Lennox Furnace Repair Nationwide

Lennox Furnace Repair in San Antonio: What to Know First

We repair Lennox furnaces across San Antonio, usually with same-day or next-day service, and most jobs land between $150 and $700 before any parts are ordered. You get a written price before the first tool comes off the truck, and every repair carries our 365-Day Done Right Promise. If you own a Lennox furnace and it’s blowing cold air, cycling oddly, or making a sound it never made before, this page gives you the specifics you won’t find in the owner’s manual.

Call (254) 271-2545

Call us at (254) 271-2545 and a live person answers, day or night. No voicemail queue, no “please hold for the next available representative.”

Key Takeaways:

• Independent Lennox furnace repair in San Antonio, typically $150 – $700 for most repairs.
• Written price before work starts, every visit.
• Same-day and next-day scheduling for no-heat calls during San Antonio’s winter cold snaps.
• 365-Day Done Right Promise backs every job.
• We service the full Lennox product line, from Elite to Merit to Dave Lennox Signature Collection.

How Lennox Products Fail – and How We Fix Them

Lennox builds solid equipment, but after a decade or two of San Antonio winters, specific components wear in specific ways. Here’s what we see most often, by series where it applies.

• Ignitor failure on Merit Series (ML193, ML195). The silicon nitride ignitors on these entry-level furnaces get brittle after 5 to 8 years. The symptom is a furnace that hums, the inducer motor spins up, but no flame ever comes. A lot of companies throw parts at this. We check the ignitor resistance first, because on the ML195 specifically, a cracked ignitor can also take out the control board if it shorts. We replace with OEM Lennox ignitors when warranty coverage applies, and quality aftermarket when the furnace is out of warranty and the customer prefers the lower cost.
• Pressure switch nuisance trips on Elite Series (EL296, EL297). The Elite line’s two-stage gas valve needs steady combustion air. In San Antonio homes with tight building envelopes or partially blocked venting from our wet springs, the pressure switch opens and the furnace shuts down mid-cycle. Homeowners describe it as “the heat just cuts out.” We test the tubing, the port, and the switch itself before condemning anything, because on the EL296 a cracked collector box gasket mimics this exact symptom. A $28 gasket beats a $340 switch replacement.
• Heat exchanger stress cracks on older two-stage models (G60, G61). The G-series is a workhorse, but after 12 to 15 years, the secondary heat exchanger on two-stage versions can develop hairline cracks where condensation pools during short winter cycles. We see this more in San Antonio than in colder markets, because our furnaces idle through mild weather and then run hard during January cold snaps, and that thermal cycling is harder on metal than steady operation. We always camera-scope the exchanger before recommending repair versus replace, and we will never tell you to replace a furnace when a $200 repair is the honest answer.
• Blower motor capacitor fatigue across all series. This isn’t Lennox-specific, but it’s the single most common repair we make on Lennox furnaces in San Antonio. The symptom is a furnace that turns on, the burners light, but the blower spins slowly or not at all, and you hear a hum. A Lennox ECM blower motor with a failed capacitor can eventually take out the entire motor module, which is a $900+ part. We replace capacitors on the spot for under $200 in most cases.
• Limit switch lockout on Dave Lennox Signature Collection (SLP98, SLP99). These high-efficiency modulating furnaces are smart, but their safety logic is conservative. A slightly dirty filter or a partially closed supply vent can trip the limit switch and lock out the furnace. The real fix isn’t just resetting the board, it’s measuring static pressure and checking register balance in the house. We carry the replacement limits for SLP98 units on the truck and can typically clear the lockout and restore heat the same visit.

Our Lennox Furnace Repair Process

Here’s what a Lennox repair call actually looks like when Meadowsweet Heating and Air San Antonio comes out. You’ll know the sequence before we arrive, so nothing about the visit is a surprise.

1. 1
   You call, a person answers. We ask what the furnace is doing, how long it’s been doing it, and whether it’s the only heating source for the house. If there are kids home or a dog in the yard, we note it.
2. 2
   We show up wearing shoe covers and carrying drop cloths. We ask before moving anything, and we’ll lay protection down in the path from the front door to the furnace closet. Pets stay safe, floors stay clean.
3. 3
   Diagnostic, written, in front of you. We test voltage, check the ignition sequence, inspect the heat exchanger, and measure gas pressure. Then we write the price for the exact repair on paper, before any work starts. You approve it, we start. You don’t approve it, we leave, and you owe only the diagnostic fee you agreed to when you booked.
4. 4
   Parts and repair. We use OEM Lennox parts when your furnace is under warranty or when the part is safety-critical like the gas valve or limit switch. For out-of-warranty furnaces, we’ll quote both OEM and quality aftermarket options with honest trade-offs, and you choose.
5. 5
   We test the full sequence. We run the furnace through three complete heating cycles, verify flame signal, check rollout, and confirm the blower is moving the right CFM for your ductwork.
6. 6
   Cleanup and documentation. We walk the path with you, show you the job, and send a photo of the cleaned work area before we leave. The repair is covered by our 365-Day Done Right Promise.

What Lennox Furnace Repair Costs in San Antonio

Most Lennox furnace repairs in San Antonio run between $150 and $700, including the diagnostic and labor. The specific cost depends on which part failed and whether your furnace is still under Lennox’s factory warranty. Here are the typical scenarios we quote.

What moves the price: whether the part is under Lennox factory warranty, which series you own (an SLP98 modulating gas valve costs more to replace than an ML193 single-stage valve), and how long the repair takes given the furnace’s location in the home. We give you the exact number before we turn a screw, and the estimate is free for any repair we quote. Call (254) 271-2545 to schedule.

Why San Antonio Homeowners Call Meadowsweet Heating and Air San Antonio for Lennox Work

Because we treat Lennox furnaces as their own discipline, not as another box with a flame in it. Luis Serrano grew up in East Los Angeles and learned the trade at Los Angeles Trade-Technical College, then spent decades working on HVAC systems across the Southwest. He taught the crew here in San Antonio to treat every Lennox job like a puzzle with a specific answer. “Tell me what the house is doing, and I will tell you what it needs – no guesswork, no upsell.”

We’re an independent Lennox service provider, which means we’re not bound to any manufacturer’s sales targets or replacement quotas. If your G61 needs a $200 capacitor, we’ll tell you it needs a $200 capacitor. We also work on the other brands our customers own most in San Antonio, Carrier and Trane included, so if you have a mixed system or you’re considering a mid-life replacement, we can quote you honest numbers across lines.

Every visit includes the Cedarwell Care Promise: a written price before any work starts, shoe covers and drop cloths on every job, and a photo of the cleaned work area before we leave. Our technicians are background-checked and uniformed, and they follow the C.A.R.E. values code: Clean up like it’s their own home, Ask before moving anything, Respect the family’s time and quiet hours, Explain the price before the work. If a repair isn’t done right within the first year, we make it right. No runarounds, no fine print.

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