Control Board Replacement Cost — Furnace, Boiler & More (New Zealand, 2026)
Estimated $350–$1,900 NZD for a control board replacement in New Zealand, depending on the HVAC system and the exact fault. Built from 12 sourced repair jobs across 6 HVAC types — each row keeps its own sources. Reviewed July 2026.
What a control board 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 | Won't turn on / no power | Replace the main control PCB / board kit on the ducted gas heater | $350–$900 NZD | $700–$1,500 NZD | Pro recommended |
| Gas Furnace | Control board replacement | Replace the main control board (board kit) on a ducted gas heater | $350–$950 NZD | $750–$1,600 NZD | Pro recommended |
| Heat Pump | Not heating | Main control board (PCB) replacement — indoor or outdoor | $150–$650 NZD | $400–$900 NZD | Pro recommended |
| Heat Pump | Stuck in defrost / frozen outdoor unit | Outdoor control board (defrost control PCB) replacement | $300–$650 NZD | $600–$1,100 NZD | Pro recommended |
| Heat Pump | Defrost control board replacement | Outdoor unit main / inverter control board replacement (the board that runs defrost on a NZ heat pump) | $300–$650 NZD | $600–$1,100 NZD | Pro recommended |
| Ductless Mini-Split | Not heating | Indoor unit main control board (PCB) replacement | $90–$400 NZD | $350–$800 NZD | Pro recommended |
| Ductless Mini-Split | Error code / flashing light fault | Control board replacement for an indoor-to-outdoor communication fault (U4/E6 class code) | $90–$600 NZD | $420–$950 NZD | Pro recommended |
| Ductless Mini-Split | Outdoor unit not running | Outdoor inverter / main control board replacement | $400–$700 NZD | $650–$1,200 NZD | Pro recommended |
| Boiler | No heat / not firing up | Boiler control board (PCB) replacement after the burner fails to fire at all | $450–$1,200 NZD | $850–$1,900 NZD | Pro recommended |
| Thermostat & Controls | Smart thermostat installation | Fit a manufacturer wired wall controller or board-mounted wi-fi interface to the indoor unit | $200–$340 NZD | $350–$720 NZD | Pro recommended |
| Thermostat & Controls | Heating or cooling won't shut off | Control board (PCB) replacement where the switching relay has failed closed on the board itself | $180–$520 NZD | $400–$900 NZD | Pro recommended |
| Air Handler | Control board replacement | Outdoor inverter control board replaced where the fault is on the outdoor side | $340–$730 NZD | $750–$1,600 NZD | Pro recommended |
Base: published rates from 68 NZ repair companies · National base ranges — localize any figure on its linked problem page · Reviewed July 2026 · Estimated (GST-inclusive)
Related HVAC cost guides
The full cost guide for each HVAC system a control board 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).