OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3PNA060115AA

This OEM Direct Spark Ignition (DSI) control board is the factory-specified replacement for the Carrier PY3PNA060115AA packaged gas/electric unit. The DSI control board serves as the central brain of the heating system — orchestrating the ignition sequence, managing gas valve timing, monitoring flame signal, and coordinating inducer and blower motor operation. Common failure symptoms include a hard lockout with no ignition attempt, intermittent no-heat calls, failure to prove flame, or a system that sparks but immediately shuts down. Replacing a faulty control board with the correct OEM part restores the precise timing and safety logic the factory engineered for this unit.

• Specs: Direct Spark Ignition (DSI) control | OEM Part Number LH33WP003 | Factory-matched ignition timing, trial-for-ignition duration, and lockout logic | Fits Carrier PY3PNA060115AA packaged units
• OEM vs Generic: OEM boards carry factory-programmed firmware and exact component tolerances. Aftermarket boards may use off-spec timing circuits that cause nuisance lockouts, shorten heat exchanger life, or void equipment warranties.
• Install Difficulty: 3/5 — Disconnect power and gas before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, phone/camera to photograph all wiring harness connections prior to removal. Label every connector before disconnecting. Always verify correct 24V control voltage is present before condemning a board.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered and factory-specified for the Carrier PY3PNA060115AA packaged gas/electric unit. Verify OEM part number LH33WP003 on your existing board's label before ordering. Our fitment team is available to confirm compatibility — reach out before you buy for complete peace of mind.