Brivis Thermistor Lead with Loom & Bracket

This Brivis Thermistor Lead with Loom & Bracket is a genuine replacement temperature-sensing component for compatible Brivis gas ducted heaters. It helps the heater monitor temperature correctly so the control system can manage heating operation and fan cycling as designed.

A failing thermistor can contribute to intermittent heating, limit operation, or unusual cycling behaviour, but it should not be guessed by symptom alone. Before ordering, confirm the original part number, heater model, and fault path so you do not replace a working thermistor when the issue is actually with the control board, pressure switch, wall controller, transformer, wiring, or another component.

Best For

• HVAC service technicians replacing a confirmed faulty Brivis thermistor lead.
• Licensed gas fitters servicing compatible Brivis gas ducted heaters.
• Appliance repair professionals matching the original thermistor part number.
• Compatible Brivis heater systems where the original component matches BS80019789, 80019789, or B019789.

Compatibility

This thermistor lead is designed for compatible Brivis gas ducted heaters. It is listed as BS80019789 and is a direct replacement for Brivis Part Number 80019789, also known as B019789, where the original component and heater application match. If you are running a different model, check the original component label, heater data plate, and system requirements before ordering.

Need help choosing? Read our Brivis heater fault diagnosis guide before ordering to confirm whether the thermistor lead, control board, pressure switch, thermocouple, pilot assembly, gas valve, transformer, or wiring is the more likely cause of the fault.

Features

• Genuine Brivis Component: Manufactured for correct fit and reliable performance in compatible Brivis heater applications.
• Integrated Loom: Supplied with the wiring loom needed for the matched component setup.
• Mounting Bracket Included: Includes the bracket required for the correct mounting position on compatible systems.
• Temperature Sensing Support: Helps the control board read temperature conditions correctly so heating and fan operation can respond as intended.

What's in the Box

• 1 x Brivis Thermistor Lead
• 1 x Integrated Wiring Loom
• 1 x Mounting Bracket

Installation Notes

1. Confirm the Fault: A qualified technician should confirm whether the thermistor is faulty or whether the issue is caused by the control board, wiring, transformer, wall controller, pressure switch, or another component.
2. Match the Part Number: Check the original component and confirm BS80019789, 80019789, or B019789 before ordering.
3. Check the Heater Data Plate: Confirm the heater model and application before fitting the replacement thermistor lead.
4. Fit According to Manufacturer Information: The replacement thermistor lead should be installed using the correct Brivis service information for the specific heater model.
5. Test Heater Operation: After installation, the technician should test temperature sensing, heating operation, and fan cycling before returning the heater to service.

Limitations & Safety Notes

• Designed for compatible Brivis gas ducted heaters where the original thermistor lead and part number match.
• Do not order by appearance alone. Match the original component label, heater data plate, and part number before ordering.
• Gas appliance servicing and any work that affects heater operation or commissioning should be handled by appropriately licensed tradespeople.
• Electrical connections and control wiring should be checked by a licensed electrician or qualified HVAC technician where required.
• Follow the manufacturer's installation information and relevant Australian gas and electrical safety requirements.
• If you smell gas, turn off the gas supply if safe to do so, avoid ignition sources, leave the area, and contact your gas emergency provider or licensed gas fitter.

Tradie Pro Tip: When replacing a thermistor lead, inspect nearby wiring for heat damage, corrosion, loose plugs, brittle insulation, or rodent damage. A damaged loom or poor connection can mimic a failed thermistor and cause repeat faults after the part is replaced.

Pair With

Pair with compatible Brivis pressure switches, transformers, control boards, wall controllers, thermocouples, pilot assemblies, and diagnostic tools when completing a full heater fault diagnosis. Always confirm the exact fault before replacing temperature-sensing or control components.