OEM Carrier Flame Sensor Replacement for Furnace PG8UAA024045ADJA

The flame sensor confirms to your furnace's control board that the burners truly ignited. Sitting directly in the flame, it conducts a small rectified current back to the board; the moment that current weakens, the board assumes there's no flame and closes the gas valve within seconds as a safety measure. A dirty or worn sensor is the single most common no-heat call: the furnace lights, runs for a few seconds, then shuts down and re-tries over and over (short-cycling) before locking out cold. This is a single-rod sensor built with a high-temperature stainless/Kanthal probe and porcelain insulator dimensioned for the PG8UAA024045ADJA burner assembly. A good sensor produces a steady micro-amp signal (roughly 1-6 µA DC); once oxidation drops it below the board's threshold (~0.5 µA), you get nuisance lockouts. OEM matters because the rod's length, angle, and insulator depth position the tip precisely in the flame. Generic sensors with looser tolerances sit too shallow or too high, giving a weak, wandering signal that fails intermittently even after a fresh cleaning — and they oxidize faster, so you're back in the burner box sooner. Install difficulty: 2 of 5. Tools: 1/4" or 5/16" nut driver, fine emery cloth or a non-conductive abrasive pad, and a multimeter with a micro-amp scale to verify the new signal. #1 safety warning: shut off the gas supply AND cut power at the furnace switch/breaker before reaching into the burner compartment, and handle the brittle porcelain insulator carefully. 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 PG8UAA024045ADJA. 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.