Lennox Furnace Repair Nationwide | Dalton Heating & Air Hempstead

Lennox Furnace Repair in Hempstead: What to Know First

Lennox furnace repair in Hempstead typically runs $150 to $700, depending on the part that failed. We’re an independent Lennox service provider, which means we fix the furnace you already own without trying to sell you a new one. Most Lennox repairs are done same-day or next-day, and the price is in writing before we touch anything.

Call (516) 559-4840

If you live in Hempstead and your Lennox furnace is short-cycling, throwing an error code, or making a sound it didn’t make last winter, this page tells you what’s actually going on, what it costs to fix, and what to expect when we show up. Call (516) 559-4840 and you’ll get a live person, not a voicemail queue.

How Lennox Products Fail – and How We Fix Them

Lennox builds solid equipment, but every brand has patterns. Here’s what we see most often on Lennox furnaces in Hempstead homes, especially in the older neighborhoods near Hempstead Turnpike and around Hempstead Lake State Park where furnaces often outlast their original ductwork.

• Elite Series pressure switch failures. Lennox Elite furnaces use differential pressure switches that are more sensitive than what you’ll find on Carrier or Trane units. A slightly dirty condensate trap or a small crack in the inducer hose will throw a “pressure switch open” fault. Technicians who don’t work on Lennox regularly replace the switch, get the same fault, and start guessing. We test the whole pressure circuit first, then replace only what actually failed.
• Merit Series ignitor burnout. Lennox Merit Series furnaces (ML193, ML195, and the newer ML296) use silicon nitride igniters that get brittle after 7 to 10 years of heating cycles. When one cracks, the furnace tries to light, fails, and locks out. The fix is a straight ignitor replacement: about 45 minutes of work and a part we keep stocked because we see it that often in Hempstead.
• Signature Series heat exchanger corrosion at the inlet. The Lennox Signature Series is a high-efficiency line with a secondary heat exchanger. We’re seeing early-stage corrosion where the primary heat exchanger meets the burner inlet, especially in homes with unconditioned crawl spaces or older basements that hold humidity. This is the one repair where we’ll always take combustion readings before and after to confirm proper airflow and carbon monoxide levels.
• S30 and iComfort control board communication glitches. If your Lennox furnace runs a communicating thermostat (the S30 or iComfort S40) and the furnace intermittently drops offline, the issue is usually a loose plug on the white four-pin control connection at the furnace board, not the thermostat itself. We’ll re-seat and replace the connector, update the board firmware, and skip the $400 thermostat replacement that a less familiar tech might incorrectly recommend.
• Blower motor capacitor fatigue on variable-speed units. Lennox variable-speed motors on Elite and Signature furnaces are great for airflow, but the capacitor attached to the leg that starts the motor gets weak over time. The symptom is a furnace that lights, burns for 90 seconds, then shuts down because the blower stalls. If your furnace bills itself as variable-speed and does this in Hempstead’s cold snaps, we test the capacitor before anything else.

Our Lennox Furnace Repair Process

Here’s what a Lennox furnace repair looks like from our side, every time, in Hempstead and everywhere else we work.

1. 1
   You call, a live person answers. We take your address, your Lennox model number if you have it, and the symptom. We give you a two-hour arrival window, not a four-hour one.
2. 2
   We show up inside that window. A uniformed, background-checked technician arrives, introduces themself, and puts on shoe covers before walking through your home. You know who is coming before they arrive because we tell you their name.
3. 3
   Diagnostics before parts. We check the sequence of operation: thermostat call, inducer, ignitor, flame sensor, blower. We don’t start replacing parts until we’ve isolated the failure. On Lennox equipment we use the factory fault codes on the control board, not guesswork.
4. 4
   You get a written price. Before any wrench turns, the price is on paper: parts, labor, everything. If we think an OEM Lennox part is the right call, we say so. If a quality aftermarket part makes more sense for a 14-year-old Merit, we tell you that too, with our reasoning. You approve the work first.
5. 5
   The repair, the test, the guarantee. We fix it, run a full test cycle, take a gas pressure reading, and confirm the furnace lights and shuts down correctly. Every repair carries a written 365-day guarantee. If it fails within that year, we return at no charge.
6. 6
   We leave the space clean. Old parts go in our box, not your basement. You sign the invoice, and you get a copy of the guarantee.

What Lennox Furnace Repair Costs in Hempstead

Most Lennox furnace repairs in Hempstead fall between $150 and $700. Here’s what moves the price:

• Flame sensor cleaning or replacement: $150 – $250. We clean it first. If it’s pitted past a serviceable condition, replacement is quick and cheap.
• Ignitor replacement: $200 – $350. Includes the part and labor. Common on Merit Series furnaces.
• Pressure switch replacement: $250 – $450. We test the switch under load before replacing it, so you don’t pay for a part that wasn’t the problem.
• Control board replacement: $400 – $700. This is the high end, and on a Lennox communicating furnace the board is the brain, so it’s worth getting right.
• Blower motor or capacitor work: $250 – $550 depending on the motor and whether it’s a capacitor-only fix.

The price is the price before we start. No overtime charge for a cold night, no add-on when we’re already in your basement. Estimates are free at (516) 559-4840.

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

We’re a Garrison Partners company operating under The Garrison Standard since 2003. That means a written price before any work starts on every job, a written guarantee on every repair, and a free return visit if the repair fails within the guarantee period. Those terms are not negotiable and they’re not an upgrade. They’re the floor.

Marco Benitez and his crew have been servicing Hempstead homes for years, including the older blocks around Hempstead Lake State Park where Lennox furnaces often share space with ductwork that was undersized from the day it was installed. Marco built his reputation on straight load calculations, figuring out exactly how much heat a home actually needs, not just swapping in whatever was there before. When a Lennox furnace is throwing a fault we can read it, diagnose it, and quote it without drama. We also service Carrier and Trane for when you need a second opinion or a multi-brand looked at.

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