Honeywell LG1093AA45 is a flame sensor (also known as a flame rod or flame detection electrode) commonly used in gas-fired heating systems, such as furnaces, boilers, and water heaters.
Key Features:
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Type: Flame rod (ionization-based flame sensor)
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Application: Detects the presence of a flame by sensing the ion current when a flame is present.
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Compatibility: Used in Honeywell and other gas control systems.
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Material: Typically made of high-temperature-resistant metal (e.g., stainless steel or silicon carbide).
How It Works:
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The flame rod is positioned in the burner flame.
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When the flame is present, it conducts a small electrical current (ionization current) due to the flame’s conductive properties.
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The control board monitors this current to confirm flame presence.
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If no flame is detected, the system shuts off the gas valve for safety.
Common Issues & Troubleshooting:
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Faulty Flame Sensor: Can cause intermittent or no ignition.
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Dirty Flame Rod: Soot or carbon buildup can prevent proper flame detection (clean with fine sandpaper or steel wool).
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Improper Positioning: Must be correctly placed in the flame envelope.
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Electrical Issues: Check wiring and connections to the control board.
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