Robertshaw 1970-024 Thermocouple

The Robertshaw 1970-024 is a professional-grade 24-inch Uni-Couple thermocouple engineered for high-reliability flame detection in standing pilot systems. Designed with a stainless steel outer jacket, this component resists heat blistering and oxidation in high-temperature combustion environments, ensuring a consistent 20 to 30 millivolt output for gas valve operation. The universal thermocouple replacement features a unique zip nut design—with rolled threads that allow the nut to be pushed, pulled, or threaded into position—making it compatible with virtually all pilot burners found in furnaces, boilers, and water heaters.

For the field technician, the 1970-024 simplifies inventory by replacing multiple fixed-mount styles. The combination of copper and nickel alloy leads provides superior electrical conductivity while minimizing resistance. This HVAC thermocouple includes a Tinnerman clip and a mica washer to insulate against shorting, ensuring a secure coaxial connection to the gas control valve. Whether you are servicing a residential fireplace or a commercial atmospheric burner, this 24" thermocouple provides the precise millivoltage needed to maintain the safety circuit and prevent nuisance pilot outages.

• Universal Compatibility: The Uni-Couple design and versatile zip nut ensure a secure fit for nearly any residential or commercial pilot assembly.
• Enhanced Durability: A stainless steel tip and outer sheath protect the internal elements from thermal fatigue and corrosive flue gases.
• Optimized Signal: Features an extended cold junction to maximize the millivolt potential, ensuring the gas valve remains energized during standard operation.
• Reliable Insulation: Integrated mica washers prevent internal shorting, maintaining electrical conductivity even under high ambient heat.

Is this thermocouple compatible with LP and Natural Gas systems?
Yes, the Robertshaw 1970-024 is rated for use with both Liquid Propane (LP) and Natural Gas (NG) applications, provided the pilot burner supports a standard threaded thermocouple mounting.

What should I check if the pilot won't stay lit after installing this part?
Verify that the thermocouple tip is properly immersed in the top 3/8" to 1/2" of the pilot flame. Ensure the coaxial connection at the gas valve is finger-tight plus a quarter turn; over-tightening can crush the mica insulator and cause a short.

Can I use this 24-inch model to replace a shorter 18-inch lead?
Yes, you can use a longer lead as long as the excess copper tubing is carefully coiled away from the flame and high-heat zones. Avoid sharp kinks, as they can damage the internal lead and increase electrical resistance.

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.