Lennox Furnace Repair Nationwide | Dalton Heating & Air Miami

Lennox Furnace Repair in Miami: What to Know First

Lennox furnace repair in Miami typically runs $175 – $825, and most calls are completed same-day because we stock the common failure parts on our trucks. You don’t pay for the part twice, and you don’t pay for a second trip. The price is in writing before we open a panel, and the repair carries a full-year written guarantee. If you own a Lennox furnace that’s acting up, call (850) 754-6042 and we’ll walk through what it’s doing right now.

Call (850) 754-6042

This page is for Miami homeowners with a Lennox gas furnace or dual-fuel system who want straight answers on what breaks, what it costs, and who’s showing up. We’re an independent Lennox service provider, not a factory dealer. We’re Dalton Heating & Air Miami, and Marco Benitez runs the crew.

How Lennox Products Fail – and How We Fix Them

• G26 and G32 series pressure switch trips. These mid-90s to early-2000s Lennox units use a single-stage inducer that collects condensation inside the collector box. In Miami’s humidity, the small drain port inside the box clogs with sediment and the pressure switch sees a false reading. The furnace refuses to fire, and the board flashes a code that most homeowners misread as a bad switch. We clean the collector box, clear the port, and test the switch before replacing anything. Nine times out of ten the switch is fine.
• EL296V and SLP98V control board failures after low-voltage surges. Miami’s summer thunderstorms knock out power constantly. These variable-speed Lennox lines have control boards that don’t tolerate surges well, even on a surge protector. The board will run the inducer but refuse to open the gas valve, or it’ll lock out entirely. We check line voltage and board power inputs first, then verify the gas valve is actually receiving signal before condemning anything. A cheap multimeter and a methodical sequence keeps you from paying for a board you don’t need.
• ML180 and EL180 ignitor failures from short cycling. The silicon nitride ignitors on these single-stage Lennox furnaces crack when the unit short-cycles repeatedly. Short cycling happens when a filter hasn’t been changed and the high-limit switch keeps cutting the burner. Homeowners replace the filter but the ignitor is already fractured. We check the high-limit switch history and run a full cycle test before fitting the new ignitor, so the replacement doesn’t die in the same spot.
• G43 and G51 series gas valve sticking in Miami’s humid crawlspaces and attics. These older Lennox units sit in unconditioned attics or crawlspaces where summer humidity hovers above 70%. The gas valve internals corrode over time, and the valve either won’t open or opens slow. We confirm with a manometer that manifold pressure is correct, then recommend whether the valve itself needs replacement or just the solenoid connections cleaned. We don’t throw a gas valve at a problem without measuring pressure.
• HC16 and Healthy Climate filter cabinet bypasses causing high-limit trips. Lennox’s media filter cabinets seal poorly if the door gasket goes flat, which happens after a few years in a hot attic. Air bypasses the filter, dirt coats the blower wheel and evaporator, and the furnace starts tripping on high limit. Homeowners think it’s a furnace problem. We pull the blower housing, check static pressure across the filter, and reseal the cabinet before resetting the system. If the blower wheel is caked, we clean it. This one fix stops the random lockouts for good.

Our Lennox Furnace Repair Process

Here’s what a Lennox furnace repair with Dalton Heating & Air Miami actually looks like from your first call to the end of the job:

1. 1
   You call (850) 754-6042. A live person answers, day or night. You describe the symptom, we schedule a window, and we text you the technician’s name and photo before he arrives.
2. 2
   We arrive inside the window. We’re held to The Garrison Code: arrive when we say, respect the house, keep the workspace clean. We lay down a drop cloth and start the diagnostic.
3. 3
   We diagnose the Lennox by the book. Static pressure, gas pressure, voltage sequence, flame sensor reading, error-code history. Marco’s crew checks the full sequence of operation, not just the obvious part. We write down the exact failure and the exact fix with the cost of each part, in writing, before any work begins.
4. 4
   You approve the repair, we do it. If the part is on the truck, we finish now. If it’s a specialty Lennox OEM part, we tell you when it arrives and we’re back inside the window we gave you. No overtime charges, no “while we’re here” upselling.
5. 5
   We test, then we document. We run the furnace through a complete heating cycle and verify manifold pressure, temperature rise, and safety switch operation. You get a written report of what failed, what we did, and what the guarantee covers.
6. 6
   We leave it clean and stand behind it. The repair is guaranteed in writing for a full year. If it fails inside that window, we return at no charge under the 365-Day Done Right Promise.

What Lennox Furnace Repair Costs in Miami

Most Lennox furnace repairs in Miami fall between $175 and $825, depending on the part and the model. The lower end covers straightforward jobs: a flame sensor clean or a pressure switch replacement. The upper end covers a control board for a variable-speed SLP98V or a gas valve for an older G-series unit. Heat exchanger replacement, when it’s actually needed, runs higher because the component is a major part and the labor is heavy.

The main drivers are the model line, whether we use an OEM or a quality aftermarket part, and access. A Lennox in a tight attic or a crawlspace takes longer to work on than one in a garage closet, and the labor reflects that. Parts for newer modulating models cost more than parts for old single-stage units, plain and simple. Every quote is in writing before we start. Call (850) 754-6042 for a free estimate. We’ll tell you exactly what the repair costs before you decide anything.

Why Miami Homeowners Call Dalton Heating & Air Miami for Lennox Work

We’re factory-trained on Lennox equipment, but we’re not tied to a manufacturer’s sales quota. That means we recommend the repair that makes sense for your system, not the one that hits a target. If a quality aftermarket part is the right call for an older G26, we tell you. If the job calls for a Lennox OEM part to protect a warranty, we install the OEM part. The choice is yours, and we explain the difference in plain terms.

Every repair is guaranteed in writing for a full year, with a free return visit if the work doesn’t hold. We answer the phone 24/7 with a real person, and we’re background-checked, uniformed, and held to The Garrison Standard on every job. We also service Carrier and Trane, so if you have a mixed system, one call covers all of it. Marco Benitez built this crew on showing up with a written price and doing the job by the book. “Tell me what it’s doing, I’ll tell you what it costs – in writing, before I touch it.”

FAQs

Lennox Furnace Repair in Miami: Call Us

You don’t have to guess what’s wrong with your furnace, and you don’t have to wonder what the bill will be. Dalton Heating & Air Miami gives you a straight diagnosis, a written price, and a repair that’s guaranteed for a full year. Call (850) 754-6042 for a free estimate. We’re ready to head out, day or night.

Written by Marco Benitez, Owner, Dalton Heating & Air Miami at Dalton Heating & Air Miami, serving Miami and nearby areas.