OEM Carrier Flame Sensor (48GS400192) for Model PY3PNA030040NB

This OEM Carrier flame sensor (part #48GS400192) is the factory-specified replacement for the Carrier PY3PNA030040NB gas furnace. The flame sensor is a critical safety component: after the igniter lights the burner, this rod uses ionization/rectification to confirm a live flame is present. If it cannot detect the flame — due to carbon buildup or a failed rod — the control board cuts gas within 5–8 seconds as a safety lockout, leaving your home without heat. Replacing a contaminated or failed sensor is one of the most common and cost-effective furnace repairs available.

• Part Specs: OEM Part #48GS400192 | 90° mounting bracket | Flame rod construction | Approx. 4.9" L × 1.75" H | Factory-matched electrical characteristics for accurate flame signal
• OEM vs Generic: This is a genuine Carrier OEM sensor built to exact factory tolerances. Generic sensors can have inconsistent rod coatings and off-spec signal output, causing nuisance lockouts or, worse, delayed shutoff — always choose OEM for a safety-critical part like this one.
• Install Difficulty: 2/5 — A straightforward single-wire swap accessible from the burner compartment. Tools needed: 1/4" nut driver, fine steel wool or emery cloth (to clean rod if reusing), and a multimeter to verify microamp signal post-install. Always cut power to the furnace at the breaker before servicing.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PNA030040NB gas furnace. Verify part number 48GS400192 against your unit's data plate or existing sensor before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — contact us today and get your heat back on fast.