Furnace & Heating Maintenance
FURNACE & HEATING MAINTENANCE
A yearly tune-up that catches the small stuff before it becomes a no-heat night — safer operation, lower bills, longer system life.
4.9 · 4,400+ reviews
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4.9★ on Google
4,400+ reviews
24/7 Emergency
60–90 min dispatch
Licensed & insured
LA Master Plumber #1874
North Louisiana
Ruston to Shreveport
Flat-rate pricing
Quoted before we start
Overview
The Cheapest Repair Is the One You Prevent
Most no-heat emergencies don't come out of nowhere — they're small problems that went unnoticed until the first hard freeze. A yearly furnace tune-up from Mark Johnson & Sons catches them early: a weak igniter, a dirty flame sensor, a cracked heat exchanger, a blower drawing too many amps, or airflow choked by a clogged filter. We've serviced heating systems across Ruston, Monroe, West Monroe, Shreveport, and Bossier City since 1997, on every major brand — Carrier, Trane, Lennox, Goodman, Rheem, York, and more.
Our Fall heating tune-up is a full safety and performance check, not a quick glance. It keeps your family safe from carbon monoxide, keeps your bills down, and keeps your manufacturer's warranty valid — many require documented annual service, and the paperwork matters if you ever file a claim. Spend a little in October and you're far less likely to spend a lot on a no-heat night in January.
What our Fall heating tune-up covers
- Heat exchanger inspection for cracks and corrosion — the #1 carbon-monoxide risk
- Manifold gas pressure checked and adjusted to spec
- Flame sensor cleaned and microamp signal verified for reliable ignition
- Igniter and burners tested for a clean, steady blue flame
- Blower motor amp draw and capacitor measured against rated values
- Safety controls — limit switches, pressure switches, and flame rollout
- Thermostat calibration, wiring, and filter checked and replaced as needed
Why annual service matters in North Louisiana
Our furnaces sit idle most of the year, then get leaned on hard during a few sudden hard freezes — exactly when a marginal igniter or a sticky gas valve picks to fail. A tune-up finds those parts on a 60-degree afternoon instead of a 25-degree night. It also protects your wallet: a dirty filter, a weak flame, or a blower pulling too many amps all make the furnace work harder for the same heat, and even a few points of lost efficiency add up over a season.
One visit, or fold it into the plan
You can book a one-time tune-up, or make it automatic with our service savings agreement plans. For $189/year, Service members on the Service Savings Agreement Plan get this Fall heating tune-up plus a Spring AC tune-up and an annual plumbing and drain check-up, 15% off any repair, front-of-line scheduling, and an after-hours discount. Two seasonal tune-ups usually cost more bought separately — and we own the schedule so you never have to remember.
Free quote
Book your heating tune-up
Tell us your system type and we'll get you scheduled — or ask about the service savings agreement and let us keep both HVAC tune-ups on autopilot.
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Single furnace tune-up
New maintenance customers. One per household.
Expires 12/31/2026
$189/YR
Service Savings Agreement Plan — 2 HVAC tune-ups + plumbing check
+$89 per additional HVAC unit. No auto-renew.
Expires 12/31/2026
15% OFF
Any repair found during your tune-up
Requires active service savings agreement.
Expires 12/31/2026
Mention coupon when booking. One offer per household.
Warning signs
Why an annual tune-up pays off
Regular maintenance protects three things that cost real money: your safety, your bills, and your equipment.
Prevents the mid-winter no-heat emergency before it starts
Catches cracked heat exchangers and carbon-monoxide risks
Keeps the system running at its rated efficiency — lower bills
Extends furnace life and defers an expensive replacement
Keeps your manufacturer's warranty valid (most require it)
Restores airflow and even heating across the whole home
Verifies safe gas pressure and clean, complete combustion
Spots a weak igniter or capacitor before it strands you
Service savings agreement
Two HVAC tune-ups a year, handled for you.
For $189/year, Service members on the Service Savings Agreement Plan get a Fall heating tune-up, a Spring AC tune-up, and an annual plumbing check-up — plus 15% off repairs and priority scheduling. We own the schedule so you don't have to.
Service savings agreement
From $189/yr
Across Ruston, Monroe, Shreveport, Bossier City, and North Louisiana.
The Process
What's in our heating tune-up
On the truck
Professional tools, parts, and diagnostics — every call.
Filter & airflow check
We inspect and replace the filter (customer-supplied or purchased) and confirm airflow isn't choking the system.
Safety inspection
Heat exchanger, gas pressure, and all safety controls checked — the checks that protect your family from CO.
Ignition & burner service
We test the igniter and flame sensor, verify a clean steady flame, and correct a rough start before it strands you.
Electrical & blower check
Thermostat operation, wiring, blower motor amp draw, and capacitor tested and cleaned as needed.
Full-cycle verification
We run the complete heat cycle, confirm proper operation, and flag anything worth watching — with photos and honest options.
Pricing
How We Price Heating Maintenance
One-time tune-up, or fold it into the service savings agreement and get two HVAC tune-ups plus a plumbing check-up for one flat annual price. Service members also get 15% off any repair.
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
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
FAQ
Furnace & Heating Maintenance FAQs
Once a year, ideally in the fall before you rely on it. Annual service keeps the system safe and efficient and satisfies the maintenance requirement in most manufacturer warranties. Service savings agreement builds the Fall tune-up right into your plan.
Related services
Related heating services
What a tune-up connects to when it turns something up.
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.
LA Master Plumbing #1874 · Backflow Cert #28131 · Master Natural Gas Fitter #LMNGF9062 · State Contractors #35794