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Get your free estimateLennox Furnace Repair in Fort Lauderdale: What to Know First
Lennox furnace repair in Fort Lauderdale typically runs $150 – $700 depending on the part that failed, and most jobs are completed same-day or next-day. We’re an independent Lennox service provider, not a factory-authorized dealer, which means we diagnose honestly and repair without pushing you toward a replacement you don’t need. If you’re a Fort Lauderdale homeowner with a Lennox furnace that won’t ignite, short-cycles, or blows cold air, call (754) 354-7289. A live person answers, and you’ll get a written price before any tool comes out.
How Lennox Products Fail – and How We Fix Them
Lennox builds a solid furnace, but after a decade of Fort Lauderdale humidity and salt air, certain parts give up before others. Here’s what we actually see on service calls in this market:
- Ignitor failure on Lennox Elite and Merit series: The silicon nitride ignitor on older Elite and Merit furnaces gets brittle after years of heat cycling. In Fort Lauderdale’s damp air, a tiny crack absorbs moisture and the ignitor won’t glow hot enough to light the gas. We test resistance before condemning it, because sometimes the problem is the wiring harness, not the part. Typical fix: $150 – $280 parts and labor.
- Pressure switch faults on G61 and G61V models from coastal homes: Salt air corrodes the port where the rubber hose connects to the inducer housing. The switch reads a pressure error and the furnace locks out, but the switch itself is often fine. We clean or replace the port barb and the hose first, which saves you a $200 part you didn’t need.
- Inducer motor bearing noise on SLP98V modulating furnaces: The variable-speed inducer on high-efficiency SLP98V units runs almost constantly in modulating mode. When the bearings start to go, you’ll hear a growl or a squeal that changes pitch. We replace the inducer assembly as a unit, because a failed inducer means no combustion draft, and no draft means the furnace won’t run safely. The part isn’t cheap, but a good one will outlast the rest of the furnace.
- Flame sensor buildup unique to South Florida gas systems: Fort Lauderdale’s gas supply carries trace sulfur compounds that leave a white film on flame sensors faster than in drier climates. A dirty flame sensor makes the burner light, then shut off after three seconds. On Lennox ML195 and EL296 units, we clean the sensor with a non-abrasive pad as part of a standard repair visit, and we’ll tell you whether it’s a clean-and-go or a replace.
- Heat exchanger corrosion on older G50 and G40 units near the water: Fort Lauderdale’s coastal moisture accelerates rust on steel heat exchangers in pre-2010 Lennox furnaces. Hairline cracks at the crimp joints are a carbon monoxide risk, not a “run it one more season” situation. If we can, we replace under the remaining heat exchanger warranty. If not, we’ll show you the crack with a scope and give you an honest repair-or-replace conversation.
Styles & brands we work with
Our Lennox Furnace Repair Process
When you call us about a Lennox furnace that’s acting up, here’s exactly what happens:
- 1
You talk to a live person. Day or night, someone at Cold Harbour Heating and Air Fort Lauderdale answers the phone. No menu trees, no callbacks at 9 a.m. Tell us what the furnace is doing, and we’ll give you a real arrival window.
- 2
We show up, diagnose, and explain. The technician opens the furnace, checks the sequence of operation, and finds the actual failed part. Before anything else, you get a written price. No tools come out until you’ve seen the number.
- 3
Parts decision, up front. If the furnace needs a part, we tell you whether we’re using a Lennox OEM part or a quality aftermarket equivalent, and why it matters for your specific model. For warranty-sensitive repairs, we default to OEM. For older units, aftermarket often makes more sense, and the price reflects that.
- 4
The repair itself. We do the work, test the full cycle at least three times, and check gas pressure, airflow, and safety switches before we call it done.
- 5
The written guarantee. Every repair leaves with a written 365-Day Done Right Promise. If the same repair fails within a year, we come back and fix it at no charge. Not a verbal promise. On paper, handed to you.
- 6
Cleanup. We leave the furnace closet or utility room cleaner than we found it. That’s part of how we operate, not an upgrade you pay for.
