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The LOCHINVAR L100304137 is a replacement control board designed for use in high-efficiency water heating systems. The control board serves as the primary electronic management component, regulating ignition sequences, burner operation, and safety lockout functions within the appliance. Licensed HVAC technicians and plumbers working on commercial or residential water heating equipment will find this board to be a direct OEM-style replacement that restores proper system operation without requiring additional field modification.
This control board is used in water heating applications where the original board has failed or requires replacement due to fault codes, lockout conditions, or physical damage. It is intended for installation in KHB and WHB155 series water heaters, restoring electronic control and safety monitoring functions to these units.
Compatible with LOCHINVAR KHB and WHB155 series water heating equipment, as noted in the product designation.
Installation should be performed by a licensed plumber or HVAC technician. Shut off all electrical power to the water heater and allow the unit to cool before removing the existing control board. Follow all applicable local codes and the manufacturer service documentation when reconnecting wiring harnesses and verifying control board operation after installation.
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