OEM Carrier Flame Sensor Replacement Part for Model PY3PEA048090NB

The flame sensor is the small safety probe that confirms a flame is actually present after your Carrier furnace lights. It uses flame rectification — a microamp DC current that passes through the flame to ground — to tell the control board the burners are lit. When the sensor's surface oxidizes or the rod cracks, the board can't "see" the flame and shuts the gas valve within seconds as a safety measure. The tell-tale symptom is short-cycling on a call for heat: the igniter glows, the burners light for 2-7 seconds, then everything shuts off, and the cycle repeats. You may notice no sustained heat, the furnace locking out after several tries, or a flashing fault code on the control board. This flame sensor is matched to the PY3PEA048090NB furnace. It is a single-rod Kanthal-type sensing electrode with a ceramic insulator and a spade or screw terminal. A healthy sensor reads a flame-rectification current in the 1-6 microamp range; below roughly 0.5 µA the board will fault. The rod and porcelain must match the original so the probe sits correctly in the flame envelope. Why OEM matters: the exact rod length and bend position determine how deep the probe sits in the flame, which directly controls the microamp signal strength. Generic sensors with the wrong geometry or thinner rods read weak, oxidize faster, and cause nuisance lockouts months sooner. The Carrier OEM probe restores the full, stable signal the board expects. Install difficulty: 1/5. Tools: 1/4" nut driver, fine emery cloth, and a multimeter set to microamps DC for verification. SAFETY: turn off the gas supply and kill power at the furnace switch before removing the old sensor — never service the burner assembly with gas live. Ships same business day from our stocked warehouse on orders before 3 PM CST. 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.

Compatibility

This part is compatible with Carrier model PY3PEA048090NB. 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.