This Bonaire flame sensor is a genuine replacement part for your MB3 or MB4 series gas heater. Essential for safe and reliable ignition, it helps keep your ducted heating system running smoothly, especially during those colder Australian winters when you need it most.
A working flame sensor is critical for heater safety, ensuring the gas valve only stays open when a flame is detected. Having a spare on hand or replacing a faulty one quickly helps keep call-backs to a minimum.
Best For
- HVAC technicians performing service on Bonaire gas heaters.
- Apprentices learning gas heater maintenance.
- Competent DIY owners maintaining Bonaire MB3 or MB4 units.
Compatibility
This flame sensor is designed as a direct replacement for Bonaire MB3 and MB4 series ducted gas heating units. It matches Bonaire Part Number 5441603SP. If you're running a different model, check fittings and specs before ordering.
Features
- Genuine Bonaire spare part, ensuring reliable performance.
- Direct fit for Bonaire MB3 series gas heaters.
- Direct fit for Bonaire MB4 series gas heaters.
- Critical component for safe and efficient heater operation.
What's in the Box
- 1 x Bonaire Flame Sensor (Bonaire PN 5441603SP)
Using It on the Job
- Isolate Power: Always turn off the main power supply to the heating unit at the circuit breaker and disconnect the gas supply before starting work.
- Access Panel Removal: Carefully remove the access panel to locate the existing flame sensor, typically near the burner assembly.
- Disconnect: Unplug the electrical connection from the old flame sensor. Note its orientation for correct reinstallation.
- Remove Old Sensor: Unscrew or unclip the old sensor from its mounting bracket. Inspect the burner area for any other issues while it's open.
- Install New Sensor: Mount the new Bonaire flame sensor, ensuring it's positioned correctly in relation to the flame. Reconnect the electrical plug securely.
- Test Operation: Restore gas and power, then initiate a heating cycle. Observe the burner ignition and ensure the flame sensor proves the flame, allowing the heater to continue running.
Limitations & Safety Notes
- This part is only compatible with Bonaire MB3 and MB4 series gas heaters.
- Gas appliance servicing should only be performed by a licensed gasfitter in accordance with Australian Standards.
- Always ensure power and gas supplies are isolated before commencing any work on heating units.
- Never attempt to bypass safety devices like flame sensors.
- Follow all manufacturer guidelines for installation and maintenance.
Tradie Pro Tip: Before replacing a flame sensor, try carefully cleaning the old one with a fine emery cloth or steel wool. Sometimes, a build-up of carbon can cause intermittent flame proving faults, saving you a parts trip if it's just dirty. Always check connections too!
Pair With
Consider pairing this flame sensor with other essential Bonaire heating spares like control boards, gas valves, or pressure switches to keep your service vehicle stocked. You might also find our range of general HVAC tools useful for diagnostics.