Heat Pump & Mini-Split Repair on Long Island

Behind those symptoms is a short list of parts we test on almost every heat pump call:

• Defrost board and sensor. They decide when the outdoor coil needs defrosting. When they fail, the coil ices over and heat output drops.
• Reversing valve. It switches the system between heating and cooling. A valve stuck halfway gives lukewarm air in both modes.
• Capacitor and contactor. The most common electrical failures on the outdoor unit, and usually a quick repair.
• Refrigerant leak. Low refrigerant shows up as icing, weak heat and long run times. We find the leak before recharging, rather than topping it off.
• Condensate drain and drain pump. Clogged lines and failed pumps cause most indoor leaks, especially on attic air handlers.
• Dirty filters and coils. Mini-split filters clog fast, and a dirty outdoor coil can trigger the same shutdowns as a failed part.

A heat pump repair visit follows the same order every time:

1. We ask what it is doing. When you call, tell us whether the outdoor unit runs, whether there is ice, and any code or blinking light. That decides which parts go on the van.
2. Safety and power. The technician checks the breakers, the disconnect and the wiring before running the system.
3. Diagnosis. They read the fault codes, test the capacitor, contactor, sensors and boards with a meter, check refrigerant pressures and watch a heating cycle and a defrost.
4. A price before work. You get the cause, the repair, the price and whether it can wait, before anything is replaced.
5. Repair and test. After the repair we run the system in heat, check the temperature at the vents and confirm the drain is clear.

In K2's billing from January 2022 to October 2026, 39 ductless heat pump (mini-split) repair calls had a median of $530, and the middle 50% of customers paid $435 to $741. Read that as an estimate based on what customers paid, not a quote; the part that failed decides where in that range your repair lands. Our records don't separate ducted heat pump repairs, so we don't quote a figure for those.

What moves the price:

• The part. A capacitor, a drain cleaning, a defrost board and a reversing valve are very different jobs.
• Refrigerant work. Finding and fixing a leak, then pressure testing and recharging, takes longer than an electrical repair.
• Access. An attic air handler or a wall unit high on a stairwell takes more time than one at eye level.
• Parts availability. Some mini-split boards and sensors are brand-specific and may need to be ordered.

Maintenance plan members get a repair discount and priority scheduling; see our maintenance plans.

Repair is usually right when the failed part is a capacitor, contactor, sensor, drain or fan motor, and the system is otherwise sound. Replacement is worth discussing when the compressor has failed on an older system, when the refrigerant leak is in the coil and keeps coming back, or when repairs have stacked up two seasons running.

Our Cost Estimator puts a heat pump replacement at $6,000 to $15,000 as a planning range. For the numbers behind that, see the heat pump cost guide and what a ductless mini-split costs on Long Island. Financing is available through Rheem KwikComfort, with credit provided by Synchrony Bank, subject to credit approval. See financing for how it works.

Tip from Waseem Shahzad, Lead Technician: check the filters, the outdoor coil and the drain before anyone adds refrigerant. On three of Waseem's mini-split calls this year, in Dix Hills, Babylon and Commack, the refrigerant checked good every time. The fixes were a coil cleaning, clean filters and a cleared drain line.

You can rinse or vacuum mini-split filters yourself every few weeks in heavy use. Leave the coil chemicals, the drain clearing and anything inside the outdoor unit to us.

Heat pump frozen solid right now? See what to check safely. Blinking light or code? See mini-split error codes.

No heat at all? See no-heat help. Thinking about a new system? See heat pump installation and dual-fuel heat pumps.