OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY3PEA036060NA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier PY3PEA036060NA packaged unit. The DSI control board serves as the central command module for the heating sequence — it manages ignition timing, monitors the flame sensor, sequences the gas valve, and coordinates the inducer and blower motors. When this board fails, you may experience a complete no-heat condition, a system locked out after repeated ignition attempts, erratic short-cycling, or fault codes indicating ignition or pressure switch errors. Replacing this board with a genuine OEM part restores factory-programmed timing and safety lockout logic, ensuring safe and reliable furnace operation.

• Specs: 460V application | Direct Spark Ignition (DSI) control | Manages gas valve sequencing, inducer pre-purge, and blower post-purge timing | Factory-matched replacement for LH33WP002 and supersedes LH33WP002A
• OEM vs Generic: Genuine Carrier OEM boards carry exact firmware, safety lockout thresholds, and timing sequences programmed for your unit. Aftermarket boards often use approximated timing that can cause nuisance lockouts, premature component wear, or — in worst cases — unsafe operation.
• Install difficulty: 3/5 — Requires disconnecting low-voltage control wiring and high-voltage supply leads. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, phone/camera to photograph all wiring before disconnection. Always disconnect power at the disconnect and breaker before servicing. Confirm no fault codes with a thermostat call-for-heat test after installation.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse — in stock and ready to go.

Compatibility: Designed for the Carrier PY3PEA036060NA packaged unit. This board also fits a wide range of Carrier, Bryant, and Payne packaged and rooftop models in the 48, 574, 580, 581, 582, 583, 588, 589, and PY series. Always verify your existing board's part number against the unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you buy if you have any questions.