AC Refrigerant Leak Repair Cost Brisbane (2026) — From $300
Installer’s price guide for diagnosing and fixing refrigerant leaks in Brisbane air conditioners — detection methods, repair costs by leak location, when leak repair makes sense vs replacing the unit.
Quick answer: Leak diagnostic from $150 (electronic sniffer). Common flare-nut leaks repair from $180. Brazed pipe repairs from $350. Coil pinhole leaks from $850. Add regas (from $250) after any leak repair.
Leak repair pricing by location (Brisbane 2026)
| Leak location | Starting from (inc GST) |
|---|---|
| Diagnostic (electronic sniffer) | From $150 |
| UV-dye detection (slow leaks) | From $220 |
| Flare-nut leak repair | From $180 |
| Schrader valve replacement | From $220 |
| Brazed pipe repair (joint or pinhole) | From $350 |
| Section pipe replacement | From $480 |
| Evaporator or condenser coil replacement (leaking) | From $850 |
| Regas after leak repair (split system) | From $250 |
Leak detection methods
Electronic sniffer. Handheld detector senses refrigerant in the air. Fast (30–60 min for a split system), sensitive to active leaks, works at all common leak points.
UV dye. Inject UV-sensitive dye into the system, let it circulate 24–72 hours, then UV-light the system to find leak. Sensitive to tiny slow leaks the sniffer might miss. Two-visit process so more expensive.
Pressure test. System pressurised with dry nitrogen, watch the pressure gauge for 30–60 minutes. Confirms whether system holds pressure. Doesn’t locate the leak by itself.
Soap bubble. Old-school method — soap solution on suspected joints reveals bubbles where gas escapes. Still useful at flare nuts.
Common Brisbane leak locations (in order of frequency)
- Flare nuts at outdoor unit. Most common — threaded joints loosen slowly over years. Re-flare or replace.
- Schrader service valves. Used during install + service; can leak after multiple gauge connections. Replace.
- Brazed joints. Brazed connections that have flexed from thermal cycling or vibration. Re-braze.
- Indoor coil pinholes. Corrosion from formic acid (Brisbane atmosphere has trace amounts). Year 8+. Replace coil.
- Outdoor coil pinholes. Salt corrosion (coastal installs). Replace coil.
- Suction line damage. Pipe insulation broken, copper rubbed against a beam. Section replace.
When leak repair makes sense vs replacement
- Unit under 8 years + simple leak (flare/Schrader): always repair. Cost from $500 with regas.
- Unit 8–10 years + simple leak: repair, plan replacement within 3 years.
- Unit 10+ years + coil leak ($850+ repair): usually replace whole unit. Coil + regas approaches new-system cost.
- Multiple leaks at once on an older unit: replacement — the system is failing.
Common questions
How much does refrigerant leak repair cost in Brisbane?
Diagnostic from $150. Flare-nut repairs from $180. Brazed pipe from $350. Coil replacement from $850. Add regas (from $250) after any leak repair.
Why does my AC keep losing gas?
It has a leak. Sealed systems shouldn’t lose refrigerant beyond ~1% per year. Common locations: flare nuts (outdoor), Schrader valves, brazed joints, coil pinholes.
How long does leak repair take?
Diagnostic 30–60 min. Repair itself 60–120 min depending on location. Regas after 60–90 min. Whole job 3–5 hours.
Will the leak come back?
Not if it’s a proper repair — flare nuts re-flared with fresh face, brazed joints with correct flux and pressure-tested. Cheap repairs often re-leak.
Can I just top up the gas without fixing the leak?
No — the new refrigerant escapes within 6–12 months. Environmentally damaging, expensive, and illegal without an ARC licence. Fix the leak.
Is leak repair covered under warranty?
If the leak cause is workmanship from the original install (less than 5 years old) — often yes. If from age, wear or external damage — customer-funded.
AH Air Conditioning · 63 Britannia Ave, Morningside QLD 4170 · ARCtick AU54321 · 20+ years across Brisbane.