OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1PEA048100AGBA

This is the factory OEM Direct Spark Ignition (DSI) Control Board (part number LH33WP002) for the Carrier PY1PEA048100AGBA packaged heating and cooling unit. The DSI control board is the brain of the heating system — it sequences the inducer motor, manages the direct spark ignition event, monitors the flame sensor, and enforces safety lockout logic. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockouts, failure to prove flame even with a clean sensor, or erratic short-cycling of the burner assembly.

• Specs: Direct Spark Ignition (DSI) control board | Factory-matched for Carrier PY1PEA048100AGBA packaged unit | OEM part number LH33WP002 | 24V control circuit compatible | Integrated safety lockout and retry logic
• OEM vs Generic: This is a genuine Carrier OEM board — firmware, timing sequences, and safety thresholds are factory-calibrated to exact specifications. Aftermarket boards may use mismatched ignition timing or trip thresholds, risking nuisance lockouts, voided warranties, or unsafe operation.
• Install Difficulty: 3/5 — Requires disconnecting 120V line voltage and 24V control wiring. Always shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring harness connections before removal. A qualified HVAC technician is recommended.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day when ordered before cutoff.

Compatibility: Engineered as a direct OEM replacement for the Carrier PY1PEA048100AGBA packaged unit. Always cross-reference the part number on your existing board's label before ordering to confirm fitment. Have questions about compatibility? Our HVAC parts specialists are available to verify your application before you buy — order with confidence and get back up and running fast.