OEM Carrier Furnace Flame Sensor Rod for Model PG92SAS42100CAAA

The flame sensor verifies that your Carrier PG92SAS42100CAAA furnace actually lit after the gas valve opened. It works by flame rectification: the metal rod sits in the burner flame, and the ionized flame conducts a tiny DC current back to the control board, proving combustion. If the board doesn't sense that current within a few seconds, it shuts the gas valve as a safety measure. The classic failure symptom is a furnace that lights, runs for 3–7 seconds, then drops out — often repeating several times before locking out. Most of the time the rod is simply coated with oxide and carbon buildup, but a cracked porcelain insulator or grounded rod requires replacement. This is a single Kanthal-style sensing rod with a ceramic insulator and a quarter-inch terminal. A clean, properly grounded sensor passes roughly 1–6 microamps of flame current; readings below about 0.5 µA on a meter set to DC microamps indicate a sensor or connection problem. The rod must seat fully in the flame envelope of the PG92 burner. OEM geometry matters. A generic flame sensor with the wrong rod length or bend angle may sit at the edge of the flame, producing a weak, drifting microamp signal that causes intermittent flame-loss dropouts even when the furnace is burning correctly. Genuine Carrier sensors place the rod exactly where flame ionization is strongest for a stable signal. Install difficulty: 1/5. Tools needed: 1/4" nut driver and a multimeter. SAFETY: turn off the furnace breaker before removing the sensor; never bend the rod to "adjust" it. Do not over-tighten the ceramic base. 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 PG92SAS42100CAAA. 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.