Contactor Replacement Cost — AC & Heat Pump (Australia, 2026)
Estimated $220–$1,800 AUD for a contactor replacement in Australia, depending on the HVAC system and the exact fault. Built from 7 sourced repair jobs across 4 HVAC types — each row keeps its own sources. Reviewed July 2026.
What a contactor 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 |
|---|---|---|---|---|---|
| Central Air Conditioning | Contactor / relay replacement | Compressor contactor replaced in the outdoor unit | $45–$180 AUD | $280–$600 AUD | Pro recommended |
| Central Air Conditioning | Contactor / relay replacement | Contactor plus control-circuit repair on an older fixed-speed ducted outdoor unit (contactor, overload/relay and burnt terminations) | $90–$350 AUD | $420–$950 AUD | Pro recommended |
| Central Air Conditioning | Short cycling (turns on and off) | Failed capacitor or contactor causing the compressor to draw high current and trip out | $30–$200 AUD | $250–$620 AUD | Pro recommended |
| Heat Pump | Capacitor replacement | Capacitor plus contactor replaced together on an older fixed-speed ducted outdoor unit | $40–$220 AUD | $280–$520 AUD | Pro recommended |
| Heat Pump | Compressor replacement | Minor compressor repair short of a changeout — contactor, terminals, run capacitor and supply wiring rectified with the charge recovered and reinstated | $50–$400 AUD | $1,200–$1,800 AUD | Pro recommended |
| Thermostat & Controls | Heating or cooling won't shut off | Stuck contactor, relay or fan-control replacement so the unit stops running continuously | $60–$250 AUD | $220–$700 AUD | Pro recommended |
| Air Handler | Electric heat strip / auxiliary heat replacement | In-duct electric heater element or its safety contactor / hi-limit thermal cut-out replaced | $150–$700 AUD | $450–$1,300 AUD | Pro recommended |
Base: 1 published national repair-cost guide (full source registry on the methodology page), published rates from 38 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 contactor 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).