Mini-Split Repair & Maintenance on Long Island

Our Housecall Pro records show 60 mini-split repair and maintenance jobs at 52 homes between February 2023 and October 2026. These are the causes that come up again and again:

• Dirty filters and coils. Clogged indoor filters and a dirty outdoor coil cut airflow and heat transfer, and can trigger the same shutdowns and flashing lights as a failed part.
• Clogged condensate drains. The most common cause of water dripping from a wall unit. We clear the line with nitrogen and clean the pan.
• Flashing lights and error codes. Sensor faults, communication faults and protection shutdowns. Some clear after a cleaning; others need a thermistor or board.
• Refrigerant leaks. Flare connections, service valves and coils. Our records include leak searches and recharges on R-410A and R-32 systems.
• Iced indoor coils. Usually low airflow or low refrigerant. On a Commack no-cooling call this summer, the iced coil was melted, the drain cleared with nitrogen and the capacitor and contactor replaced.
• Control boards on older units. On very old mini-splits, boards and sensors can be hard to find, which changes the repair-or-replace math.

A mini-split repair visit runs in this order:

1. Tell us the symptoms. When you call, tell us the brand, how many indoor units share the outdoor unit, and any code or light pattern. That decides the parts and the code table the technician brings.
2. Check the basics. The technician checks power, the remote settings, the filters and whether the outdoor unit is running.
3. Diagnosis. They read the stored fault, test sensors, the capacitor and contactor, check refrigerant pressures and temperatures, and look at the coil, blower wheel and drain.
4. A price before work. You get the cause, the fix and the price, and we tell you whether a cleaning alone is likely to solve it.
5. Repair, clean and test. We make the repair, clean what needs cleaning, run the unit, check the air temperature at the head and confirm water is leaving through the drain.

We don't post one price for mini-split repair, because a filter and coil cleaning and a board replacement are very different jobs. You get the price after diagnosis and before any work starts.

What moves the price:

• Cleaning or a part. A cleaning, a drain clearing, a capacitor and a control board are each priced differently.
• Refrigerant work. A leak search, flare repair, nitrogen pressure test and recharge takes longer than an electrical repair.
• Number of zones. A multi-zone system with four indoor heads takes longer to clean and test than a single wall unit.
• Access. A head high over a stairwell or an outdoor unit on a roof takes more time.
• Parts. Brand-specific boards and sensors sometimes have to be ordered.

Maintenance plan members get a repair discount and priority scheduling; see our maintenance plans. For replacement planning, see the heat pump cost guide.

Repair is usually right when the problem is a drain, a sensor, a capacitor, a fan motor or a cleaning, and the compressor is healthy. Replacement is worth discussing when the compressor has failed, when a coil leak keeps coming back, or when parts for an older unit are obsolete. On one older system in our records, the technician replaced a failed control board and noted that most of the unit's other parts were no longer made, so further failures might mean replacement.

When replacement makes sense, see ductless mini-split installation. Financing is available through Rheem KwikComfort, with credit provided by Synchrony Bank, subject to credit approval. See financing for how it works.

A maintenance visit is more than a filter rinse. On each indoor unit we clean the filters, check the coil and blower wheel, flush and test the condensate drain, and check the louvers and remote. Outdoors we clean the coil, check the electrical connections, the capacitor and contactor, the fan, and the line set insulation, then check operating pressures and temperatures in cooling, and in heating on heat pump models.

We do the same checks on our HVAC tune-up for central systems, and we can do both in one visit.

Tip from Waseem Shahzad, Lead Technician: if your home has mini-splits and central air, have them all looked at in the same spring visit. At a Kings Park home this April, Waseem did the cooling maintenance on two mini-split indoor units, the outdoor condenser they share and the central air system in one trip, and everything checked out before summer.

Between visits, you can rinse the indoor filters yourself and keep leaves and grass clippings away from the outdoor unit. Leave the coil chemicals, blower wheel cleaning and drain clearing to us.

Most mini-splits are heat pumps: they heat in winter as well as cool. Winter faults like icing, defrost problems and no heat are covered on our heat pump repair page. If your unit shows a code, check the mini-split error code guide first, then call us with the code.

Long Island: see AC repair across Long Island.

Blinking light or code? See mini-split error codes. No heat in winter? See heat pump repair.

Ready for spring maintenance? See our HVAC tune-up. Replacing an old unit? See ductless mini-split installation and the heat pump cost guide.