OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model CP48P448P407010CP

This is the OEM factory-specified Direct Spark Ignition (DSI) control board for the Carrier CP48P448P407010CP packaged unit. The DSI control board serves as the central command module for the heating sequence — managing ignition timing, flame sensing, gas valve operation, inducer control, and system fault monitoring. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockouts, failure to initiate the ignition spark, or error codes that cannot be cleared by resetting the thermostat. Intermittent heating or a unit that lights once and will not re-ignite are also strong indicators of DSI board failure.

• Specs: Direct Spark Ignition (DSI) control board | OEM Part Number: LH33WP002 | Factory-matched for Carrier CP48P448P407010CP packaged unit | 24V control circuit compatible | Includes integrated fault code diagnostics
• OEM vs Generic: This is the genuine OEM Carrier board manufactured to exact factory specifications. Aftermarket control boards frequently use off-spec components that cause nuisance lockouts, improper ignition timing, and shortened service life. OEM ensures full compatibility with all sensors, valves, and motors in this unit.
• Install difficulty: 4/5 — Control board replacement requires disconnecting and reconnecting multiple low- and high-voltage wiring harnesses. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter, phone or camera to photograph all wiring before removal. Always disconnect power at the disconnect box and confirm zero voltage before beginning work. We strongly recommend a licensed HVAC technician for this repair.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our stocked warehouse.

Compatibility: This DSI control board is designed for the Carrier CP48P448P407010CP packaged gas/electric unit. Always verify the OEM part number LH33WP002 on your existing board's label before ordering to confirm fitment. If you have any questions about compatibility, our HVAC parts specialists are available to verify the correct part for your unit before you purchase — no guesswork required. Order today and ships same business day.