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Smart thermostat installed on the wall of a North Louisiana home

Thermostat Installation

THERMOSTAT INSTALLATION IN NORTH LOUISIANA

Smart or programmable, we install it right — wiring, C-wire, compatibility, and full setup — so your thermostat actually controls comfort and trims the bill. Flat-rate quote before we start.

(318) 319-0220

4.9 · 3,569 reviews (2 profiles)

Verified Google reviews

24/7 emergency responseLicensed & insuredServing North Louisiana since 1997
  • 4.9★ on Google

    3,569 reviews · 2 profiles

  • 24/7 Emergency

    Call for current availability

  • Licensed & insured

    LA Master Plumber #1874

  • North Louisiana

    Ruston to Monroe

  • Flat-rate pricing

    Quoted before we start

Reviewed by Mark Johnson & Sons' LA-licensed master plumber (#1874) Last updated July 2026

Overview

A thermostat that finally works the way it should

The thermostat is the one part of your HVAC system you actually touch — and the wrong one, or one wired badly, quietly costs you comfort and money every day. Mark Johnson & Sons installs and sets up smart and programmable thermostats across North Louisiana, from a simple like-for-like swap to a full smart upgrade with a new C-wire and app setup.

The tech who shows up is on our payroll — no subcontractors — and every quote is flat-rate, given before we start. We confirm the new thermostat is compatible with your exact furnace, heat pump, or AC before we install it, run the common wire if the unit needs one, and don't leave until it's mounted level, talking to your system, and set up the way you want it. The service call is waived when you have us do the install.

What we install

  • Smart thermostats — Nest, ecobee, Honeywell, and Emerson Sensi, paired to your wifi and phone
  • Programmable thermostats — 7-day and 5-1-1 schedules for simple, reliable savings
  • Heat-pump and multi-stage models — correct staging so auxiliary heat only runs when it should
  • Multi-zone controls — a thermostat per zone with damper coordination for room-to-room comfort

Why the install matters more than the box

A smart thermostat left on a bad schedule, or wired without a C-wire, doesn't save a dime — it just drops offline and frustrates you. Many older North Louisiana homes were wired before smart thermostats existed and have no common wire at the wall. We check for it first, run one if it's missing, verify heat-pump staging so your emergency strips aren't running all winter, and build the schedule around how your household actually lives. Placement matters too: a thermostat mounted over a supply vent, in direct sun, or on an exterior wall reads the wrong temperature and runs your system against a number that isn't real. If yours is in a bad spot, we'll tell you and relocate it to a wall that senses the room honestly.

Buy your own or let us match one

Bought your own smart thermostat? Great — we'll install and configure it. Want a recommendation? We'll match it to your equipment and how you use the house, so you get the comfort and the savings without the guesswork.

Ask about our service savings agreement plans — pairing a thermostat upgrade with a seasonal tune-up gets you the member's 15% off and priority scheduling, an easy way to knock it out on one visit.

Licensed Louisiana contractorOwn trucks, own crewsFlat-rate, quoted upfront

Free quote

Flat-rate thermostat quote

Tell us your system — furnace, heat pump, or AC — and the thermostat you have in mind. We'll confirm compatibility and give you a real number before we start.

Or call now — (318) 319-0220

4.9★

Google

24/7

Emergency

Free

Quote

Current coupons

View all
  • $89 OFF

    Waived diagnostic with any thermostat install

    Service call credited back when you approve the install.

    Expires 12/31/2026

  • 15% OFF

    Install with service savings agreement

    Memberships start at $189/year. Discount applies to HVAC & plumbing work.

    Expires 12/31/2026

  • FREE C-WIRE

    Common-wire add with a smart thermostat install

    With qualifying smart thermostat install. Must mention at booking.

    Expires 12/31/2026

Mention coupon when booking. One offer per household.

Warning signs

Signs It's Time for a New Thermostat

A thermostat doesn't have to be broken to be costing you. Any of these is a good reason to upgrade.

