OEM Carrier Flame Sensor Replacement Part for PY1PNA024040ACBA

The flame sensor in your Carrier PY1PNA024040ACBA proves that a flame is actually present once the gas valve opens. It works by flame rectification — the hot flame conducts a tiny microamp current that tells the control board it is safe to keep the gas flowing. When the sensor's rod becomes coated with oxide or carbon, that current drops and the board can no longer confirm the flame. The classic symptom is a furnace that lights for three to seven seconds, then shuts off and tries again, repeating until it locks out. Homeowners describe it as the unit "firing up but never staying lit," often with cold air at the registers and an error code on the board. This OEM flame sensor uses the correct Kanthal/stainless rod length, ceramic insulator, and mounting bracket geometry for the PY1PNA burner assembly, so it sits at the precise depth in the flame needed to generate a stable signal — typically in the 1–6 microamp range the Carrier board expects. OEM matters because the sensing current is measured in millionths of an amp. Generic sensors with a slightly wrong rod length, alloy, or insulator resistance sit too shallow or too deep in the flame, produce a weak or noisy signal, and trip the same short-cycle lockout you are trying to fix. Installation difficulty: 1 of 5. You will need a 1/4" nut driver, fine emery cloth, and a multimeter set to microamps if you want to verify the signal. #1 safety warning: turn 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 PY1PNA024040ACBA. 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.