See the difference
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AfterWhat Lennox Furnace Repair Costs in Fort Lauderdale
Most Lennox furnace repairs in Fort Lauderdale fall between $150 and $700, parts and labor included. The spread depends on the component and your specific Lennox model, and we price the whole job before any work begins.
- Ignitor replacement: $150 – $280
- Flame sensor cleaning or replacement: $80 – $190
- Pressure switch or hose repair: $120 – $310
- Gas valve replacement: $350 – $650
- Inducer motor or blower motor replacement: $400 – $700
- Heat exchanger diagnosis (repair or replacement priced after inspection): $90 dispatch fee, applied to the repair
What moves the price is the part, the Lennox series you own, and whether it’s under manufacturer warranty. We don’t add overtime charges for evenings or weekends, and the estimate is free. Call (754) 354-7289 for an exact number on your furnace.
Why Fort Lauderdale Homeowners Call Cold Harbour Heating and Air Fort Lauderdale for Lennox Work
Victor Mancini and our technicians see more Lennox furnaces in a month than most Fort Lauderdale contractors see in a year. We know the G61 pressure switch quirk, the SL280 flame sensor sensitivity, and when a heat exchanger is a repair versus a liability. We also carry common Lennox parts on the truck, so we’re not making you wait two days for a ground shipment from Texas.
Beyond the brand knowledge, we operate on The Kingswell Way, which means five things, in writing: the price before the work, the arrival window we honor, a clean job site, a written guarantee on every repair, and a free return visit if that repair fails inside 365 days. If your Lennox is truly done, we’ll tell you straight. If a Carrier or Trane unit starts acting up down the road, we’re trained on those too. One phone call covers whatever’s in your utility closet.
FAQs
Yes, in most cases. We keep common Lennox parts like ignitors, flame sensors, pressure switches, and limit switches stocked on our trucks, and we run same-day appointments throughout Fort Lauderdale, including weekends and holiday mornings. If your furnace needs a less common part like a modulating gas valve or a variable-speed inducer, we’ll give you a firm arrival window for the follow-up visit and a written price before ordering anything. Call (754) 354-7289 and tell us what the furnace is doing; we’ll tell you how fast we can get there.
No. Under federal and Florida law, an independent service provider performing warranty-covered repair does not void your Lennox manufacturer warranty, provided the work is done correctly and with appropriate parts. We use Lennox OEM parts when the warranty is active or when the part’s reliability profile demands it. The repair itself is covered by our 365-Day Done Right Promise, in writing, regardless of what Lennox’s warranty does or doesn’t pay.
In Fort Lauderdale homes, that’s usually one of three things: a failed ignitor, a dirty or cracked flame sensor, or a gas valve that’s stuck shut. On Lennox Merit and Elite series units, the ignitor is the most common culprit, especially if the furnace is eight years old or more. We diagnose the exact failure before recommending anything, and the repair is typically $150 – $650. If the furnace is blowing cold air because the heat exchanger has failed, we’ll show you the scope image and talk honestly about repair versus replacement.
If the repair is under $700 and the heat exchanger is intact, repair is almost always the right call, even on a furnace that’s 15 years old. A well-maintained Lennox can run 18 to 22 years in Fort Lauderdale’s mild winter climate, since it only runs hard for a few months each year. Replacement makes sense when the heat exchanger is cracked and the unit is out of warranty, or when you’re looking at a second major repair in the same season. We’ll give you both numbers, in writing, and let you decide without pressure.
For common Lennox parts, we already have them on the truck. For model-specific components on SLP98V, EL296V, or ML193 units, our South Florida parts suppliers typically stock them locally or can overnight them from Lennox’s regional distribution center. That usually means a one-day turnaround. Every repair is scheduled with a written arrival window, and the price of the part is confirmed with you before we order it. Call (754) 354-7289 and we’ll check part availability for your model while you’re on the phone.
Written by Victor Mancini, Owner & Lead HVAC Technician, Cold Harbour Heating and Air Fort Lauderdale at Cold Harbour Heating and Air Fort Lauderdale, serving Fort Lauderdale and nearby areas.