OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY1RPA060115AAWB

This is the factory OEM Direct Spark Ignition (DSI) Control Board for the Carrier PY1RPA060115AAWB packaged gas/electric unit. The DSI control board is the central brain of your system's heating sequence — it manages the spark igniter and gas valve, controls combustion and blower motor timing, monitors flame sensing, and enforces safety lockout protocols. When this board fails, symptoms typically include a no-heat condition, a furnace that attempts ignition and then locks out, or a system that starts briefly and shuts off without establishing a stable flame. Fault codes or a blinking LED sequence on the board itself are a reliable first indicator that the control board has failed.

• OEM Part Number: LH33WP003 | Carrier Direct Spark Ignition (DSI) Control Board | Microprocessor-based ignition sequencer
• OEM vs Generic: This is a genuine Carrier OEM board — factory-programmed with exact timing sequences, trial-for-ignition periods, and lockout logic calibrated for the PY1RPA060115AAWB. Aftermarket boards can introduce off-spec ignition timing that shortens heat exchanger life or triggers nuisance lockouts.
• Install Difficulty: 3/5 — Requires disconnecting 120V power and all low-voltage control wiring. Photograph all connector positions before removal. Tools needed: flat-head and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Recommended for qualified HVAC technicians.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3PM local time.

Compatibility: Engineered as a direct OEM replacement for the Carrier PY1RPA060115AAWB packaged unit. Always verify the part number printed on your existing board before ordering. If you have any questions about fitment, our HVAC parts specialists are available to confirm compatibility before you buy. Order now — in stock and ships today.