OEM Carrier Silicon Nitride Igniter for Furnace PY3GNA042090NA

The hot surface igniter lights the burners in your Carrier PY3GNA042090NA gas furnace. On each call for heat the control board sends 120V to the igniter, which glows white-hot to ignite the gas as the valve opens. Over hundreds of heat-up cycles the element grows brittle and eventually cracks, and once it does the furnace runs its inducer and blower but makes no heat. You will typically see short-cycling, cold air from the vents, a repeating ignition-lockout flash code, and a furnace that fails right when outdoor temperatures drop and it runs hardest. This is a silicon nitride igniter, chosen over older silicon carbide because it resists thermal shock and survives far more cycles. Expect a cold resistance in the 40-75 ohm range — probe across the terminals with a multimeter, where an OL (open) reading confirms the element is done. It is a 120V hot surface design and an exact-fit match for this furnace's burner assembly and harness connector. OEM matters because aftermarket igniters often ship with out-of-spec resistance or cheaper elements; too high and they never reach ignition temperature, too low and they burn out fast. A correctly-binned OEM igniter heats to full temperature in the designed 17-34 seconds, keeping the control board out of repeated retry and hard-lockout cycles. Install difficulty: 2 of 5. Tools: 1/4-inch nut driver, Phillips screwdriver, and a multimeter to verify the failed part reads open. SAFETY: shut off both the furnace breaker and the gas supply before servicing, and handle the new igniter by its ceramic base only — fingerprints create hot spots that crack the element. 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 PY3GNA042090NA. 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.