24/7 Emergency AC & Heating Repair across HawaiiSame-day service  |  Call (855) 459-5498
(855) 459-5498
Home/FAQ

Air Conditioning & Heating Repair Questions, Answered

Everything Hawaii homeowners ask us about AC repair, heating repair, HVAC installation and maintenance. Cannot find your question? Call (855) 459-5498.

How fast can UST Air Conditioning get to my home?

Same day for most repair calls anywhere in Hawaii, and within hours for emergencies. Our dispatchers answer 24/7 and give you a real arrival window on the phone.

Do you offer 24 hour emergency AC repair?

Yes. Emergency air conditioning and heating repair is available nights, weekends and holidays on Oahu, Maui, Kauai and the Big Island. A small after-hours dispatch fee is disclosed before we roll a truck.

How much does AC repair cost in Hawaii?

Most common repairs, such as capacitors, contactors, drain clearing and fan motors, are priced from a flat-rate book and quoted before work begins. Larger repairs like compressors or coils are compared against replacement so you can decide.

Do you charge a diagnostic fee?

Yes, a flat diagnostic fee that is credited toward the repair when you approve the work.

Which brands do you service?

All major brands: Carrier, Trane, Lennox, Rheem, Ruud, Goodman, Amana, Daikin, Mitsubishi, Fujitsu, LG, Gree, Panasonic, Bryant, York and more.

Do you install ductless mini-splits?

Yes. Single-zone and multi-zone ductless systems are our most requested installation in Hawaii. We size each head to the room and use coated coils for coastal homes.

Why does my AC run but not cool?

Usually a refrigerant leak, a failed capacitor keeping the compressor off, or restricted airflow freezing the coil. All three are diagnosed on the first visit.

Why is my air conditioner leaking water?

Almost always a condensate drain clogged with algae, which grows fast in Hawaii humidity. Turn the system off to protect your ceiling and call for drain service.

Should I repair or replace my AC?

Repair a system under 10 years old when the repair is less than a third of replacement cost. Replace R-22 systems, salt-corroded units and systems that fail every summer. We show you both numbers.

Do Hawaii homes really need heating?

Homes in Kula, Makawao, Volcano, Waimea and other mauka areas see winter nights in the 40s and 50s. Heat pumps and mini-splits in heat mode are the efficient solution, and we repair and install them.

What is a heat pump?

An air conditioner with a reversing valve that lets it heat as well as cool. It is the ideal system for Hawaii homes that need year-round cooling and occasional heat.

How often should my AC be serviced?

At least once a year, and twice a year for oceanfront homes or vacation rentals that run constantly. Salt air and humidity are hard on coils, drains and electrical parts.

Do you offer maintenance plans?

Yes. Plan members get scheduled tune-ups, priority booking during heat waves, discounted repairs and a complete service history for each property.

Do you service vacation rentals and condos?

Yes. We work with owners, property managers and resident managers, coordinate with guests and cleaners, and send invoices and reports directly to you.

Do you do commercial HVAC work?

Yes: rooftop units, split systems, VRF, PTAC and make-up air for restaurants, retail, offices, hotels and clinics, with maintenance contracts and after-hours scheduling.

Can you fix my mini-split error code?

Yes. Our technicians carry brand-specific diagnostic guides and stock common inverter boards, sensors and communication parts.

Do you offer financing for new systems?

Yes, through financing partners so a new system can be paid monthly. Ask your comfort advisor for current options.

Is my system's warranty still valid?

Most manufacturer warranties require registration and annual maintenance. We register new equipment for you and our maintenance plans document every visit.

What areas do you serve?

Every city in Hawaii. Browse the locations page for your city, or call and we will confirm availability.

How do I schedule service?

Call (855) 459-5498 any time, day or night. A live dispatcher will book the right technician and give you an arrival window.

Related services

Read more

Still have a question?

Live dispatchers 24/7. Same-day service in most areas. Flat-rate pricing before work begins.

(855) 459-5498
Call now: (855) 459-5498