OEM Carrier Flame Sensor Replacement Part for PY1PNA018040ACBA

The flame sensor in your Carrier PY1PNA018040ACBA confirms a real flame is burning after the gas valve opens, using flame rectification to pass a tiny microamp current back to the control board. As long as that current is strong, the board keeps the gas flowing; when the rod gets coated with oxide or soot, the signal collapses and the board shuts the gas off for safety. The telltale symptom is a furnace that ignites for a few seconds and then drops out, cycling on and off repeatedly before locking out. Homeowners typically feel cold air at the registers and see a flashing fault code while the unit "lights but won't stay on." This OEM flame sensor delivers the correct rod alloy, length, ceramic insulator resistance, and bracket geometry for the PY1PNA burner, positioning the tip at the exact depth in the flame needed to produce a steady 1–6 microamp signal the Carrier board trusts. OEM matters because flame sensing is measured in millionths of an amp. Generic sensors with the wrong rod length or insulator resistance won't sit correctly in the flame, generating a weak or noisy current that fails to satisfy the board — recreating the exact short-cycling lockout you're replacing the part to cure. Installation difficulty: 1 of 5. You'll need a 1/4" nut driver, fine emery cloth to clean the new rod's mounting surface, and optionally a multimeter set to DC microamps to verify the signal. #1 safety warning: shut off the gas supply and kill power at the disconnect before reaching into the burner compartment. 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 PY1PNA018040ACBA. 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.