OEM Carrier Ignition Control Board LH33WP007 for Model PY3GNA042090AA

This OEM ignition control board (part number LH33WP007) is the factory-specified replacement for the Carrier PY3GNA042090AA packaged gas/electric unit. The control board serves as the central command of your heating system — it sequences the inducer, hot surface igniter, gas valve, and flame sensor through every heating cycle. When the board fails, symptoms typically include a hard lockout with no ignition attempt, erratic cycling, fault codes on the board's diagnostic LED, or a complete loss of heating with the blower still running. Do not delay replacement: a failed control board can mask secondary faults and cause downstream component damage.

• Specs: 24V | 60 Hz | Ignition Control Module | OEM part number LH33WP007 | Board weight approx. 0.84 lbs | Direct drop-in replacement with no field modification required
• OEM vs Generic: This is a genuine OEM Carrier board manufactured to exact factory tolerances. Aftermarket boards may not replicate proprietary sequencing logic or fault-code behavior, leading to nuisance lockouts or premature failure of igniters and gas valves.
• Install difficulty: 3/5 — Shut off power and gas before beginning. Label and photograph all wiring harness connections before disconnecting. Tools needed: 1/4" and 5/16" nut drivers, flathead screwdriver, needle-nose pliers. Clear any fault history after installation and run a full heating cycle to verify operation.
• Warranty: Backed by Carrier OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier PY3GNA042090AA packaged unit. Verify your existing board's part number against LH33WP007 stamped on the board label before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions. Order today and this part ships same business day.