Heat Pump Repair Experts on Long Island
Heat pumps are becoming increasingly popular on Long Island as an efficient year-round heating and cooling solution. Whether you have a ducted central heat pump or a ductless mini-split system, LI Heating & Cooling provides expert diagnosis, repair, and installation throughout Nassau and Suffolk County.
We service all heat pump types and brands — from traditional central systems to modern cold-climate mini-splits from Mitsubishi and Daikin. Our licensed technicians carry refrigerant, common parts, and diagnostic equipment on every truck to maximize first-visit fix rates.
Long Island's coastal climate can be tough on heat pump components. Salt air, humidity, and temperature swings stress outdoor units. Regular maintenance and prompt repairs keep your system running efficiently and extend its lifespan well beyond the average 10–15 years. For a deeper look at common failure patterns and what local homeowners typically pay, read our full guide to heat pump repair on Long Island.
Signs Your Heat Pump Needs Repair
- ✓No heating or cooling output despite the system running
- ✓Ice forming on the outdoor unit (outside of normal defrost cycles)
- ✓Heat pump runs constantly without reaching set temperature
- ✓Unusual grinding, squealing, or rattling noises
- ✓Blowing room-temperature air instead of heated or cooled air
- ✓Error codes or flashing lights on the thermostat or indoor unit
- ✓Significant increase in energy bills without change in usage
- ✓System short-cycling — turning on and off frequently
How much does a heat pump repair cost on Long Island?
Most Long Island heat pump repairs fall between $150 and $900, with the exact cost depending on the failed component. Refrigerant leaks and circuit-board issues tend to cost more than capacitor or fan motor replacements. The table below reflects 2026 Nassau and Suffolk County pricing.
| Repair Type | Average Cost | Typical Timeline |
|---|---|---|
| Diagnostic Service Call | $89 – $150 | 30–60 minutes |
| Capacitor / Contactor Replacement | $150 – $350 | 1 hour |
| Defrost Control Board | $300 – $600 | 1–2 hours |
| Refrigerant Recharge (R-410A) | $200 – $500 | 1–2 hours |
| Reversing Valve Replacement | $600 – $1,200 | 3–5 hours |
| Compressor Replacement | $1,500 – $2,800 | 4–6 hours |
| Full Heat Pump Replacement | $2,500 – $6,000 | 1 day |
Do heat pumps work in Long Island winters?
Yes — modern cold-climate heat pumps maintain 100% heating capacity at 5°F and 75%+ capacity at -5°F, according to the U.S. Department of Energy. Long Island's average winter low is around 20°F, well within the efficient operating range of Mitsubishi Hyper Heat, Carrier Infinity, and Daikin Aurora systems. Homeowners who switch from oil or electric resistance heat typically see 40–60% lower heating bills.
Heat pump safety & rebate resources
Before deciding between repair and replacement, review these federal and New York State resources:
- →U.S. Department of Energy — Heat Pump Systems: Federal guidance on SEER, HSPF, and sizing.
- →NYSERDA Clean Heat: Long Island rebates up to $5,000 on qualifying ducted or ductless heat pump installations.
- →ENERGY STAR — Air Source Heat Pumps: Compare certified cold-climate models and estimated annual savings.