Thermostat Replacement & Repair

S&S HVAC of Louisiana is the go-to local company for your thermostat installation or repair.

Book Your Thermostat Services In Louisiana

Looking for professional thermostat services in Southwest Louisiana - around Lake Charles? Book now to get the service you deserve.
  • Expert thermostat diagnostics, repair and replacement
  • Honest recommendations and upfront pricing
  • Fast, friendly local service backed by our satisfaction guarantee
  • Parts and labor warranties included on all new installations
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Our Thermostat Services

Smart Comfort Starts at the Wall — Not the AC Unit

If your home is too hot, too cold, or your HVAC just doesn’t listen when you make changes — the problem might be your thermostat. At S&S HVAC, we install, repair, and replace all types of thermostats across Lake Charles, Moss Bluff, Sulphur, and surrounding Louisiana towns.

Whether you want to upgrade to a smart thermostat or just need to get the AC responding again, we’ve got you covered.
Thermostat Repair
If your thermostat is:
  • Not turning on your HVAC system
  • Displaying inaccurate temperatures
  • Unresponsive or frozen
  • Short-cycling your system
  • Suddenly spiking your energy bills
…you probably don’t need a full HVAC overhaul. Our techs can diagnose and repair thermostat issues quickly, saving you from an unnecessary replacement.
Thermostat Replacement
We replace manual, programmable, and older digital thermostats with newer models — including Wi-Fi and smart thermostats from Nest, Ecobee, Honeywell, and more.

Time for an upgrade? Replacing an old, outdated thermostat can:
  • Improve temperature accuracy
  • Lower energy bills
  • Unlock advanced scheduling features
  • Sync with smart home systems
  • Give you remote control from your phone
Thermostat Installation (New Installs & Remodels)
Building a new home or adding a second zone? We install thermostats and zoning systems for:
  • New HVAC installs
  • Dual-zone or multi-system homes
  • Garage conversions or additions
  • Commercial offices and storefronts

Other HVAC Companies Try - We Do It Right

Locally Owned & Operated
We’re proud to call Lake Charles in Southwest Louisiana home. As your neighbors, we treat your comfort like our own and back every job with pride.
Quality Workmanship
Our certified HVAC technicians are trained in the latest thermostat systems and only use trusted parts from top manufacturers.
Fully Licensed & Insured
You’re in safe hands. We’re fully licensed and insured to protect our customers and our crew on every job.
No Gimmicks, Just Results
We offer competitive rates with no hidden fees—and we’ll never upsell you on services you don’t need.
What Our Amazing Customers Are Saying About Our Team

Serving Residential & Commercial Properties in Southwest Louisiana

We proudly serve homes and businesses across:

  • Lake Charles
  • Sulphur
  • Moss Bluff
  • Westlake
  • Iowa
  • Mossville
  • South Sulphur
  • DeQuincy

Smart Thermostats We Install

We’re pros at setting up the industry’s top Wi-Fi and learning thermostats:
  • Nest Learning Thermostat
  • Ecobee Smart Thermostat
  • Honeywell T-Series
  • Emerson Sensi
  • Lux Smart
  • Carrier/Bryant branded models
  • Google Nest Smart Thermostat
  • All additional brands and models

Common Thermostat Replacement Scenarios

  • Upgrading from a manual dial to a programmable model
  • Replacing a faulty thermostat that no longer signals the HVAC
  • Swapping to a Wi-Fi thermostat for remote access
  • Fixing an incorrectly installed or miswired unit
  • Installing a thermostat in a new zone after a home remodel

Frequently Asked Thermostat Questions

Can’t find the answer you’re looking for? Reach out to our team today for fast answers.

How much does it cost to replace a thermostat?
Basic replacements start around $150–$300 for standard models. Smart thermostat installs can range from $300–$600, depending on wiring and features.
Can I install a smart thermostat myself?
Sometimes — but if your system uses older wiring, multi-stage HVAC, or you’re unsure about voltage types, we strongly recommend professional installation to avoid damage.
How do I know if my thermostat is bad?
If your system isn’t turning on/off correctly, the display is blank or inaccurate, or temperatures feel way off — the thermostat is likely the culprit.
What’s the best thermostat for Louisiana homes?
We recommend smart models like Nest or Ecobee to track usage and adapt to our hot, humid summers. They’re perfect for optimizing energy use during peak AC months.
Do smart thermostats really save money?
Yes. Most homeowners see a 10%–20% reduction in heating/cooling costs with smart scheduling and usage tracking.
Do you work with older HVAC systems?
We do. We’ll verify compatibility and install an adapter or C-wire if needed. We’ve integrated smart thermostats into systems over 20 years old.
Will a new thermostat fix my uneven temperatures?
Not directly — but we can install zoning systems or multi-thermostat setups to fix those issues. A faulty or mislocated thermostat can also contribute to uneven cooling.
Can you install a thermostat without a C-wire?
Yes — many newer thermostats (including Nest and Ecobee) offer C-wire adapters or power extenders that let us install them in homes without existing C-wires. Our techs will check compatibility and ensure your system is wired safely and correctly.
How long does it take to install a new thermostat?
Most thermostat installations take under an hour, including setup, testing, and app walkthroughs (if it's a smart model). If wiring updates or troubleshooting are needed, it may take a bit longer — but we always provide an accurate time estimate upfront.
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