Bradford White 239-45460-00 Pressure Switch

The Bradford White 239-45460-00 Pressure Switch is a critical safety component designed for power vented water heaters, specifically within the Defender Safety System series. This SPST (Single Pole Single Throw) switch features a precise 0.75" WC (Water Column) set point, ensuring the inducer motor establishes proper draft before allowing the ignition sequence to proceed. Engineered with a 1/4" barbed vacuum connection, it monitors the differential pressure to prevent operation during venting obstructions or blower failure. When troubleshooting Bradford White pilot codes or ignition failure, this OEM replacement eliminates pressure fluctuations often found in generic alternatives. It is compatible with RG2PV service parts and various ultra-low NOx models. Contractors should verify the vacuum hose integrity and millivolt circuit continuity when installing this factory-authorized sensing device to restore system efficiency and safety compliance.

• OEM Precision: Guaranteed 0.75" WC trip point prevents nuisance lockouts common with sub-standard universal switches.
• Direct Fit: Features standard 1/4 inch barbed ports and spade terminals for rapid field replacement on Bradford White power vent units.
• Safety Compliance: Ensures the combustion blower is moving sufficient air to vent flue gases safely.
• Durability: Constructed to withstand high-cycle operations in residential and commercial hot water systems.

What does the 0.75" WC rating signify?
This is the specific pressure threshold at which the internal diaphragm closes the electrical circuit. If the blower does not pull at least 0.75" Water Column, the Bradford White pressure switch remains open, preventing the gas valve from energizing.

Can I use this switch on other water heater brands?
While the SPST contact and 1/4 barbed fitting are common, the 0.75" WC set point is calibrated specifically for Bradford White blower assemblies. Always match the WC rating on the part label to ensure safe ventilation exhaust.

What causes this pressure switch to fail?
Common issues include a clogged vent pipe, a failing inducer motor, or moisture buildup in the vacuum tubing, all of which prevent the switch from closing the 24V or millivolt circuit.

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.