From Hilo to every neighborhood around it, UST Air Conditioning is the heating and air conditioning contractor residents trust for same-day AC repair, 24/7 emergency service and new system installations sized correctly for the Big Island homes.
Each service below has its own Hilo page with local details, pricing guidance and answers to common questions. Whether you need AC repair near me, furnace repair, heat pump repair or a full HVAC installation, UST Air Conditioning handles it in Hilo.
Fast diagnosis and repair of any central, split or window air conditioner that is not cooling, leaking, tripping breakers or making noise.
AC Repair in HiloProperly sized, correctly charged new air conditioning systems: central air, ductless mini-splits and high-efficiency heat pumps, installed right the first time.
AC Installation in HiloA thorough seasonal tune-up that cleans coils, checks refrigerant charge, tightens electrical connections and catches small problems before they become no-cool calls.
AC Tune-up in HiloNights, weekends and holidays: when the air conditioner dies in the middle of a Hawaii heat wave, a live dispatcher answers and a technician is on the way.
Emergency AC Repair in HiloRepair of whole-home ducted air conditioning systems, from the outdoor condenser to the air handler, ductwork and thermostat.
Central Air Repair in HiloThe most common call we get, solved the same day: a system that runs but cannot bring the temperature down.
AC Not Cooling Repair in HiloCompressor diagnostics, hard-start kits, and replacement of failed compressors under warranty or out of warranty, with honest advice on when replacement makes more sense.
AC Compressor Repair in HiloProper leak detection, repair and weighing in the correct refrigerant charge for R-410A, R-32 and older R-22 systems.
AC Refrigerant Recharge in HiloSingle and multi-zone ductless systems, the most popular way to cool Hawaii homes without ductwork: installation, repair, cleaning and error-code diagnostics.
Mini-split Service in HiloHeating repair for heat pumps, mini-splits in heat mode, electric furnaces and wall heaters, for the cool nights that upcountry, Volcano and windward homes really do get.
Heating Repair in HiloRepair of electric and gas furnaces, air handlers with heat strips and packaged systems: no heat, short cycling, tripped limits and noisy blowers.
Furnace Repair in HiloReplacement and new installation of electric furnaces, heat-strip air handlers, wall heaters and heat pump heating for cooler Hawaii elevations.
Heater Installation in HiloA pre-season heating check that tests elements, limits, defrost cycles and airflow so the system is ready for the first cold night.
Heating Tune-up in HiloNo heat on a cold night in Volcano, Kula or Waimea is an emergency for families with kids, kupuna or medical needs. We answer 24/7.
Emergency Heating Repair in HiloHeat pumps are the ideal Hawaii system: efficient cooling all year and heat when you need it. We repair, maintain and install all major brands.
Heat Pump Repair in HiloOne call for any heating, ventilation or air conditioning problem: central systems, mini-splits, heat pumps, ductwork and controls.
HVAC Repair in HiloDesign and installation of complete heating and cooling systems for new construction, renovations and worn-out equipment replacement.
HVAC Installation in HiloScheduled maintenance that keeps cooling and heating systems efficient, protects warranties and stops breakdowns during the hottest weeks of the year.
HVAC Maintenance in HiloHeating and cooling repair for single-family homes, condos, townhomes, ohana units and vacation rentals across Hawaii.
Residential HVAC Repair in HiloRooftop units, split systems, VRF, walk-ins and make-up air for restaurants, retail, offices, hotels and medical spaces, with maintenance contracts that keep doors open.
Commercial HVAC in HiloSealing, repair, replacement and cleaning of ductwork so cooled air reaches every room instead of the attic.
Ductwork Service in HiloSmart and programmable thermostat installation, wiring repair and setup so your system runs efficiently and you can control it from anywhere.
Thermostat Service in HiloWhole-home dehumidifiers, filtration, UV coil lights and ventilation upgrades that fight the mold, vog and humidity Hawaii homes deal with.
Indoor Air Quality in HiloThe Big Island asks more of a heating and cooling system than any other island. Hilo homes deal with humidity and salt near the coast, vog drifting from Kilauea, and cool nights at elevation where a heat pump earns its keep. We size and service equipment for that range.
Within Hilo we regularly work in Downtown Hilo, Waiakea, Kaumana, Puainako, Keaukaha, Wainaku and Panaewa.
The technician found that our ducts were leaking into the attic, which explained the hot back bedroom. Sealing them made a bigger difference than I expected and our bill dropped noticeably.
Momi E., HiloHeat pump stopped heating on a cold Volcano night. The technician walked me through a reset on the phone first, then came out the next day to replace the defrost board. Really appreciated not being charged for an unnecessary trip.
Mark G., HiloThe dehumidifier they installed ended our mold problem in the closets. Air in the house feels completely different and the AC runs less.
Lehua D., HiloAll of them: Carrier, Trane, Lennox, Rheem, Goodman, Daikin, Mitsubishi, Fujitsu, LG, Gree, Panasonic, York, Bryant and more. Our trucks carry universal and brand-specific parts.
Yes. Plan members get scheduled tune-ups, priority booking during heat waves, repair discounts and a full service history for the property.
Most common repairs, such as capacitors, contactors, drain clearing and fan motors, fall in a modest flat-rate range that we quote before starting. Larger repairs like compressors or coils are priced against replacement so you can decide. There are no hidden fees.
Same day for most repair calls and within hours for emergencies. Call (855) 459-5498 and the dispatcher gives you a real arrival window.
Yes. UST Air Conditioning answers live 24/7 and dispatches emergency technicians throughout Hilo and the rest of the Big Island for no-cool, no-heat, leaks and electrical problems.
We cover all of the Big Island, including Wainaku, Paukaa, Papaikou, Pepeekeo, Orchidlands Estates, Keaau. If you are anywhere in Hawaii, call (855) 459-5498 and we will confirm availability.
Live dispatchers 24/7. Same-day service in most areas. Flat-rate pricing before work begins.