Braemar Gas Heater Electrode, Spark & Sensor Kit #638676 Suit TH 3 / 4 Star Unit

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The Braemar Gas Heater Electrode, Spark & Sensor Kit (Part No. 638676) is a replacement kit specifically designed for Braemar gas heaters, including models such as the TH 3 and TH 4 Star Units. This kit combines critical components for the ignition and flame-sensing processes within the heater, ensuring the system operates safely and efficiently.

Key Components of the Braemar Gas Heater Electrode, Spark & Sensor Kit (Part No. 638676):

This kit typically includes the following key components:

Ignition Electrode:
- The ignition electrode is responsible for creating a spark to ignite the gas when the heater is turned on. It’s an essential part of the ignition system, triggering the burner to light up and begin heating.
Flame Sensor:
- The flame sensor detects the presence of a flame after ignition. If the sensor does not detect the flame, the system will shut off the gas supply to prevent unburned gas from being released, which ensures safe operation.
Spark Electrode:
- The spark electrode works in conjunction with the ignition electrode to create a spark that ignites the gas within the heater’s burner assembly.

Functions of Each Component:

Ignition Electrode: It generates a high-voltage spark to ignite the gas that is released into the burner assembly. If this component fails, the gas will not ignite, causing the heater to fail to start.
Flame Sensor: Once the gas is ignited, the flame sensor confirms that a stable flame is present. If it detects an issue, such as the flame going out, the sensor will send a signal to shut down the gas flow, preventing gas leakage or fire hazards.
Spark Electrode: The spark electrode assists the ignition electrode in creating the initial spark needed for ignition. If this part malfunctions, the spark needed to ignite the gas will be absent.

Common Symptoms of Faulty Electrodes, Spark, or Flame Sensor:

No Ignition:
- If the ignition electrode or spark electrode is faulty, the heater may fail to ignite when the gas supply is turned on.
Intermittent Flame:
- A faulty flame sensor may cause the heater to turn off the gas supply even though the flame is present, leading to intermittent heating.
No Gas Flow or Flame:
- If the flame sensor is defective and incorrectly signals that no flame is present, the gas valve will shut off, and the heater will not function.
Error Codes:
- Many Braemar heaters display error codes when a malfunction occurs in components like the electrode or sensor. These error codes will often reference problems with ignition or flame sensing.

How to Replace the Braemar Gas Heater Electrode, Spark & Sensor Kit (Part No. 638676):

Turn Off the Gas and Power:
- Disconnect the gas supply and turn off the power to the heater to avoid any safety risks during replacement.
Locate the Electrode and Sensor Assembly:
- Open the access panel on the Braemar gas heater to locate the electrode assembly and flame sensor near the burner or ignition area.
Remove the Faulty Electrodes and Sensor:
- Disconnect and remove the old ignition electrode, spark electrode, and flame sensor from their respective mounting positions. Take note of their placement and wiring connections to ensure the new parts are installed correctly.
Install the New Electrode, Spark, and Sensor Kit:
- Install the new components from the Braemar Gas Heater Electrode, Spark & Sensor Kit (Part No. 638676) in the same positions. Be sure to securely mount the ignition electrode, spark electrode, and flame sensor.
Reconnect the Wiring:
- Connect the wires to the new electrode and flame sensor components, following the original wiring configuration.
Reassemble the Heater:
- Once the new components are securely installed and the wiring is correctly connected, close the access panel on the heater.
Turn On Power and Gas:
- Restore the power and gas supply to the heater.
Test the Heater:
- Turn on the heater and verify that the ignition process works correctly. Ensure that the flame sensor detects the flame and that the system operates smoothly without error codes.

Maintenance Tips for the Braemar Gas Heater Electrodes & Sensors:

Regular Cleaning:
- Clean the ignition electrodes and flame sensors periodically to prevent the buildup of carbon or debris. This can be done with a soft cloth or abrasive pad. Dirt or carbon buildup can cause the electrodes to misfire, resulting in ignition failure or poor flame sensing.
Inspect for Wear and Damage:
- Inspect the electrodes and sensors regularly for signs of wear, cracks, or corrosion. Damaged components should be replaced immediately to avoid failures in ignition or flame detection.
Check the Flame:
- Periodically check the flame to ensure it is blue and steady. A yellow or flickering flame may indicate an issue with the burner or sensor.
Ensure Proper Wiring:
- Check that the electrodes and sensor are properly wired and connected. Loose or disconnected wires can lead to issues with ignition or flame sensing.

Conclusion:

The Braemar Gas Heater Electrode, Spark & Sensor Kit (Part No. 638676) is an essential kit for Braemar TH 3 and TH 4 Star units, containing the necessary components to ensure safe and efficient ignition and flame sensing. If your heater is not igniting, is displaying error codes, or has intermittent flame loss, replacing the electrodes, spark, and sensor kit can restore proper operation. Regular maintenance of these components will keep your Braemar gas heater running smoothly and safely.