OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1PEB048090ABAA

This is the genuine OEM Direct Spark Ignition (DSI) control board for the Carrier PY1PEB048090ABAA packaged gas/electric unit. The DSI control board serves as the command center of the heating system, orchestrating the ignition sequence, managing gas valve operation, monitoring the flame sensor signal, and safeguarding the unit through fault lockout logic. When this board fails, common symptoms include a no-heat condition, repeated ignition lockouts, failure to initiate a call for heat, or erratic cycling where the burners light briefly and then shut down. Replacing the control board with the genuine OEM part ensures factory-matched logic timing, full compatibility with the unit's safety circuits, and restored system reliability.

• Part Number: LH33WP002 (supersedes LH33WP002A) | Direct Spark Ignition (DSI) Control Board | 460V application | Genuine Carrier OEM
• OEM vs Generic: Genuine OEM boards use factory-programmed ignition timing and lockout sequences. Aftermarket boards may use approximated logic that can cause nuisance lockouts, premature flame sensor faults, or unsafe ignition behavior over time.
• Install Difficulty: 4/5 — This repair involves line-voltage wiring and gas system controls. Recommended for licensed HVAC technicians only. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, camera or phone to photograph all wiring connections before disconnecting. Always disconnect power and lock out before servicing.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY1PEB048090ABAA packaged unit. This board is also used across multiple Carrier, Bryant, and Payne model series including 48, 574, 580, 581, 582, 583, 588, 589, and PY-prefix units — always verify your OEM part number on the unit data plate or existing board label before ordering. Our fitment team is available to confirm compatibility before you buy.