OEM Carrier Flame Sensor for PY3PNA048115NB Gas Furnace Sensor Rod

The flame sensor is the small metal rod that confirms your Carrier PY3PNA048115NB furnace actually lit. Once the burners ignite, the flame rod uses flame rectification to pass a tiny microamp DC signal back to the control board, telling it fire is present so it can safely keep the gas valve open. When the rod becomes coated with oxidation or carbon, that signal drops below threshold and the board shuts the gas off as a safety measure. The classic symptom is a furnace that lights for five to ten seconds then shuts down and repeats the cycle (short-cycling), or locks out after three tries with no heat — most often on the first cold mornings of the season. This OEM flame sensor uses a Kanthal (iron-chromium-aluminum) sensing rod and a porcelain insulator rated for continuous flame-temperature exposure. A healthy installed sensor reads roughly 2-6 microamps DC in the flame; below about 0.5 microamps the board will reject the flame. OEM geometry is what matters here: the rod length, bend, and insulator position place the tip in the correct part of the flame envelope. Generic sensors with the wrong rod length or a lower-grade alloy sit in a cooler zone or oxidize quickly, returning weak signal and bringing back the very short-cycling you are trying to fix. Install difficulty: 1/5. Tools: 1/4 inch nut driver and fine emery cloth or steel wool. SAFETY: turn off the gas and the furnace power at the breaker before reaching into the burner area. Mount the new rod without touching the ceramic with greasy fingers. 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 PY3PNA048115NB. 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.