OEM Carrier Ignition Control Board LH33WP007 for Model PY3GNA030040AA

This is the genuine OEM Carrier ignition control board (part number LH33WP007), the factory-specified replacement for the Carrier PY3GNA030040AA system. The ignition control board serves as the brain of your furnace's heating sequence — it orchestrates the inducer motor startup, hot surface igniter activation, gas valve operation, and continuous flame supervision. When this board fails, you'll typically experience a hard lockout with no heat, repeated ignition attempts that never establish flame, or erratic error codes on your thermostat display.

• Specs: 24V | 60 Hz | OEM part number LH33WP007 | Factory-matched design for Carrier PY3GNA030040AA systems | Weight: 0.84 lbs
• OEM vs Generic: This OEM board is manufactured to exact Carrier design-life specifications, preserving your equipment warranty and maintaining all agency listings and safety standards. Aftermarket boards may use lower-grade components that compromise timing accuracy and long-term reliability.
• Install difficulty: 3/5 — Shut off power at the breaker and gas supply before beginning. Photograph all wiring harness connections before disconnecting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter for post-install verification. Recommend a qualified HVAC technician for installation.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct drop-in replacement for the Carrier PY3GNA030040AA. Always verify your existing board's part number against LH33WP007 before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — reach out before placing your order.