OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA048130AB

This is the genuine OEM Carrier LH33WP002 Direct Spark Ignition (DSI) Control Board, the factory-specified replacement for Carrier model PY3PEA048130AB packaged gas/electric units. The DSI control board serves as the brain of the heating sequence — it manages spark ignition timing, monitors flame sensing, sequences the inducer and blower motors, and protects the system via safety lockout logic. When this board fails, you'll typically experience a no-heat condition, repeated ignition lockouts, failure to initiate the heating cycle, or erratic system behavior that cannot be resolved by resetting the thermostat.

• Specs: Direct Spark Ignition (DSI) control board | 460V application | OEM Part No. LH33WP002 | Replaces superseded part LH33WP002A | Factory-matched logic and timing sequences
• OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket clone. OEM boards preserve factory ignition timing, safety lockout thresholds, and flame-sensing sensitivity. Aftermarket boards frequently introduce timing drift that causes nuisance lockouts or reduces system safety margins.
• Install Difficulty: 3/5 — Requires disconnecting 120V/24V wiring harnesses and documenting all connector positions before removal. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, smartphone (to photograph wiring). Always shut off gas supply and disconnect power at the disconnect box before servicing. Recommended for qualified HVAC technicians.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse — no waiting on special orders.

Compatibility: Engineered for Carrier PY3PEA048130AB packaged units and compatible with other Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series that share the LH33WP002 specification. Always verify your existing board's part number before ordering. Our fitment team is available to confirm compatibility — reach out before you buy for complete peace of mind. In stock and ships today.