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The RCD lh33wp001 is a direct spark ignition (DSI) module designed for residential and light commercial gas heating systems. It controls the ignition sequence by generating a high-voltage spark at the burner and monitoring flame presence to allow continued gas valve operation. The module operates at 24 volts, 60Hz, and serves as a genuine OEM-style replacement for failed or faulty ignition controls. Licensed HVAC technicians handling gas furnace service and repair are the primary installers of this component.
This DSI ignition module is used in gas-fired furnace and heating applications where direct spark ignition is specified as the ignition method. It is suited for residential forced-air furnace systems that require a reliable ignition control to manage burner startup, flame sensing, and lockout sequencing. This part is sourced and distributed as an OEM replacement component for field service applications.
Designed as an OEM-style replacement ignition module for residential gas furnace systems using direct spark ignition controls.
Installation should be performed by a licensed HVAC technician familiar with gas furnace controls and low-voltage wiring. Shut off all electrical power and close the gas supply valve before removing the existing ignition module. Follow the equipment manufacturer's wiring diagram when reconnecting control leads, and verify proper flame-sensing operation after startup. Work must comply with applicable local codes and the IFGC.
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