Brivis Ducted Gas Heater Spare Parts: Complete Parts Guide Australia
When a Brivis ducted gas heater goes down in the middle of a Melbourne cold snap or a frosty Canberra morning, the last thing you want is a week-long wait for parts. The good news is that most Brivis heater faults come down to one specific component — and once you've identified it, the repair is usually straightforward for a licenced gas fitter. This guide walks through every major component category in the Brivis range: what it does, when it fails, how to identify the correct replacement, and what to watch out for when ordering. If you already know your part, browse our full range of Brivis ducted gas heater spare parts and filter by component type.
Written by Rica Francia Macaspac, HVAC Shop content writer, in consultation with Aussie HVAC tradies and industry experts. Published: June 2026 · Last reviewed: June 2026.
What Are Brivis Spare Parts?
Brivis spare parts are the individual components that make up a Brivis ducted gas heating system. Rather than replacing an entire unit when something stops working, most faults can be resolved by replacing the specific component that has worn out or failed — often at a fraction of the cost of a new system. For a heater that's otherwise in good condition, parts replacement is nearly always the right call.
The Brivis range spans several decades and multiple model families — the Star, NetworkPlus, CSX, and Breezer series among them — which means parts compatibility isn't always straightforward. Some components have been carried across model families for years; others are generation-specific. The safest approach is always to match by the manufacturer BS part code rather than by appearance or description alone.
The main component categories across the Brivis range include ignition components (pilot burners, flame sensors, and ignition lead assemblies), gas valves (24V solenoid valves that control gas flow to the burner), pressure switches (safety devices that monitor combustion airflow), control boards and PCBs (the electronic brain of the system), combustion fans (which draw air through the heat exchanger), heat exchangers (the sealed chamber where combustion heats the air stream), thermocouples and thermistors (temperature sensing components), and transformers (which step mains voltage down to the 24V used by the control circuit).
One critical distinction to get right before ordering any part: gas type. Brivis heaters are configured for either natural gas (NG) or LPG, and many replacement components — particularly gas valves, burners, and pilot assemblies — are gas-type specific. Fitting an NG-rated part to an LPG system, or vice versa, is a safety hazard and a breach of AS/NZS 5601. The gas type your unit runs on is listed on the data plate, usually found inside the front access panel.
Tradie Pro Tip: Always pull the gas type from the data plate before ordering — don't rely on what the homeowner tells you. It's common for owners to not know whether their system runs on natural gas or LPG, especially on older installs where the original commissioning paperwork has been lost.
Common Components That Fail on Brivis Heaters
Understanding which components are most likely to fail helps narrow a fault quickly and get the right part on order before the site visit. The following are the most frequently replaced parts across the Brivis ducted gas heater range, along with the symptoms that point to each one.
Pilot Burners and Flame Sensors (Ignition Faults)
The pilot burner is responsible for igniting the main burner. When the pilot fails to light, fails to stay lit, or the flame sensor fails to confirm a valid flame, the control board will lock the system out and prevent firing. Common symptoms include a clicking noise with no ignition, a brief flame that extinguishes immediately after the igniter stops clicking, or a persistent fault code on the wall controller.
The HCCA621 assembly is the primary replacement for pilot and ignition faults on Brivis heaters. The HCCA621 pilot lead assembly includes the pilot burner, lead, and associated components as a complete unit — which makes replacement cleaner than sourcing individual sub-components. Installation must be carried out by a licenced gas fitter in accordance with AS/NZS 5601.
Pressure Switches (Pa-Rated, Must Match Exactly)
The pressure switch is a critical safety component that monitors combustion airflow through the heat exchanger. Before the gas valve is permitted to open, the pressure switch must confirm that the combustion fan is drawing air at the correct rate. A failed switch — or one with the wrong Pascal rating — will prevent the heater from firing at all.
This is the component where wrong-part orders happen most often. Brivis heaters use pressure switches rated at 50, 80, 115, 140, and 165Pa depending on the model and fan configuration. These ratings are not interchangeable. A switch that looks physically identical to the original may carry a completely different Pa rating, and fitting it will result in either a permanent lockout or — in a worst case — unsafe operation. Always read the Pa rating from the label on the original switch before ordering. The Brivis pressure switch 80Pa (BS80021373) is one of the most common variants across mid-range Brivis models, but confirm against your unit before purchasing.
Control Boards and PCBs
The control board (PCB) manages the entire heating sequence — from triggering the igniter to opening the gas valve, confirming flame, and modulating output. A faulty board can produce a wide range of symptoms: lockout faults with no obvious cause, failure to start despite other components checking out, inconsistent heating cycles, or a wall controller that shows power but doesn't respond to inputs.
