Supported ducted, ductless, and hybrid heat-pump systems across Nassau County with written scope, pricing, and scheduling confirmed before authorized work.
Heat-pump repair begins with operating mode, thermostat call, airflow, outdoor-unit condition, defrost operation, electrical components, and refrigerant-circuit observations appropriate to the system. Equipment capability is confirmed from the make and model.
Because heat pumps provide heating and cooling, note which mode is affected, outdoor conditions, auxiliary-heat behavior, icing, error codes, noises, and whether the problem is continuous or intermittent. Call for a current appointment window or emergency ETA; timing depends on technician availability, location, traffic, weather, and demand.
We do, across Nassau County and Western Suffolk. Calls reach a live dispatcher 24/7, including nights and weekends, and dispatch confirms the next open arrival window for your address before you commit to anything.
The residential diagnostic is $199 and it buys you a written cause plus a fixed repair price before any work starts. Most common repairs land between $200 and $700 in parts and labor; you approve the number first, and larger jobs come with a repair-versus-replace comparison.
Air-source and ductless heat pumps, including defrost boards, reversing valves, inverter faults, low refrigerant charge and auxiliary-heat lockouts. Give us the make, model, thermostat reading and any error code when you call so the right parts are on the truck.
Yes. No-heat, no-cool, water leaks and gas odors are treated as emergencies, dispatched 24/7. Shut the system off, then call (516) 345-3911 and dispatch confirms current availability for your street.
Related services near you
System down right now? Call (516) 345-3911 for the next confirmed arrival window.
Beyond standard AC repair — diagnostics built for heat pump technology
The reversing valve switches your heat pump between heating and cooling modes — a component traditional ACs don't have. We test valve solenoid operation, check for internal leaks, and measure pressure differentials to determine if repair or replacement is needed.
Heat pumps must defrost outdoor coils during winter operation. Failed defrost timers, stuck defrost relays, or faulty outdoor thermistors cause ice buildup that cripples heating performance. We diagnose the complete defrost control circuit.
Heat pump refrigerant charge must be correct in BOTH heating and cooling modes — unlike traditional ACs. We measure subcooling, superheat, and pressures in both operating modes using manufacturer-specific charge charts for accurate diagnosis.
Modern ductless and ducted heat pumps use proprietary communication protocols between indoor and outdoor units. We carry Mitsubishi, Daikin, Carrier, and Lennox diagnostic tools to read error codes, sensor data, and operational history.
Different systems, different failure modes — we handle both
Nassau County has a varied heat-pump install base, including Mitsubishi Hyper-Heating mini-splits in homes without ductwork, ducted Carrier and Lennox systems that integrate with existing ducts, and Daikin multi-zone systems. These configurations use different controls, error codes, refrigerant circuits, and service procedures. Repair technicians therefore need training across ductless, ducted, and multi-zone equipment rather than treating every heat pump as a conventional air conditioner.
Long Island sits in ASHRAE Climate Zone 4A, where winter design temperatures reach 10-15°F and occasional cold snaps push below zero. Modern cold-climate heat pumps — like Mitsubishi's Hyper-Heating (H2i), Daikin's Aurora, and Carrier's Infinity with Greenspeed — use vapor injection or enhanced vapor injection (EVI) compressors to maintain heating capacity at these temperatures. But when these advanced systems fail, they require repair expertise beyond standard HVAC training. A standard AC technician may not understand why a vapor injection port is icing, why the system is defaulting to auxiliary heat at 35°F instead of its rated 5°F switchover, or how to properly recharge a system that uses different refrigerant pressures in heating mode versus cooling mode. Our technicians work on cold-climate heat pump technology every week — including factory training on Mitsubishi systems — and carry the brand-specific diagnostic interfaces needed to access advanced system parameters that generic gauges can't read.
Utility-rate eligibility and terms can change and should be confirmed directly with the utility for the service address. Auxiliary electric resistance heat generally uses more electricity than efficient compressor operation, but the bill impact depends on weather, rates, equipment, controls, and run time. During service, we can check heat-pump staging and auxiliary-heat configuration without promising a particular cost result.
Equipment capability is confirmed from the make, model, age, condition, and requested scope before scheduling.









Don't see your equipment listed? Call us to confirm service capability for the make and model.
Typical Long Island repair ranges. Diagnostic fee ($199 residential / $299 commercial) is credited toward any approved repair.
| Problem | Most Common Causes | Typical Cost |
|---|---|---|
| No Heat in Cold Weather | Failed defrost board, stuck reversing valve, low refrigerant | $300–$900 |
| No Cooling in Summer | Reversing valve, capacitor, contactor, refrigerant leak | $275–$850 |
| Outdoor Unit Iced Over | Failed defrost cycle, low charge, bad outdoor fan motor | $300–$950 |
| Ductless Head Not Responding | Communication wire fault, control board, remote sensor | $250–$700 |
| Auxiliary / Backup Heat Stuck On | Failed relay, defrost board, faulty outdoor sensor | $275–$650 |
| Loud Outdoor Unit Vibration | Failed compressor mounts, loose fan blade, bad bearings | $300–$1,200 |
Prices reflect parts + labor for residential ducted and ductless heat pumps in Nassau County.
Share the equipment type, make, model, symptoms, error codes, and safety concerns.
Dispatch confirms service capability and the current appointment window or emergency ETA.
The visit follows the installed equipment, reported symptoms, access, and observed condition.
Approve the documented scope and price before additional work begins.
The current heat-pump diagnostic is $199; many documented repair scopes fall between $299 and $1,400, depending on the identified fault and parts. The written diagnosis or proposal controls the authorized scope and total price.
Specialized heat pump diagnostics across Nassau County
From our Jericho headquarters, we provide expert heat pump repair to Jericho, Syosset, Hicksville, Woodbury, Plainview, Westbury, Old Westbury, Bethpage, Mineola, Carle Place, East Meadow, Old Bethpage, New Cassel, Williston Park, Garden City, Levittown, Hempstead, Uniondale, Farmingdale, Bellmore, North Bellmore, Wantagh, Manhasset, Great Neck, Roslyn, New Hyde Park, Floral Park, Glen Cove, Oyster Bay, Locust Valley, Brookville, Port Washington, and surrounding areas.
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Home+ Air & Heat
55 Jericho Tpke Suite 203, Jericho, NY 11753
Specialized diagnostics for ductless and ducted heat pumps. Equipment compatibility is confirmed before service.