OEM Carrier Hot Surface Igniter LH33ZS004 for Model PG9MAA024040ABKA

This is the genuine OEM Carrier hot surface igniter (part number LH33ZS004), the factory-specified replacement for the Carrier PG9MAA024040ABKA gas furnace. The hot surface igniter is a critical component in the ignition sequence — when the thermostat calls for heat, the control board energizes the igniter to glow incandescent hot, igniting the gas burner. When it fails, the furnace will attempt ignition, fail to light, and enter a lockout fault — leaving you with no heat. A cracked, broken, or open-circuit igniter is one of the most common furnace repair calls in the field.

• Specs: 120V AC | 5 Amp draw | Silicon carbide element | OEM part number LH33ZS004 | Factory-matched fit and mounting bracket
• OEM vs Generic: Genuine Carrier OEM igniters are manufactured to exact resistance and temperature specifications for the PG9MAA024040ABKA control board's ignition timing. Aftermarket units often vary in resistance, causing premature failure or nuisance lockouts.
• Install difficulty: 2/5 — Turn off gas supply and 120V power before servicing. Tools needed: 1/4" hex driver, needle-nose pliers, multimeter (to confirm open circuit on failed part). Handle the igniter element only by the mounting bracket — skin oils can cause premature cracking. Average install time: 10–20 minutes.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Fits Carrier model PG9MAA024040ABKA gas furnace. Also cross-references with superseded Carrier igniter part numbers LH33ZS003, LH33ZS002, and LH33ZS001 — verify your unit's data plate and service literature before ordering. Questions? Our HVAC parts team verifies fitment before you buy.