  • The temperature reading never matches how the room actually feels

  • The system short-cycles or won't hold a steady temperature

  • You have an old manual or dial thermostat with no scheduling

  • A smart thermostat you bought won't power on or keeps losing its wifi

  • Blank screen or dead display, even after new batteries

  • You can't control comfort room-to-room or from your phone

  • Auxiliary or emergency heat kicks on when it shouldn't (heat pump)

  • You just want lower bills without babysitting the thermostat all day

Homeowner adjusting a newly installed smart thermostat in a North Louisiana home

Comfort & savings

The smallest upgrade with the biggest daily payoff.

A smart thermostat installed and set up correctly learns your schedule, backs off when you're out, and keeps the humid summers and cool snaps in check — comfort you feel and savings you see on the bill.

(318) 319-0220

Typical bill savings

10%+

Across Ruston, Monroe, West Monroe, and North Louisiana.

The Process

How a Thermostat Install Goes

Mark Johnson & Sons technician wiring a new smart thermostat in a North Louisiana home

On the truck

Professional tools, parts, and diagnostics — every call.

  1. Compatibility check

    We confirm the thermostat you want works with your exact furnace, heat pump, or AC — and whether it needs a C-wire — before anything comes off the wall.

  2. Flat-rate quote

    You get one price covering the install, any C-wire run, and full setup. If a wiring add is needed, you see it before we start — no surprises.

  3. Wiring & mounting

    We safely disconnect the old unit, run or add the common wire if the thermostat needs steady power, and mount the new one level on the wall.

  4. Setup & app pairing

    We connect it to your system, pair a smart unit to your wifi and phone app, build your schedule, and set the modes and temperatures the way your household lives.

  5. Test & walkthrough

    We run heat and cool to confirm it's controlling the system correctly, then show you how to use the schedule, app, and away features before we go.

Pricing

How We Price Thermostat Installation

Flat-rate, quoted before we start. Service members get 15% off. Price depends on the thermostat and whether your system needs a C-wire.

Service members save 15%Service Savings Agreement Plans · from $189/yr

Flat rate, quoted before we start

You get the full price for the job up front — not an hourly meter you watch climb. You approve it before a tool comes out of the truck.

The quote is the price

It doesn't move once work begins. If something unexpected turns up behind a wall or under a slab, we stop and talk it through with you before going further.

Service members save 15% on every repair

Service savings agreements start at $189 a year and take 15% off all plumbing, heating, and cooling repairs, with priority scheduling on every call. The Premium Service Savings Agreement Plan adds same-day service and drops after-hours charges entirely.

Financing available

Bigger jobs — a system replacement, a repipe, a sewer line — can be financed through GoodLeap. Apply online in a few minutes.

Every job is priced for your home and what it actually needs — tell us what's going on and we'll get you a firm number, free and with no obligation.

Service Savings Agreement Plans

Two plans. Whole-home peace of mind.

From $189 a year, service members get 15% off every plumbing, heating, and cooling repair, two complete HVAC tune-ups, a free plumbing and drain check-up, and priority scheduling on every call.

  • 15% off repairs
  • Priority scheduling
  • 2 HVAC tune-ups/yr
  • After-hours discounts
  • $25 savings certificate
  • Guaranteed flat-rate

Service Savings Agreement Plan

$189/year

Everything it takes to keep the house maintained and your repairs discounted.

Each additional HVAC unit is $89/year

Most complete

Premium Service Savings Agreement Plan

$389/year

Everything in the Service Savings Agreement Plan, plus no after-hours charges, no travel fees, and same-day service.

Each additional HVAC unit is $89/year

Questions? (318) 319-0220

1-year term · does not auto-renew

Compare

Standard vs. Programmable vs. Smart Thermostat

Three levels of thermostat, three levels of savings and control. The right one depends on how hands-on you want to be and how much you want off the bill.

