Brand Repair Page
Lennox HVAC Repair in NYC
AM Profs Inc diagnoses and repairs Lennox furnaces, central air conditioners, and ductless mini-splits across New York City. If an iComfort thermostat is misbehaving, a Signature Collection unit needs OEM-specific parts, or a standard system won't hold temperature, we work from the actual fault first.
24/7 urgent repair is available for Lennox furnaces and AC systems, including weekends and holidays. A no-heat call in cold weather is treated as urgent.
Covered Equipment
Gas furnaces
Central air conditioners
Ductless mini-splits
Commercial rooftop units (Landmark series)
iComfort smart thermostats
Signature Collection premium equipment
Lennox's premium Signature Collection tier uses proprietary components, which matters for parts sourcing on older NYC installations.
Quick Answer
What is the most common Lennox repair issue in NYC?
The most common Lennox calls involve furnace ignition or airflow faults, AC units losing cooling capacity, and iComfort thermostat connectivity issues. Premium Signature Collection equipment sometimes needs OEM-specific parts rather than generic substitutes, which can affect repair timelines if a part isn't already on hand.
Last updated: July 2026
Why Lennox Repairs Need Brand-Specific Service
Lennox has a genuine engineering milestone behind it: in the 1980s, the company introduced the Pulse furnace, one of the industry's first high-efficiency condensing furnaces — a real step forward in how much heat a furnace could extract from the same amount of gas.
Dave Lennox founded the company in 1895 in Marshalltown, Iowa, originally as the Lennox Furnace Company manufacturing riveted steel furnaces. Today it operates as Lennox International Inc., a publicly traded company (NYSE: LII).
What Makes The Brand Different
Signature Collection means OEM-specific parts
Lennox's premium Dave Lennox Signature Collection uses proprietary components not shared with the brand's standard equipment tier, which means a repair sometimes has to wait on an OEM part rather than a generic substitute that would work on other brands.
The iComfort smart thermostat platform ties into diagnostics on newer systems, so a connectivity or display issue is often the first thing worth ruling out before assuming a mechanical fault.
Lennox Systems We Service
Common symptoms, likely causes, what we check first, and when to call for each system type.
Gas Furnace
Common symptoms: Furnace won't ignite consistently, cycles off early, or airflow feels weak from the vents.
Likely causes: Ignitor wear, flame sensor fouling, restricted airflow tripping a limit switch, or a blower motor issue.
What we check first: Ignition sequence, flame sensor signal, airflow, and blower operation.
What work is done: Ignitor or flame sensor replacement, airflow correction, and blower motor service.
When to call: As soon as the furnace repeatedly fails to start or shuts off early in a cycle.
Central Air Conditioner
Common symptoms: AC runs without cooling effectively, cycles rapidly, or the outdoor unit is unusually loud.
Likely causes: Capacitor failure, refrigerant leak, dirty condenser coil, or a failing fan motor.
What we check first: Capacitor condition, refrigerant charge, condenser coil, and fan motor operation.
What work is done: Capacitor replacement, leak repair and recharge, coil cleaning, and fan motor service.
When to call: If the system runs constantly without reaching the set temperature.
iComfort Smart Thermostat
Common symptoms: Thermostat won't connect to Wi-Fi, display freezes, or scheduled changes aren't applied.
Likely causes: Network connectivity issue, firmware fault, or wiring problem at the equipment interface.
What we check first: Network connection, firmware status, and wiring at the furnace/AC control board.
What work is done: Thermostat reset or replacement, and wiring correction where the interface itself is at fault.
When to call: If the thermostat stops responding to schedule or manual changes.
Frequently Asked Questions
Why does my Lennox Signature Collection unit need special parts?
The Signature Collection tier uses proprietary components not shared with Lennox's standard equipment, so some repairs need an OEM-specific part rather than a generic substitute that would work on other brands or Lennox's own base models.
What is the Lennox Pulse furnace known for?
It was one of the industry's first high-efficiency condensing furnaces, introduced in the 1980s, and represented a genuine step forward in extracting more heat from the same amount of gas compared to conventional furnaces of that era.
My iComfort thermostat won't connect — is that a furnace problem?
Not necessarily. Connectivity issues are often network- or firmware-related rather than a fault in the furnace or AC itself, so that's usually the first thing to rule out before assuming a mechanical problem.
Do you service both Lennox furnaces and ductless mini-splits?
Yes, both are covered, along with central air conditioners and iComfort-connected systems.
What areas of NYC do you cover for Lennox repair?
We schedule Lennox repair across Manhattan, Brooklyn, Queens, and the Bronx.