OEM Carrier Hot Surface Igniter LH33ZS004 for Model PG9MAA048100ABKA

This is the genuine OEM hot surface igniter for the Carrier PG9MAA048100ABKA gas furnace. The igniter is the first component to activate on every call for heat — it glows to ignition temperature within seconds, lighting the burner to start your heating cycle. When it fails, the furnace control board will detect a missed ignition event and lock out the system, leaving you with no heat. Classic symptoms include a furnace that attempts to start, clicks through the ignition sequence, then shuts down after 30–90 seconds with a fault code.

• Specs: 120V AC | 5 Amp | Silicon carbide hot surface igniter | Factory OEM part number LH33ZS004 | Direct drop-in replacement — no modification required
• OEM vs Generic: OEM igniters are manufactured to Carrier's exact resistance and thermal cycling tolerances. Generic igniters frequently vary in tip geometry and resistance, leading to intermittent ignition failures or premature cracking of the fragile element.
• Install difficulty: 2/5 — Turn off power and gas before starting. Tools needed: 1/4" nut driver, needle-nose pliers. CAUTION: Never touch the ceramic element with bare hands — skin oils cause hot spots that crack the igniter. Photograph the wiring harness before disconnecting. Total job time is typically under 15 minutes.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse.

Compatibility: Factory-specified replacement for the Carrier PG9MAA048100ABKA gas furnace. Also cross-references with earlier Carrier igniter part numbers LH33ZS003, LH33ZS002, and LH33ZS001 for qualifying models. Always verify your furnace model data plate and existing part number before ordering. Our fitment team is available to confirm compatibility before you buy.