Resideo Q340A1066 Thermocouple

The Resideo Q340A1066 is a professional-grade Universal 30mV Thermocouple designed for high-reliability pilot flame sensing in standing pilot gas-fired heating systems. This 18-inch thermocouple features a heavy-duty construction with a focus on Maximum Copel content to ensure long-term durability and consistent millivolt generation. When the pilot flame contacts the tip, the resulting temperature differential produces a stable 26mV-32mV open circuit output, providing the necessary DC power to hold the safety valve open. With a low 0.02 Ohms resistance and a standard 11/32-32 male connector nut, this unit integrates seamlessly with Pilotstat safety control power units. The package includes a push-in clip and adapter assembly, making it a versatile Honeywell thermocouple replacement for a wide range of residential and commercial furnace burners.

• Universal Compatibility: Includes an adapter and push-in clip to fit various pilot burner configurations, reducing the need for multiple truck stock items.
• Consistent Voltage Output: Delivers a reliable 30mV nominal output (26mV to 32mV range) to ensure stable burner operation and safety shut-off performance.
• Professional Construction: Built with high-quality materials to resist oxidation and withstand temperatures from 780°F to 1400°F.
• Easy Installation: The 18" lead length and 11/32-32 male nut facilitate quick connections to Pilotstat controls without lead tension issues.
• Optimized Resistance: Low 0.02 Ohms internal resistance ensures maximum efficiency in the thermoelectric circuit.

Is the Q340A1066 compatible with older Honeywell standing pilot systems?
Yes, as a universal gas furnace thermocouple, it is designed to replace most 30mV residential thermocouples using the included multi-fit adapters.

What should I check if my pilot won't stay lit after installing this thermocouple?
Ensure the 11/32-32 male connector nut is hand-tightened plus a 1/4 turn into the gas valve. Also, verify that the pilot flame is engulfing the top 1/2" to 1" of the thermocouple tip to generate the required 30mV output.

Can this thermocouple be used for water heaters or just furnaces?
While primarily used for furnaces, it can be used in any pilot burner application requiring an 18-inch 30mV thermocouple, provided the connector nut and mounting hardware match the existing assembly.

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.