How to choose an HVAC technician in Australia

The honest 8-step checklist. ARC licence checks, brand specialisation, refrigerant handling, service intervals and the red flags that cost homeowners thousands.

The 8-step checklist

1. 1. Check the ARC licence — and verify it

   Every technician handling refrigerant in Australia must hold a current ARCtick licence issued by the Australian Refrigeration Council (arctick.org). This isn't optional and it isn't state-by-state — it's federal, under the Ozone Protection and Synthetic Greenhouse Gas Management Act 1989. Anyone regassing, decommissioning, or even cracking the refrigerant circuit on a split system without an ARC licence is committing a criminal offence punishable by fines up to $63,000. Two licences exist: the Refrigerant Handling Licence (RHL) for the technician, and the Refrigerant Trading Authorisation (RTA) for the business. Both must be current. Look up the technician and the business at arctick.org — it takes 30 seconds. If a so-called HVAC tech says "don't worry about ARC, mate, I've been doing this 20 years", walk away. Twenty years of unlicensed regassing means twenty years of criminal exposure for them and a void warranty for you.

2. 2. Match brand specialisation to your unit

   HVAC manufacturers run factory-trained programs because the modern inverter units genuinely are different from each other. Daikin uses its own proprietary R32-charge calculation tables. Mitsubishi Electric's ducted systems run a fundamentally different controller protocol to Mitsubishi Heavy Industries (yes, two different companies, same name). Fujitsu uses its own diagnostic codes that don't match the AS/NZS generic format. If you have a Daikin Alira, you want a Daikin-accredited tech. Mitsubishi Heavy ducted, a MHIAA-trained installer. Fujitsu, an AirCONnect partner. Generic refrigeration mechanics can absolutely service any unit, but for warranty work and for diagnosing weird inverter board faults, brand-trained is worth the small premium. Ask: "Are you factory-accredited for Daikin/Mitsubishi/Fujitsu?" and ask for the certification number.

3. 3. Ask for a fixed quote, not hourly

   For 90% of HVAC work — a split system install, a service, a regas, a controller swap, a condensate pump fit-off — a competent tech can give you a fixed price after a quick site visit or photos. Hourly is only acceptable when the scope genuinely can't be scoped (intermittent fault on a 15-year-old ducted system, or chasing a slow leak through a multi-head VRV). If a tech refuses to fixed-quote a $400 standard service, the meter is going to run. Always get the quote in writing with materials, labour, callout fee, GST and the refrigerant cost broken out — refrigerant cost varies wildly and you should see it line-itemed.

4. 4. Know your refrigerant — R32 vs R410A

   Almost every split system sold in Australia since 2019 runs on R32 refrigerant. Older units (2009–2018-ish) run on R410A. Pre-2009, you might still find R22, which is now banned for new installs and increasingly hard to source for top-ups. R32 has roughly one-third the global warming impact of R410A and is mildly flammable (A2L classification), which means a tech needs to follow specific ventilation and ignition-source rules during install. Ask the tech: "What refrigerant does my unit run, and are you certified for A2L mildly-flammable handling?" A tech who treats R32 like R410A is at best risking a small fire, at worst voiding your install warranty. If they don't know the difference between A1 and A2L classifications, find someone who does.

5. 5. Confirm they understand service intervals

   A residential split system needs an annual service to maintain warranty and run efficiently. A ducted system needs the indoor coil and filters cleaned every 6–12 months depending on usage, the outdoor unit cleared and condenser fins straightened annually, the drain pan and condensate line flushed every service, and refrigerant pressure checked every 2–3 years. A tech who quotes you for an "annual service" that takes 20 minutes and is $79 is doing a filter swap and calling it a service — that's not a service. A real annual service runs 60–90 minutes and costs $180–$320 for a single split, $280–$480 for a typical ducted system. Ask what's included — coil clean, drain flush, fan motor inspection, refrigerant pressure check, electrical test. If the answer is fuzzy, the service is fluff.

6. 6. Ducted system experience specifically

   Ducted residential aircon is a different beast to splits. Ductwork sizing, zone damper logic, return-air placement, static pressure across the supply runs — get any of these wrong on install and the system runs but never quite works right. The bedroom is hot, the lounge is freezing, the energy bill is double. If you're hiring for a ducted install or a remediation, ask: "How many ducted systems have you commissioned in the last 12 months? Can you do a proper static-pressure test post-install?" A tech who does mostly splits and only the occasional ducted install isn't the one for a $15,000 ducted job. Ducted is its own discipline.

7. 7. Ask the after-hours and emergency policy

   It's 38°C in February, your ducted system has just dumped its refrigerant, and the kids' bedrooms are now 32°C at 9pm. That's the moment you find out whether your HVAC tech is real. Ask up front: "If I have an emergency on a 40-degree day, do you answer? What's the after-hours callout? How long until you can be on site?" A tech who can't commit clearly is one whose phone goes to voicemail. The best operators have a real receptionist or an AI receptionist that books emergency jobs on the spot during heatwaves — and that's the one you want, because they're also the tech who'll turn up when they say they will during the year.

8. 8. The phone test

   Ring the tech's number during business hours. Then ring at 5pm. Then ring at 7pm on a hot day. A tech who picks up — or has a real receptionist or an AI receptionist that books the job on the spot — has their business sorted. That's the same person who'll turn up when they say they will. A tech whose phone rings out, or who promises a callback that never comes, is showing you exactly how they'll handle your job. The phone behaviour is a near-perfect predictor of the job behaviour. We'd argue it's a stronger signal than any star rating online.

Green flags — hire with confidence

• ARCtick licence number on the quote. Both individual (RHL) and business (RTA).
• Brand accreditation named. Daikin / Mitsubishi MHIAA / Fujitsu AirCONnect — the right one for your unit.
• Knows your refrigerant. Names R32 or R410A correctly without asking.
• Real service scope. Coil clean, drain flush, filter clean, fan inspection, electrical test, pressure check.
• Insurance certificate on hand. $10M+ public liability, current.
• Answers the phone in heatwave season. Or has a receptionist booking emergency jobs on the spot.

Red flags — walk away

• No ARC licence number. They cannot legally touch refrigerant.
• $79 "annual service". That's a 20-minute filter swap, not a service.
• Doesn't know R32 from R410A. They'll wreck your unit.
• Pressure to pay 100% upfront on a ducted install. 30% deposit is standard. 100% before commissioning is not.
• No written quote. Refrigerant cost can swing $400 between techs — get it line-itemed.
• No ABN. Check it on abr.business.gov.au.
• Cash-only discount. No invoice, no GST, no warranty, no record.
• Door-knocking. Real HVAC techs don't door-knock.

The phone test — why it matters in HVAC

HVAC is the most seasonal of all the trades. The phone goes berserk on the first 38°C day of summer and again on the first cold snap. A tech who can't answer the phone on those two days is a tech who will lose half a year's revenue and your booking. The best operators have a real receptionist or an AI receptionistthat books emergency jobs on the spot — and that's the one you want, because they're also the tech who'll turn up when they say they will during the year.

For pricing context, see our Sydney aircon service pricing guide — same logic applies in Melbourne, Brisbane, Adelaide and Perth, with a $20–$40 swing depending on the city.

Frequently asked questions