Braemar Ducted Heater Circuit Board PCB TH4 TH5

This Braemar Ducted Heater Circuit Board (PCB) is your direct replacement for specific TH4, TH5, TE, and TG series gas heaters, getting faulty units back up and running. It's a critical component, handling ignition, flame sensing, and fan control, which means a dead board usually means a dead heater. We've all been called out to a chilly house in winter, and having the right control board on hand saves you a trip and keeps the customer happy.

Designed to suit a range of Braemar's popular ducted gas heating systems, this PCB brings reliability back to your installs and service calls across Australia's varied climate.

Best For

• HVAC Technicians performing ducted gas heater repairs.
• Service and maintenance teams for residential heating systems.
• Homeowners with competent electrical skills diagnosing their own Braemar heater faults.

Compatibility

This circuit board, part number SY639451 (also known as Seeley PN 639451), is a direct fit for the following Braemar ducted gas heater models:

• TH4 Series
• TH5 Series
• TE Series
• TG Series
• TX Series
• TA Series
• TE4 Models
• TE5 Models
• TG4 Models
• TG5 Models
• TSS Models

If you're running a different model, check fittings and specs before ordering.

Features

• Direct replacement Braemar Heater Circuit Board.
• Controls ignition, flame detection, and fan operation.
• Essential for restoring full functionality to specified Braemar ducted heaters.
• Part number SY639451 / Seeley PN 639451 for clear identification.

What's in the Box

• 1 x Braemar Ducted Heater Circuit Board PCB (SY639451 / 639451)

Using It on the Job

1. Isolate Power: Always shut off mains power to the heater at the breaker and confirm with a multimeter before touching any wiring.
2. Access the Board: Carefully remove the heater's access panel to expose the existing PCB.
3. Document Connections: Take clear photos or label all wiring connections to the old board before removal.
4. Remove Old Board: Disconnect all wiring and mounting screws from the faulty PCB.
5. Install New Board: Mount the new SY639451 PCB securely and reconnect all wiring precisely as documented.
6. Test Operation: Restore power, follow the heater's start-up sequence, and check for correct ignition, fan operation, and any fault codes.

Limitations & Safety Notes

• Installation and electrical work on gas appliances should only be performed by a licenced gasfitter or electrician.
• Always isolate power and lockout before commencing work to prevent accidental energisation.
• Ensure the replacement board (SY639451) matches the original board's specifications and part number for your specific Braemar model.
• Incorrect installation can lead to damage to the heater or pose safety risks.

Tradie Pro Tip: Before you condemn the board, always check the simpler stuff first. Look for loose connections, faulty ignitors, or clogged pressure switches. A new board won't fix a separate peripheral fault.

Pair With

Consider pairing this with a reliable multimeter for electrical diagnostics, or a new ignitor or flame sensor if you're doing a full service on a problematic Braemar ducted heater. Check out our range of test instruments and heating spares.