The Carrier LH33WZ017 Flame Sensor is a critical OEM replacement part designed for precise flame rectification in high-efficiency gas-fired equipment. This furnace flame sensor features a specialized 90-degree bend and a 76-1/4 inch lead wire, ensuring a reliable connection to the Integrated Furnace Control (IFC). Engineered to withstand the intense thermal environment of the burner assembly, it accurately detects the micro-amp signal generated by the pilot or main burner flame. Professionals trust the LH33WZ017 to prevent hazardous unburned gas accumulation by signaling the control board to immediately close the gas valve if ignition failure occurs or if the flame is extinguished during a cycle. For technicians performing HVAC troubleshooting, this flame sensor electrode is the standard solution for resolving short-cycling or ignition lockout issues in compatible Carrier, Bryant, and Payne rooftop units and furnaces. Its Factory Authorized Parts status ensures exact fitment and alignment with original manufacturer tolerances for optimal combustion safety.

Key Benefits:

• Ensures high-accuracy flame rectification to maintain continuous system operation.
• Features a 76-1/4 inch lead wire and 90-degree bend for versatile installation in tight burner compartments.
• Direct OEM replacement helps eliminate furnace error codes related to flame sensing failure.
• Robust flame sensor electrode construction prevents premature oxidation and grounding issues.
• Mitigates safety risks by preventing unburned gas buildup during ignition failure.

Common Questions:

How do I test the Carrier LH33WZ017 for failure?
Technicians should measure the micro-amp (µA) signal in series with the sensor wire while the burner is lit. A reading below the manufacturer's threshold (typically 0.5 to 1.0 µA) usually indicates a fouled rod or a failing sensor that requires replacement.

What are the symptoms of a faulty flame sensor?
The most common symptom is short-cycling, where the burners ignite for 3 to 10 seconds and then shut off. This occurs when the IFC fails to receive the flame proving signal, triggering a safety lockout.

Can I clean the rod instead of replacing it?
While cleaning with a fine abrasive may temporarily restore the signal, the LH33WZ017 should be replaced if the ceramic insulator is cracked or if the metal rod shows significant pitting, as these conditions lead to intermittent HVAC system failures.

Item is Non Cancelable / Non Returnable

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.