Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.
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This OEM Carrier flame sensor (LH33Z001) confirms the presence of burner flame during each heating cycle on your Carrier GB3AAV036075ABJA gas furnace. Mounted in the flame path, the rod sends a small microamp signal back to the control board to prove ignition; if flame isn't sensed, the board safely closes the gas valve. Over time the sensor builds up oxidation or cracks, causing the furnace to light briefly then shut down—a classic short-cycling no-heat symptom. This direct-fit replacement matches the factory specification for the GB3AAV036075ABJA, with the correct rod length and mounting orientation for proper sensing. Installation is easy and takes about 15 minutes with one mounting screw and a single spade connector—no special tools needed. Always shut off power at the breaker before servicing the burner area. Restore steady, safe ignition and eliminate frustrating lockouts with a genuine Carrier flame sensor. In stock and ships same-day when you order before 3PM CST.
This part is compatible with Carrier model GB3AAV036075ABJA.
Same-day shipping before 3 PM CST. 30-day returns on uninstalled parts.