OEM Carrier Ignition Control Board LH33WP007 for Model PY3GNAA42090AA

This is the OEM factory-specified ignition control board (IFC) for the Carrier PY3GNAA42090AA furnace. The integrated ignition control board is the brain of your heating system — it sequences every stage of the heating cycle, including draft inducer startup, hot surface ignition, gas valve activation, and blower fan operation. When this board fails, you'll typically experience a furnace that won't fire, repeatedly locks out after ignition attempts, flashes diagnostic fault codes, or shuts down entirely with no response from the thermostat.

• Specs: OEM Part Number LH33WP007 | 24V control voltage | 60Hz | Cross-references: 1068-15, 1068-83-119A, ICM291 | Weight: 0.84 lbs
• OEM vs Generic: This is the genuine Carrier factory board — not an aftermarket substitute. OEM boards are factory-programmed with exact timing sequences, fault detection logic, and safety lockout parameters. Aftermarket boards may use looser tolerances, risking nuisance lockouts or premature failure.
• Install Difficulty: 3/5 — Requires disconnecting 120V power before servicing. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, a smartphone to photograph all wire harness connections before removal. Label every connector. No soldering required — board mounts on standoffs and plugs in via connectors.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Direct OEM replacement for Carrier model PY3GNAA42090AA. Always verify your unit's existing board part number against LH33WP007 (also cross-references LH33WP007A) before ordering. If your existing board shows fault codes, photograph them before replacement — they may indicate a secondary issue. Questions? Our HVAC parts specialists verify fitment before you buy.