FeatureStandard (manual)ProgrammableSmart (wifi)
SchedulingNone — set by hand7-day / 5-1-1 scheduleLearns your routine, auto-adjusts
Phone / app controlNoNoYes — control from anywhere
Typical bill savingsBaselineModest with a good scheduleAround 10% when set up right
Needs a C-wireNoUsually notYes (we add one if missing)
Best forRentals, simple set-and-forgetSteady routines, budget upgradeLower bills, remote control, LA humidity

FAQ

Thermostat Installation FAQs

Can you install a smart thermostat I already bought?

Yes. Bring your Nest, ecobee, Honeywell, or any other smart thermostat and we'll confirm it's compatible with your system, install it, run a C-wire if it needs one, and set up the app and schedule. If it turns out it won't work with your equipment, we'll tell you before we start and suggest one that will.

What is a C-wire and does my system need one?

The C-wire, or common wire, gives a smart thermostat the steady power it needs to run its screen and wifi. Many older North Louisiana homes were wired before smart thermostats existed and don't have one at the thermostat. We check for it first and, if it's missing, run one as part of the install so your thermostat works reliably instead of dropping offline.

Will a smart thermostat actually lower my bills?

For most homes, yes — a properly set-up smart thermostat can trim around 10% off heating and cooling by easing back when you're asleep or away and running smarter cycles. The key word is set up: a smart thermostat left on a bad schedule doesn't save anything, which is why we build the schedule with you before we leave.

How much does thermostat installation cost in North Louisiana?

A standard programmable swap is the cheapest option, and a smart thermostat install with wifi and app setup costs more. If your home needs a C-wire added, that's an extra line item, and multi-zone setups run higher. You get one flat-rate number covering the install and full setup before we start.

Do you work with Nest, ecobee, and Honeywell?

Yes, all the major brands — Nest, ecobee, Honeywell, Emerson Sensi, and standard programmable models. We'll install whichever you prefer, or recommend one matched to your furnace, heat pump, or AC and how your household uses the house.

What's the difference between programmable and smart?

A programmable thermostat follows a fixed schedule you set — it's a solid, budget-friendly upgrade from a manual dial. A smart thermostat adds wifi and phone control, learns your routine, adjusts automatically, and reports usage. If you want the lowest bills and remote control, especially through our humid summers, smart is worth the extra cost; if you just want a reliable schedule, programmable does the job.

Can one thermostat control different rooms?

A single thermostat controls one zone. If you want independent control of, say, upstairs and downstairs, that's a multi-zone setup with a thermostat per zone and zone dampers in the ductwork. We can quote adding zoning if room-to-room comfort is the goal.

Do I need a special thermostat for a heat pump?

Yes — heat pumps need a thermostat that supports heat-pump staging and controls the auxiliary (emergency) heat correctly. The wrong thermostat, or one wired wrong, can run your electric strips far more than needed and spike your winter bills. We set the staging up properly so aux heat only kicks in when the heat pump genuinely needs backup.

How long does a thermostat install take?

A straightforward like-for-like swap is usually under an hour. Adding a C-wire, setting up a smart thermostat with app pairing and a custom schedule, or configuring multi-zone control takes longer. We book enough time to finish the wiring, mounting, setup, and a full test in one visit.

Do you install thermostats during a maintenance visit?

We can. Our $189/year Service Savings Agreement Plan includes a Spring AC and Fall heating tune-up plus an annual plumbing check-up, and service members get 15% off repairs and priority scheduling — so pairing a thermostat upgrade with a seasonal tune-up is an easy, discounted way to knock it out.

Available Around the Clock

Emergency?
We answer 24/7.

Burst pipe, water heater out, sewer backup? Real plumbers pick up — no answering machines. Mark Johnson & Sons Plumbing serves North Louisiana any time, day or night.

(318) 319-0220

LA Master Plumbing #1874 · Backflow Cert #28131 · Master Natural Gas Fitter #LMNGF9062 · State Contractors #35794

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