OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1PEA048120AFBA

This is the OEM factory-specified Direct Spark Ignition (DSI) Control Board for the Carrier PY1PEA048120AFBA packaged unit. The DSI control board is the brain of the heating system — it sequences the inducer motor, spark igniter, gas valve, and flame sensor in a precise timed cycle. When this board fails, you'll typically see symptoms such as a no-heat lockout condition, repeated failed ignition attempts, burners that light briefly then shut off, or an error code indicating ignition or flame sensing fault. Replacing this board with the correct OEM part restores factory-programmed timing and safety lockout logic, ensuring reliable, code-compliant operation.

• Part Number & Specs: OEM Part # LH33WP002 | Direct Spark Ignition (DSI) board | Factory-programmed ignition timing and trial-for-ignition sequence | Integrated safety lockout and fault code diagnostics
• OEM vs Generic: This is a genuine OEM Carrier board carrying factory firmware and component tolerances. Aftermarket boards may lack exact lockout timing and proprietary fault code logic, which can cause nuisance lockouts or, worse, unsafe ignition sequences.
• Install Difficulty: 3/5 — Disconnect power and gas before servicing. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, smartphone (to photograph all wiring harness connections before removal). Note all DIP switch or jumper settings on the old board and replicate them on the new one. Consult the unit's wiring diagram located inside the access panel.
• Warranty & Shipping: Backed by a 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model PY1PEA048120AFBA packaged units. Always cross-reference the OEM part number on your existing board's label before ordering to confirm fitment. Have questions about compatibility? Our HVAC parts specialists verify fitment before you order — reach out before you buy.