OEM Carrier Hot Surface Igniter 120V 5A for Model PG9MAA048100ADKA — Part LH33ZS004

This OEM hot surface igniter (part number LH33ZS004) is the factory-specified replacement for the Carrier PG9MAA048100ADKA gas furnace. During every heating cycle, the control board energizes the igniter, which heats to over 1,800°F to ignite the gas burner. When this component fails, the furnace will attempt ignition, fail to light, and enter a safety lockout — leaving you with no heat. A faulty igniter is one of the most common causes of furnace no-heat calls.

• Specs: 120V AC | 5 Amp draw | Silicon carbide element | Factory OEM part number LH33ZS004 | Direct plug-in connector replacement
• OEM vs Generic: This is the genuine Carrier OEM igniter — manufactured to exact resistance and thermal-cycling tolerances. Generic igniters often use lower-grade silicon carbide that cracks prematurely under repeated heat stress, leading to repeat failures within one to two seasons.
• Install Difficulty: 2/5 — Turn off power and gas before beginning. Tools needed: 1/4" nut driver or 5.5mm socket, needle-nose pliers. Disconnect the two-wire harness, remove the single mounting screw, and swap in the new igniter. Never touch the ceramic element with bare hands — skin oils cause hot spots and premature cracking. Verify ignition sequence on first startup.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model PG9MAA048100ADKA and other Carrier, Bryant, and Payne furnaces specifying part number LH33ZS004. Also cross-references LH33ZS003, LH33ZS002, and LH33ZS001 on applicable models. Always verify your model's service literature or data plate before ordering. Our fitment team is available to confirm compatibility before you buy — just reach out before placing your order.