Gas Valve Replacement Cost — Furnace & Boiler (Australia, 2026)
Estimated $280–$1,100 AUD for a gas valve replacement in Australia, depending on the HVAC system and the exact fault. Built from 5 sourced repair jobs across 3 HVAC types — each row keeps its own sources. Reviewed July 2026.
What a gas valve replacement costs, by HVAC and fault Estimated
Each row is a real sourced repair job whose description matched this part. Parts and total are that job's own national range — follow the problem link to localize it to your area.
| HVAC | Problem | Repair | Parts | Total | DIY |
|---|---|---|---|---|---|
| Gas Furnace | Gas valve replacement | Gas valve replacement plus full AS 4575 re-commission and carbon monoxide test | $180–$399 AUD | $480–$800 AUD | Pro recommended |
| Boiler | No hot water | Repair of the separate instantaneous gas hot water unit (pilot/gas valve fault) — the far more common Australian case | $40–$220 AUD | $350–$650 AUD | Pro recommended |
| Boiler | Pilot light won't stay lit | Gas valve replacement where the pilot will not hold flame | $200–$520 AUD | $450–$950 AUD | Pro recommended |
| Boiler | Ignition fault / lockout | Gas valve replacement after repeated lockout, with gas pressure and combustion re-test | $200–$520 AUD | $560–$1,100 AUD | Pro recommended |
| Oil Furnace | Not heating / no heat | Gas ducted heater burner clean plus ignition or gas valve fault (the local analog Australians actually book) | $0–$450 AUD | $280–$750 AUD | Pro recommended |
Base: published rates from 29 Australian repair companies · National base ranges — localize any figure on its linked problem page · Reviewed July 2026 · Estimated
Related HVAC cost guides
The full cost guide for each HVAC system a gas valve replacement shows up in:
Estimated national ranges aggregated from the linked problem pages — no per-page localization is applied here. See the methodology for the localization method and named sources.
Reviewed by a Red Seal–certified appliance technician who also holds a Technical Safety BC gas ticket (Gas-C) and an ODS/halocarbon refrigerant ticket (CFC/HCFC/HFC).