one. Either way we verify it’s compatible before anything comes off the wall.
Will it really lower my bills?
For most homes, yes — mainly from not heating or cooling an empty house. How much depends on your schedule and how the old thermostat was being used. We won’t promise a number we can’t back up.
My smart thermostat keeps rebooting or losing power. Can you fix it?
Yes. That’s almost always a missing C-wire or a marginal power adapter. We fix the power problem properly instead of swapping thermostats.
Ready to Upgrade Your Thermostat?
Call and tell us what system you have. We’ll recommend the right thermostat, install it properly, and show you how to use it.
Financing available with approved credit through Synchrony.
Clark HVAC · 21196 Jake Smith Rd, Spiro, OK 74959 · 918-839-3734