Lennox HVAC Service Nationwide

Why Dallas Homeowners Choose Lennox HVAC

We’re an independent Dallas Lennox service provider, and we work on every major Lennox furnace, air conditioner, and heat pump line, from 1990s G-series workhorses to current SL28XCV inverter systems. Most Lennox calls we run in Dallas come down to one of four things: a failed inverter board on an XC25 or XC20, a plugged condensate drain from our humidity, an evaporator coil leak on a 10-15 year old XC13 or XC14, or carbon buildup on a Merit furnace ignitor. What sets our Lennox work apart is straightforward: we repair what’s repairable, we show you the part we pulled, and every repair carries a written 365-day guarantee. We’re not a Lennox dealer and we’re not authorized by Lennox, which means we make repair decisions based on what’s actually wrong with your system, not what a manufacturer program tells us to sell. Call (430) 213-5796 for a free estimate on any Lennox repair in Dallas.

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Why Trust Cold Harbour Heating and Air Dallas for Your Lennox HVAC?

Victor Mancini, our owner, learned the trade at Los Angeles Trade-Technical College and spent decades turning a wrench on everything from rooftop package units to the old-school furnaces Dallas homeowners in Oak Cliff still run. He built this company around one idea: “Tell the customer the number before the work starts. Everything else follows from that.” We carry that into every Lennox job. Our technicians have pulled apart enough EL296V furnaces and XC25 condensers to know exactly what fails on them and when. A homeowner in North Dallas doesn’t need a tech who’s “Lennox-certified” on paper. They need someone who has seen two dozen failed inverter boards on XC25 units and can tell the difference between a board problem and an actual compressor failure without replacing the wrong part. That’s the experience we bring. Every Lennox repair we do gets a written price before work starts, a written 365-day guarantee when we finish, and a phone number answered by a live person around the clock. We also service Carrier and Trane systems daily, so the technician at your door can work on whatever equipment is already in your Dallas home.

Common Lennox HVAC Problems We Fix in Dallas

Our repair logs across hundreds of Dallas Lennox systems show the same failure patterns repeating. Here are the five we see most:

• Inverter board failures on XC25 and XC20 air conditioners. The XC25 is Lennox’s flagship variable-capacity AC, and its inverter board is a known weak point after 7-10 years, especially in Dallas where the unit runs hard from June through September. The board failure often gets misdiagnosed as a full compressor replacement, which costs four times more. We test the board first, every time.
• Inducer motor and pressure switch faults on EL296V and G61MPV furnaces. These are 90%+ AFUE condensing furnaces, and their inducer motors and pressure switches fail with regularity after year eight or nine. The G61MPV in particular is prone to pressure switch hoses cracking and throwing false error codes. A hairline crack in that little rubber hose will shut the furnace down just as thoroughly as a dead motor.
• Evaporator coil leaks on 10-15 year old XC13 and XC14 systems. This is the big one in Dallas. The relentless summer heat cycle, combined with our clay soil shifting slabs and stressing refrigerant lines, means those aluminum coils eventually develop pinhole leaks. If your XC13 or XC14 is losing charge year after year, the coil is almost always the culprit.
• Ignitor and flame sensor carbon buildup on single-stage Merit furnaces. The ML180 and older Merit units run a hot surface ignitor that gets brittle after about five years, and the flame sensor collects carbon until the furnace won’t hold a flame. It’s a straightforward fix, but it shuts down heat in January when you need it most.
• Condensate drain clogs on every Lennox model line. Dallas humidity means algae and sludge build up in the drain pan and line, especially on high-efficiency furnaces and AC units that run constantly. A clogged drain trips a float switch and shuts the system down. We clear it and treat the line so it doesn’t refill in two weeks.

Lennox Parts & Our Repair-vs-Replace Approach

Here’s how we handle Lennox parts, and we’ll be straight with you about it. When longevity matters, we source genuine Lennox OEM parts: inducer motors, inverter boards, gas valves, and anything that affects combustion safety or system efficiency. For components like capacitors, contactors, and ignitors, we use high-grade aftermarket options that match or exceed OEM spec. That keeps your repair bill sensible without cutting corners on the parts that actually matter. We don’t stock every Lennox part on the truck because no honest shop can. What we do stock are the common failure items: capacitors, contactors, flame sensors, ignitors, pressure switches, and condensate components. On a 15-year-old Lennox coil leaking R-22, we’ll show you both paths: a coil replacement with a new refrigerant, or a full system replacement. We’ll give you the numbers for both and let you decide. No pressure, no lecture. If you’re not sure which direction makes sense, call (430) 213-5796 and we’ll walk you through it.

Our Lennox Service Process – Step by Step

1. 1
   Diagnosis. We test the specific Lennox component that’s failing, not the general system. On an XC25 that won’t start, that means checking the inverter board before the compressor. On an EL296V throwing a pressure switch code, that means testing the inducer motor and inspecting the hose before condemning the switch.
2. 2
   Written price. Before any tool comes out, you get the repair cost in writing. If you decide not to proceed, you owe us nothing for the diagnosis. The price doesn’t change at the door.
3. 3
   Repair or replacement. We use OEM Lennox parts where it matters and quality aftermarket parts where they’re the better value. The work is done cleanly, and we leave your mechanical closet or attic cleaner than we found it.
4. 4
   Testing. We run the system through a full cycle. On a furnace repair, that means verifying manifold gas pressure, temperature rise, and a complete heat cycle. On an AC repair, we check refrigerant pressures, temperature split, and condensate drainage.
5. 5
   Written guarantee. Every Lennox repair gets a written 365-day guarantee before we leave. If the same repair fails within a year, we come back and fix it at no charge. No argument, no fine print.

Lennox Products We Service & Install in Dallas

We work on the full Lennox residential lineup: the Dave Lennox Signature Collection (XC25 air conditioners, SLP98V furnaces), the Elite Series (EL296V and EL18XCV), the Merit Series (ML180 furnaces, ML14XC1 air conditioners), and the SL280V and SL98V Signature furnaces. We also service Lennox heat pumps across all three tiers. Our Dallas service area includes homes throughout the metro: East Dallas, Oak Cliff, North Dallas, Richardson, Plano, Garland, Mesquite, and the surrounding suburbs, plus Lennox service in Arlington. The older pier-and-beam homes in East Dallas and Oak Cliff have their own set of Lennox challenges, which we’ll get into in the FAQ. For newer two-story slab homes in Richardson and Plano, we handle the zoning and ductwork realities that come with those builds. Whether it’s a 1990s G-series furnace in an Oak Cliff bungalow or a current SL28XCV in a North Dallas custom home, we’ve worked on it.

We Also Service These Brands

We’re not a single-brand shop. Our technicians are trained on nine major residential HVAC brands, and we run AC Repair calls on Carrier and Trane systems every single day in Dallas. If you have a mixed system, a Lennox condenser on a Trane furnace, we can handle that too. Our multi-brand capability means the technician who shows up doesn’t need to be swapped out because the nameplate doesn’t match.

FAQs – Lennox HVAC Service in Dallas

Book Your Lennox Service in Dallas, TX

If your Lennox system is acting up in the Dallas heat or the occasional ice storm, call (430) 213-5796. A live person answers, day or night. We’ll schedule a firm arrival window, diagnose the problem, and hand you a written price before any work starts. Every repair carries our 365-day written guarantee. That’s how we’ve done it since 2003.

Written by Victor Mancini, Owner at Cold Harbour Heating and Air Dallas, serving Dallas since 2003.