OEM Carrier Furnace Flame Sensor for PG8DAA024070AAJA Gas Unit

The flame sensor confirms that your Carrier PG8DAA024070AAJA actually lit a flame after the gas valve opens. It's a single metal rod that sits in the burner flame and uses flame rectification — the flame conducts a tiny microamp DC current to ground, telling the control board it's safe to keep the gas on. When the rod becomes coated with oxide and carbon, that current drops below the board's threshold; the board can no longer 'see' the flame and shuts the gas off within seconds as a safety response. The textbook symptom is a furnace that lights the burners for 2–7 seconds and then shuts down, over and over (short-cycling on flame loss), often with a 'flame not sensed' lockout code. Specs: This is an OEM flame-sense rod with a porcelain insulator and a single push-on terminal. A healthy sensor passes roughly 1–6 microamps DC of flame current (measure in series with a meter set to µA). Anything under ~0.5 µA usually means the rod is fouled or the porcelain has hairline-cracked to ground. OEM vs Generic: The rod material, length, and bend matter — a generic sensor positioned wrong or made of an inferior alloy reads inconsistent microamps, causing intermittent nuisance lockouts that are maddening to diagnose. The OEM rod seats at the correct depth in the flame envelope for a stable, repeatable signal. Install — Difficulty 1/5. Tools: 1/4" nut driver, fine steel wool or emery cloth, microamp meter. Safety: TURN OFF the gas and power before servicing. Note: many 'failures' are just a dirty rod that cleans up — but a cracked insulator means replace it. 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 PG8DAA024070AAJA. 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.