Bosch 8738714992 Ionization Electrode

Product Description

The BOSCH 8738714992 is an ionization electrode used in gas-fired heating equipment to detect the presence of a burner flame. The electrode passes a small current through the flame to confirm ignition, allowing the control board to verify safe combustion and keep the system running. If no flame signal is detected, the control board initiates a lockout sequence to prevent unburned gas from accumulating. This part is installed by licensed HVAC technicians during routine maintenance or when a system presents with nuisance lockouts, ignition failures, or erratic flame-sensing behavior.

Ionization electrodes are typically found in residential and light commercial gas furnaces and boilers. This electrode is suited for service calls where the original sensing electrode has become coated, cracked, or otherwise degraded to the point where it can no longer pass a reliable flame signal to the control board. It serves as a direct replacement for the original part to restore proper flame-sensing function.

Key Features

• Flame ionization sensing ensures the control board receives a reliable combustion confirmation signal
• Direct OEM replacement for part number 8738722789
• Designed for gas-fired heating applications where accurate flame detection is critical to safe operation
• Replaces a degraded or failed electrode without requiring additional modifications

Compatibility

Supplied as a direct replacement for OEM part number 8738722789. Consult equipment documentation to confirm fitment before installation.

Installation Notes

Ionization electrodes are installed by qualified HVAC technicians. Before servicing, shut down the appliance and disconnect electrical power at the disconnect switch or breaker. Allow the heat exchanger and burner assembly to cool completely before handling internal components. Inspect the electrode holder and wiring harness for damage at the time of replacement, and confirm the new electrode is seated and secured properly before restoring power and testing ignition.

Technical Specifications

• Component Type: Ionization Electrode

Standard Information

• Brand: BOSCH
• Manufacturer Part Number: 8738714992