Bradford White 233-46670-00 Thermopile

The Bradford White 233-46670-00 is an OEM 750mv thermopile designed for high-recovery commercial and residential gas water heaters. This pilot generator features a 2-wire lead configuration and is a direct, identical replacement for the Honeywell Q313A1247. In the field, this component is critical for generating the millivoltage required to power the electromagnetic coil in the gas control valve without an external power source. When troubleshooting water heater pilot lights that fail to stay lit or produce insufficient millivoltage, this thermopile replacement ensures stable millivolt output and reliable gas valve actuation. Built for durability in high-heat environments, the 233-46670-00 maintains the integrity of the pilot assembly, preventing nuisance outages and ensuring consistent burner ignition. For technicians, using this Bradford White 233-46670-00 thermopile ensures exact fitment and electrical compatibility, meeting original equipment specifications for safety and performance.

Key Benefits

• Broad Compatibility: Functions as a direct cross-reference for the Honeywell Q313A1247, ensuring seamless integration with existing gas valves.
• Optimal Millivolt Output: Engineered to provide a consistent 750mv signal to ensure the gas safety valve opens and stays open during operation.
• Heavy-Duty Construction: Designed with high-temperature lead insulation to withstand the thermal stress common in standing pilot systems.
• Simplified Installation: The 2-wire lead design uses standard spade terminals for quick connection to the terminal block.

Common Questions

How do I test the Bradford White 233-46670-00 using a multimeter?
Set your multimeter to the DC millivolt scale. Check the open-circuit voltage by connecting the leads to the thermopile wires while the pilot is burning. You should see a reading between 650mv and 850mv. If the reading is below 400mv under load, the component requires replacement.

Will this thermopile work with LP (Propane) and Natural Gas units?
Yes, this 750mv pilot generator is compatible with both fuel types, provided the pilot burner orifice is correctly sized for the specific gas being used.

What causes a 2-wire thermopile to fail prematurely?
The most common causes are carbon buildup on the element, improper pilot flame impingement, or excessive heat at the wire junction. Ensure the pilot flame envelopes the top 1/2 to 1 inch of the thermopile tip for maximum longevity.

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.