Control boards should generally be the last component replaced after other faults have been ruled out, because PCB failure is less common than ignition, pressure switch, or thermocouple failure — and boards are among the higher-cost parts in the system. When you do reach the board, variant selection matters: the N-E6 exists in two versions, and fitting the wrong one will cause communication issues with the rest of the system. More on board identification below.
Gas Valves
The gas valve controls the flow of gas from the supply line to the burner. On Brivis heaters the primary valve platform is the White Rodgers 24V solenoid type. Gas valve failure typically presents as no flame despite a functioning pilot and ignition circuit — the pilot lights, the flame sensor confirms it, but the main burner never opens. In some cases a partially failing valve will produce erratic heating: the unit fires intermittently or shuts down mid-cycle. Gas valve replacement must always be carried out by a licenced gas fitter.
Thermocouples
The thermocouple is a flame-sensing device that generates a small millivolt signal when heated by the pilot flame. This signal holds the gas valve open. As a thermocouple ages, the signal it generates weakens. The classic symptom is a pilot that lights cleanly but goes out five to thirty seconds after the igniter stops — the thermocouple can't sustain the voltage needed to keep the valve open. Thermocouple selection by length and termination type is covered in detail in the dedicated section below.
Did You Know? Thermocouple failure is one of the most common misdiagnoses on Brivis heaters. The pilot-lights-then-dies symptom is textbook thermocouple, but it can also be caused by a draught issue or a partially blocked pilot orifice. Always confirm by measuring thermocouple output voltage (should be 15–30mV with pilot lit) before ordering.
How to Identify the Correct Part by BS Code
Every genuine Brivis replacement part carries a manufacturer part number prefixed with BS — or sometimes B for older components and some accessories. These BS codes are the most reliable way to identify the correct replacement part and confirm compatibility with your unit. Matching by appearance alone is a reliable path to ordering the wrong part, particularly for pressure switches, thermocouples, and control board variants that look similar but are not interchangeable.
Where to Find the Data Plate and BS Codes
The unit's data plate is typically located inside the front access panel or on the main body of the heater. It lists the model series, serial number, gas type, input rating, and sometimes the key fitted component part numbers. This is your primary reference point for any parts identification task.
Beyond the data plate, read the BS code directly from the component you are replacing wherever possible. The code is typically printed on a label adhered to the component body or stamped into the casing. For pressure switches, the Pa rating and BS code appear on the switch label — always use these rather than guessing from model number alone, since the same heater model may have been fitted with different Pa-rated switches across production runs.
Why Gas Type Matters
The data plate confirms whether the unit is configured for natural gas (NG) or LPG. Gas-specific components — including gas valves, pilot assemblies, and burners — are calibrated for a specific gas type and orifice size. Installing an NG-rated component on an LPG system will result in incorrect flame characteristics, incomplete combustion, and a breach of AS/NZS 5601 gas installation standards. This is not a borderline issue — it's a safety and compliance failure. Always verify gas type from the data plate before ordering any gas-contact component. For further information on gas installation licensing requirements in your state, refer to Safe Work Australia.
Why Pa Rating Matters for Pressure Switches
The Pascal (Pa) rating on a pressure switch defines the specific pressure differential at which the switch trips. This rating is determined by the combustion fan specification and heat exchanger design of each heater model — which is why the rating is not interchangeable even between units in the same product family. A switch with the wrong Pa rating installed in a unit will either never trip (preventing operation entirely) or trip at the wrong point (allowing unsafe operation). Read the rating from the original component. If the original is damaged or missing, contact us with the full model number from the data plate and we can help confirm the correct Pa rating.
Brivis Spare Parts by Component: Specifications and Selection Guide
The table below summarises the key spare parts categories across the Brivis ducted gas heater range, the selection criteria for each, and the most common ordering mistake to avoid. Use this as a quick reference when identifying parts on site.
| Component | Key Selection Criteria | Common Variants | Most Common Ordering Mistake |
|---|---|---|---|
| Pressure Switch | Pa rating + bracket configuration | 50, 80, 115, 140, 165Pa | Ordering by appearance — Pa rating must match exactly |
| Control Board (PCB) | N-E6 variant (with or without integrated switch) | N-E6 with switch (BS81008783), N-E6 no switch (BS81065300) | Ordering wrong N-E6 variant — they are not interchangeable |
| Thermocouple | Length + termination type | 18 inch or 24 inch; clip and nut or straight | Wrong length — too short won't reach pilot flame |
| Transformer | Amperage rating (must match original) | CSX 1.75A (BS80024702), 24V 2.25A (BS80021729) | Under-rated amperage causes overheating under load |
| Pilot Lead Assembly | Gas type (NG or LPG) | HCCA621 platform (BS80021192) | Ordering wrong gas type — NG and LPG not interchangeable |
| Gas Valve | Gas type + valve platform | White Rodgers 24V (W0085) | Gas type mismatch — always confirm NG vs LPG from data plate |
| Burner Zip Tube | MJ rating matched to unit capacity | 15/52MJ, 85/92MJ, 120MJ | Selecting wrong MJ size for heater output rating |
Control Boards and Electronic Components
The N-E6 is the most widely used control board across the Brivis, Braemar, and Bonaire ducted gas heater platforms — which is part of what makes it a stock item rather than a special-order component. However, the N-E6 exists in two distinct variants that are not interchangeable, and ordering the wrong one is a common mistake.
