Bradford White 233-46700-00 Thermopile

The Bradford White 233-46700-00 is an OEM 750mv thermopile designed for high-performance gas-fired appliances requiring powerpile generator output. This component is functionally identical to the Honeywell Q313A1248 and is engineered to convert thermal energy from the pilot flame into a millivolt electrical current sufficient to operate the main gas valve without an external power source. It features a heavy-duty thermopile lead construction with high-temperature insulation to withstand harsh combustion environments. Field technicians should verify this part for systems utilizing a self-powered gas control valve, commonly found in commercial and residential atmospheric water heaters. The 39-inch lead length ensures versatile routing within the combustion chamber, maintaining a stable 750 millivolt signal to prevent nuisance lockouts. Proper alignment with the pilot assembly is critical to achieving the required temperature differential for optimal millivolt system operation.

• Universal Compatibility: Direct replacement for several Honeywell and Bradford White 750mV configurations.
• High-Output Signal: Consistently generates the necessary 750 millivolts for reliable gas valve actuation.
• Durable Construction: Built with robust hardware to resist oxidation and carbon buildup on the sensing tip.
• OEM Precision: Meets exact factory specifications for resistance and thermal response times.

Common Technical Questions

What causes a 750mV thermopile to fail in a water heater?
Failure is typically caused by excessive carbon deposits, an oxidized outer sheath, or high resistance in the lead wires. If the pilot flame is steady but the millivolts drop under load, a replacement is necessary.

Is the 233-46700-00 compatible with Honeywell Q313A assemblies?
Yes, this unit is a direct cross-reference for the Q313A1248, ensuring seamless mechanical and electrical integration into existing pilot burner brackets.

What should the open-circuit millivolt reading be?
A healthy Bradford White 233-46700-00 should produce between 650mV and 850mV on an open-circuit test with a proper pilot flame engulfing the top 1/2 of the element.

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.