Heat pump outdoor unit being serviced on Long Island

Heat Pump Repair

Heat Pump Repair on Long Island

Same-day heat pump and mini split repair for Suffolk County homes. Cold-climate expertise, all major brands, transparent flat-rate pricing. Text us first.

Last updated: April 2026

What We Fix


Common Heat Pump Problems We Repair

These are the heat pump issues our technicians see most often across Suffolk County: ducted, ductless, and mini split systems.

Not Heating / Stuck in Cooling

A failed reversing valve keeps the system locked in the wrong mode. One of the most common cold-weather heat pump repairs. Fixable without replacing the whole unit in most cases.

Defrost Cycle Failures

Outdoor coil icing up solid means the defrost cycle isn't running correctly. Could be a board issue, a sensor, or the reversing valve. Running iced up wrecks efficiency and can damage the compressor.

Refrigerant Leaks

Low refrigerant means weak heating and cooling. We find the leak (often at a flare fitting on mini splits), repair it, pull a vacuum, and recharge to manufacturer specs. Guessing doesn't work here.

Capacitor / Contactor Failures

The compressor or outdoor fan refuses to start. Fast, common, cheap fix. Usually back running in under an hour.

Sensor & Control Board Issues

Modern heat pumps have 6-12 sensors and a control board that orchestrates everything. One bad sensor can lock the whole system out. We diagnose with manufacturer service tools, not guesswork.

Mini Split Drain & Communication Issues

Ductless systems have two failure modes you don't see with ducted: indoor drain line clogs that leak water from the wall-mounted head, and communication errors between indoor and outdoor units. Both are fixable in one visit.

Long Island Heat Pumps


Fix a Heat Pump That Stops Working in Winter

Most of our heat pump repair calls on Long Island come during a cold snap. The system was fine in fall, then a 15F night arrives and suddenly the house isn't heating. Nine times out of ten the cause is a defrost cycle issue, a sensor failure, or a reversing valve stuck in the wrong position. These are all repairable without replacing the whole unit.

We service Mitsubishi, Daikin, Carrier, Lennox, Fujitsu and LG. Mitsubishi and Daikin dominate the Long Island market because their cold-climate models (Hyper-Heat and Altherma) maintain rated capacity down to -13F. If your heat pump is one of the older air-source units rated only to 25F, you're going to see performance drop below that. That's a sizing or equipment generation issue, not a repair issue.

Ductless mini split repair is its own category. The most common mini split issues we see are drain line clogs (water dripping from the wall-mounted head), indoor-to-outdoor communication errors, and refrigerant leaks at flare fittings. All three are solvable in one visit.

Close-up of heat pump outdoor unit on Long Island

Preventive Service


A Heat Pump Tune Up Prevents Most Repair Calls

Our heat pump tune up catches capacitor wear, refrigerant drift, and defrost cycle issues before they become a no-heat call on the coldest night of the year. Maintenance plan members get priority scheduling and 10-15% off repairs if something does come up. Plans start at $29/month.

See Maintenance Plans

Heat Pump Repair Across Suffolk County

Patchogue · Medford · East Patchogue · Bellport · Sayville · Blue Point · Holbrook · North Patchogue · Ronkonkoma · Bohemia · Bayport

All heat pump and mini split brands. Ducted and ductless systems. Written quotes before any work begins.

Heat Pump Not Working?

Text Us and We'll Get a Tech to You.

Reach us at (631) 209-7090 by text or call. We'll ask a few questions about what your system is doing and schedule you the same day or next morning.

(631) 209-7090

Text preferred • All heat pump brands serviced

Common Questions


Heat Pump Repair FAQs

Most heat pump repairs on Long Island cost between $200 and $900 depending on the issue. Capacitor or contactor replacements run $200-$400. Refrigerant leak repairs with recharge are $400-$900. Reversing valve failures and compressor issues are higher. We'll give you the full repair cost upfront before any work begins, and if replacement makes more sense we'll explain that option too.

The most common causes are a failed reversing valve (stuck in cooling mode), a malfunctioning defrost cycle (ice buildup on the outdoor coil), low refrigerant from a leak, a tripped safety sensor, or a thermostat wiring issue. In cold weather, heat pumps rely on a defrost cycle to shed ice. If that cycle is broken, the system drops to backup heat and the bills spike. A diagnostic visit will pinpoint the exact cause.

Yes. We service Mitsubishi (including M-Series and Hyper-Heat), Daikin, Carrier, Lennox, Fujitsu, and LG heat pumps and mini splits. Mitsubishi and Daikin are the most common brands we see on Long Island because of their cold-climate performance. We carry common parts on the truck so most repairs finish in one visit.

Yes. Cold-weather heat pump issues are actually when we get most of our repair calls. Common cold-snap failures include iced-up outdoor coils (a defrost cycle problem), refrigerant charge issues that only show up in extreme cold, and sensor failures. We dispatch for these year-round. If your heat pump is struggling below 10-15F, that's often a sign the system is undersized for the home or the defrost cycle needs calibration.

As a general rule, if your heat pump is over 12 years old and the repair costs more than half the price of a new system, replacement usually makes more financial sense. Newer cold-climate heat pumps are significantly more efficient and qualify for PSEG, NYSERDA, and federal IRA rebates that can offset a lot of the replacement cost. We always give you both options with pricing so you can decide.

Our heat pump tune up covers refrigerant pressure check, electrical connection tightening, contactor and capacitor inspection, coil cleaning (both indoor and outdoor), condensate drain line clearing, defrost cycle verification, and a full operational test in both heating and cooling modes. A proper tune up extends equipment life and catches most problems before they become repair calls.

Yes. Mini split repair is one of our most common service calls on Long Island. We handle all major ductless brands and common mini split issues, including indoor unit not cooling or heating, communication errors between indoor and outdoor units, drain line clogs causing water leaks from the wall-mounted head, remote control pairing issues, and refrigerant charge problems.