OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1PEA036100ADBA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier PY1PEA036100ADBA packaged unit. The DSI control board serves as the central command hub for the heating sequence — it manages spark ignition timing, monitors the flame sensor signal, controls the gas valve, and sequences the inducer and blower motors. When this board fails, the unit will typically enter a hard lockout, attempt ignition with no result, display fault codes, or produce no heat at all despite the thermostat calling for it.

• Specs: Direct Spark Ignition (DSI) control | 460V application | OEM part number LH33WP002 | Supersedes LH33WP002A | Factory-matched logic and timing sequences for Carrier PY-series packaged units
• OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket substitute. OEM boards maintain exact ignition timing windows, fault code logic, and flame-sensing thresholds. Aftermarket boards frequently misread flame signals or misfire ignition sequences, leading to repeat lockouts and compounding repair costs.
• Install Difficulty: 3/5 — Requires shutting off gas supply and 120V power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring harness connections before removal. Confirm all connectors are fully seated after installation and clear any fault codes before restoring power.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model PY1PEA036100ADBA packaged gas/electric units. Also used across select Carrier, Bryant, and Payne 48-, 574-, 580-, 581-, 582-, 583-, 588-, 589-, and PY-series models. Always verify your unit's data plate and existing board part number before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — ships same day, Monday through Friday.