OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA048074AAWA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP002, factory-specified for the Carrier PY1REA048074AAWA packaged unit. The DSI control board is the nerve center of your unit's heating sequence — it manages ignition timing, monitors the flame sensor signal, sequences the gas valve, and enforces safety lockouts. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockouts, burners that light and immediately shut off, or an unresponsive system that shows no signs of initiating a heating cycle. Replacing the board with the correct OEM part restores factory-programmed timing and safety logic that aftermarket boards may not replicate precisely.

• Specs: Direct Spark Ignition (DSI) control board | 460V application | Genuine Carrier OEM part | Replaces legacy part number LH33WP002A
• OEM vs Generic: OEM boards carry factory-programmed ignition timing, safety lockout sequences, and diagnostic fault codes specific to your unit. Generic or aftermarket boards may deviate in timing tolerances, risking repeated nuisance lockouts or voiding equipment warranty.
• Install Difficulty: 3/5 — Disconnect and lock out all power before starting. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, a phone or camera to document all wiring connections before removal. Label every wire harness connector. A multimeter is recommended to verify 24V control circuit integrity after installation.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY1REA048074AAWA packaged unit. Also used across Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series — always verify your unit's data plate and existing board part number before ordering. Our HVAC parts specialists are available to confirm fitment. Order now — in stock and ships today.