OEM Carrier Hot Surface Igniter LH33ZS003 for PG8UAA024045ACJA

The LH33ZS003 hot surface igniter is what lights the burners in your Carrier PG8UAA024045ACJA furnace. On a call for heat, the control board sends 120V to the igniter, which glows white-hot in seconds; the gas valve then opens and the igniter lights the burner. It is the single most common no-heat failure in a furnace. When it fails you'll hear the inducer spin up and the gas valve click, but no flame follows — then the unit tries two or three more times and locks out, leaving the house cold. A failing igniter may also glow dull orange instead of bright white, or show a hairline crack in the element. Specs: this is a silicon nitride igniter, which is far more rugged and thermal-shock resistant than the older brittle silicon carbide "flat" igniters. A good silicon nitride element reads roughly 40–75 ohms cold; an open (infinite ohm) reading means the element is cracked and dead. It mounts on a ceramic block with a two-pin Molex-style plug. Why OEM matters: generic igniters are often silicon carbide or low-grade nitride with the wrong resistance, so they either draw too much current and burn out fast or never reach light-off temperature. An igniter that won't glow hot enough simply won't light the burner. The genuine LH33ZS003 is matched to the board's ~17-second warm-up timing. Install difficulty: 2 of 5. Tools: 1/4" nut driver and a multimeter to check resistance. Handle the element only by its ceramic base — skin oils cause hot spots that shorten its life. SAFETY: turn off the gas and kill the breaker before servicing. Ships same business day from our stocked warehouse on orders placed before 3 PM CST. Backed by a 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.

Compatibility

This part is compatible with Carrier model PG8UAA024045ACJA. Always verify the part number against your unit's data plate before ordering.

Why Choose OEM?

OEM parts are manufactured to the exact factory specifications for your unit. Generic aftermarket alternatives may fit physically but often use lower-rated components that reduce equipment life and void manufacturer warranties. When the cost difference between OEM and generic is $10-30, the OEM part is always the smarter investment on a system worth $5,000-$15,000.

Shipping & Returns

Same-day shipping on orders before 3 PM CST. Standard delivery 2-5 business days, express options available at checkout. 30-day hassle-free returns on uninstalled parts — free return shipping included. 1-year OEM factory warranty coverage.