Reznor 134706 Flame Sensor

As a field tech, you know that a flickering signal is often the first sign of a deeper combustion issue. The Reznor 134706 Flame Sensor (Y75MK-1) is the essential OEM replacement flame sensor for maintaining signal integrity and safety in Reznor gas-fired heating systems. This rod-type sensor is engineered to provide precise flame rectification, effectively communicating with the ignition control board to prevent hazardous gas accumulation. If you are seeing short cycling or lockout codes on a Reznor unit heater, the J75MK-1D sensor is frequently the culprit due to carbon buildup or ceramic insulator degradation.

Constructed for high-temperature durability, this sensor includes the necessary mounting hardware for a direct swap. Utilizing a genuine Reznor 134706 burner sensor ensures your equipment remains within manufacturer specifications, preventing the microamp drop-offs common with generic alternatives. Whether you are performing a seasonal tune-up or an emergency repair, this HVAC flame sensor replacement is the standard for Reznor furnace troubleshooting and long-term system reliability.

• Direct OEM Fit: Exact Reznor 134706 specifications ensure a seamless installation into the burner assembly without modification.
• Verified Signal Accuracy: Prevents nuisance lockouts by providing a stable flame detection signal to the control board.
• Industrial Durability: The Y75MK-1 flame rod is designed to withstand the thermal stress found in high-demand gas furnaces and industrial heaters.
• Enhanced Safety: Critical for confirming ignition and sustaining safe combustion cycles throughout the heating season.

Why is my Reznor unit heater short cycling?
If the burner ignites but shuts off within seconds, the 134706 flame sensor may be dirty or failing to send the required microamp signal to the control board.

Can I clean the Y75MK-1 sensor rather than replace it?
While cleaning with fine-grit steel wool can temporarily restore a signal, the ceramic base often develops hairline cracks that cause electrical leakage, making a new Reznor flame sensor the only permanent solution.

What equipment is compatible with the 134706?
This component is widely used across various Reznor gas-fired units; always verify your specific model and serial number to ensure the JC-Y75MK-1D is the correct match for your ignition system.

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.