OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA120224ABWB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier PY1REA120224ABWB packaged unit. The DSI control board serves as the nerve center of the heating system — it sequences ignition, monitors the flame sensor, manages gas valve timing, and responds to thermostat signals. When this board fails, you'll typically experience a no-heat condition, repeated ignition lockout faults, or a system that attempts ignition and immediately shuts down without establishing a flame. In some cases, fault codes on the board's LED indicator will point directly to an IFC or ignition control failure.

• Specs: Direct Spark Ignition (DSI) control | 460V application | Replaces superseded part LH33WP002A | Factory-matched timing and fault logic for Carrier packaged units
• OEM vs Generic: Genuine Carrier OEM boards use factory-programmed microcontrollers with precise ignition timing tolerances. Aftermarket boards may exhibit off-spec trial-for-ignition timing, increasing the risk of nuisance lockouts or unsafe operation — always choose OEM for control boards.
• Install Difficulty: 3/5 — Requires shutting off gas and electrical supply before servicing. Photograph all wiring harness connections before disconnecting. Tools needed: screwdrivers, nut driver set, multimeter, and a wiring diagram (available on unit access panel). Best performed by a licensed HVAC technician.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier model PY1REA120224ABWB and other Carrier, Bryant, and Payne packaged units in the PY/48/574/580/581/582/583/588/589 series that utilize DSI ignition control. Always confirm your existing board's part number before ordering. Our fitment team is available to verify compatibility before you buy — order with confidence and get back to comfort fast.