OEM Carrier Ignition Control Board LH33WP007 for Model PY3GNAA42090NA

This is the genuine OEM Carrier ignition control board (part number LH33WP007), the factory-specified replacement for the Carrier PY3GNAA42090NA gas furnace. The ignition control board is the central brain of your furnace's heating sequence — it manages the inducer motor, pressure switch verification, hot surface igniter timing, gas valve activation, and continuous flame monitoring. When this board fails, you'll typically experience hard lockout codes, a furnace that attempts ignition and immediately shuts down, or a unit that is completely unresponsive despite 24V power being present at the thermostat.

• Specs: 24V control voltage | 60 Hz | OEM part number LH33WP007 | Board revision cross-references: 1068-15 | Factory-matched logic sequencing for Carrier PY3GNAA42090NA ignition timing
• OEM vs Generic: This is a genuine Carrier OEM board, not an aftermarket substitute. Generic boards often carry ±timing tolerances that can cause nuisance lockouts, improper flame-sensing thresholds, or mismatched inducer pre-purge cycles — all of which shorten furnace life and void manufacturer warranties.
• Install difficulty: 3/5 — Disconnect power and gas before beginning. Tools needed: ¼" nut driver, Phillips-head screwdriver, needle-nose pliers, smartphone (photograph all wiring harness connections before removal). Label every connector. A multimeter is recommended to verify 24V to the board prior to replacement.
• Warranty: 1-year OEM factory warranty. Ships same business day from our stocked warehouse. No waiting on a distributor transfer.

Compatibility: Engineered and factory-matched for the Carrier PY3GNAA42090NA gas furnace. Verify your existing board's part number against LH33WP007 before ordering. Cross-references include board designation 1068-15. Not sure if this fits your unit? Contact our HVAC parts specialists — we verify fitment before you buy. Order now and ship today.