The N-E6 with integrated switch (BS81008783) and the N-E6 without switch (BS81065300) differ in how the board interfaces with the system's switching circuit. Fitting the wrong variant will result in the board not communicating correctly, which can manifest as persistent lockout, failure to enter heating mode, or erratic operation that appears to be a wiring fault. Before ordering, physically inspect the original board and confirm whether a switch is present on the board itself.
The Brivis N-E6 control board with integrated switch is stocked as a genuine replacement part. The no-switch variant is also stocked separately — confirm which you need before ordering. Control board replacement should always be carried out by a qualified technician; while the board itself doesn't contain gas components, the ignition sequence it manages involves gas, and system commissioning following PCB replacement requires a licenced gas fitter.
Thermocouples and Temperature Sensing
Thermocouples on Brivis heaters are available in two standard lengths — 18 inch and 24 inch — and within each length, in different termination types. Getting the wrong length or termination is a straightforward mistake that causes an unnecessary second site visit, so it's worth spending an extra minute confirming the correct variant before ordering.
The 18 inch thermocouple is the more common variant on older Brivis heater models; the 24 inch suits more recent units where the geometry between the pilot assembly and gas valve connection requires a longer run. Termination types include clip and nut — where the thermocouple rod clips into the pilot assembly and is secured by a compression nut at the gas valve end — and straight, which inserts directly without a clip fitting. A thermocouple that is too short won't sit correctly in the pilot flame, producing weak or inconsistent output; the wrong termination type simply won't secure at the valve end.
The Brivis gas heater thermocouple 18 inch variant suits older model units. For 24 inch clip and nut types, check the product listing and compare against the termination on the original component before ordering. Thermocouple replacement requires disconnection from the gas valve and must be carried out by a licenced gas fitter under AS/NZS 5601.
Transformers
The transformer in a Brivis ducted gas heater steps mains voltage (240V) down to the 24V used by the control circuit, gas valve solenoid, and associated electronics. A failed transformer typically presents as a completely unresponsive unit — no display, no response to the wall controller, no activity when the system should be calling for heat. It's worth checking the transformer early in a no-power diagnosis because it's one of the lower-cost components in the system and one of the easier replacements for a qualified sparky or HVAC tech to handle.
Two transformer variants are common across the Brivis range. The CSX 1.75A (BS80024702) suits units with lower control circuit current draw; the 24V 2.25A (BS80021729) is used where higher current draw is required. The amperage rating must match the original — a transformer running below its rated load is fine, but one running consistently above its rating will overheat. Read the amperage from the label on the original transformer before ordering. The Brivis 24V transformer 2.25A is the higher-draw variant and suits the majority of current-generation Brivis models. Transformer replacement involves 240V mains wiring and must be performed by a licenced electrician or qualified HVAC technician.
Tradie Pro Tip: On older Brivis heaters in coastal areas — think Sydney northern beaches or Gold Coast homes near the water — check the transformer terminals for corrosion before condemning the transformer itself. Salt-laden air can cause terminal oxidisation that mimics a dead transformer on a multimeter reading. Clean the terminals first and re-test before ordering a replacement.
Cross-Brand Compatibility: Braemar, Bonaire, and Buffalo
One of the more useful aspects of the Brivis platform is that a significant number of components are shared across the Brivis, Braemar, Bonaire, and Buffalo ducted gas heater families. These brands were developed on the same engineering platform, which means the N-E6 control board, White Rodgers gas valve, and several pressure switch variants are common across all four brands. If you're servicing a Braemar or Bonaire unit and need a control board or pressure switch, Brivis-coded parts will often apply.
That said, cross-brand compatibility should always be verified by BS part number rather than assumed from brand name alone. Some heat exchangers, wiring looms, and generation-specific components differ between brands even when the units look similar externally. The BS code on the original component is the definitive check — if the BS code matches, the part fits. If you're unsure, contact us with the BS code and model number and we can confirm before you order.
Frequently Asked Questions
