Furnace repair across Long Island. Short cycling, no heat, ignitor and blower failures fixed with upfront pricing.
Most furnace repairs total $189–$350, including the flat $189 service call that covers diagnosis and the first hour of labor; parts are billed separately. Motors and control boards reach $400–$800 total, and you approve the exact price before any work begins.
Open enough furnaces in East Meadow, Franklin Square and Commack and a pattern emerges: ignition is the weak point. Hot surface ignitors crack, flame sensors glaze over with oxide, and either fault produces the same symptom, a furnace that clicks, tries to light, and shuts back down. These are also among the least expensive repairs we make, which is why a no-heat morning is usually resolved for far less than homeowners fear. The second cluster is airflow: filters left in place for a year choke the blower, trip the high limit, and shorten the life of the heat exchanger. If your furnace is misbehaving and you want to rule out the simple causes first, our guide on why a furnace stops working walks through the checks worth doing before you pick up the phone.
Usually a dirty flame sensor, a failed ignitor, or a limit switch cutting the burner while the fan keeps running. Occasionally it is just the fan switch set to ON instead of AUTO, which we will tell you over the phone for free.
Short cycling points to a clogged filter, a failing limit switch, or an oversized furnace. It wastes fuel and wears parts fast, and it is one of the most commonly misdiagnosed faults on Long Island warm-air systems.
Power, ignition or control board, in that order of likelihood. The diagnosis is straightforward with the panel off; most no-start furnaces are running again within the first hour of the visit.
Humming is usually a capacitor or motor bearing on the way out. Scraping means the blower wheel is contacting the housing: shut the furnace off, because running it turns a motor repair into a housing repair.
An electrical component is overheating. Shut the system down at the switch and call; this is one symptom that should never be run through overnight.
All of the major brands come through our schedule sold on Long Island: Carrier, Trane, Lennox, Rheem, Goodman, York, Bryant and American Standard, in both gas and oil-fired configurations. The trucks carry universal ignitors, flame sensors, capacitors and common control boards, so the majority of visits end with heat restored the same day rather than a parts order.
When a furnace is past saving, we say so with numbers rather than pressure. The rule we use: multiply the system's age by the repair estimate, and if the result clears $5,000, replacement usually wins. A new gas furnace installed on the island runs $5,500–$9,500, replacement estimates are free, and our furnace repair cost guide lays out where the money goes either way.
A furnace diagnosis is measurement, not guesswork. The technician watches a full ignition sequence, reads the flame signal in microamps, checks temperature rise across the heat exchanger, and pulls the stored fault history from the control board, because a furnace that fails intermittently at 6 a.m. often behaves perfectly at noon. You get a plain explanation of what failed and a total price to approve before work starts, and the $189 service call already includes the first hour of that labor, so the most common ignition repairs frequently finish inside it. Same-day availability is typical in both counties through the season; the exceptions are unusual parts on older equipment, which we order and return promptly to install.
A cracked heat exchanger turns a repair visit into a safety visit; the EPA’s indoor carbon monoxide page explains why we take any combustion fault on a furnace seriously.
| Job | Typical Long Island Price | Notes |
|---|---|---|
| Service call | $189 | Diagnosis plus the first hour of labor |
| Hot surface ignitor | $189 – $300 | The most common no-heat repair |
| Flame sensor | $189 – $275 | Cleaned or replaced; frequent cause of short cycling |
| Limit switch | $200 – $350 | Often points to an airflow problem worth solving too |
| Blower motor | $400 – $700 | Total, parts and labor; ECM motors at the top of the range |
| Control board | $450 – $800 | Board-level faults confirmed before replacement |
Ranges reflect typical Nassau and Suffolk pricing. Your exact price is quoted upfront after diagnosis. Prices as of August 2026.
Ignition components, by a wide margin. Hot surface ignitors and flame sensors cause the bulk of gas furnace no-heat calls, and both are typically fixed for $189–$300 total, including the service call.
That pattern is short cycling. The usual suspects are a dirty flame sensor that loses the flame signal, a clogged filter overheating the heat exchanger and tripping the limit, or a furnace that was oversized for the house when installed. Diagnosis tells us which, and the first two are inexpensive fixes.
Watch for short cycling, new noises on startup, a yellow burner flame, rising fuel use, and rust or soot streaks around the cabinet. Any one symptom deserves a service visit; several together, on a unit past 15 years, deserve a repair-versus-replace conversation.
Sometimes. Multiply the age by the repair price: a $250 flame sensor on a 15-year-old unit scores 3,750 and is worth doing, while an $800 control board on the same furnace clears $5,000 and argues for putting the money toward replacement. We give you both numbers and a free replacement estimate so the decision is yours.
Either the burner is not lighting while the blower keeps moving air, or the blower is running in a fan-on setting. A failed ignitor, a lockout after repeated ignition attempts, or a thermostat fan setting are the frequent causes. If the air never warms, shut the system to off and schedule service.
Both. Gas dominates Nassau and the central corridor, but oil-fired furnaces remain common in Suffolk, and our technicians service the burners and controls on both fuel types every week of the season.
Honest repair-or-replace math.
Airflow measured, not guessed.
Repair and smart thermostat installation.
Everything we repair, install and maintain across Long Island.
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