Nordyne 632425R Pressure Switch

The Nordyne 632425R is a high-precision single pole single throw (SPST) pressure switch engineered for critical draft proving in Nordyne, Intertherm, and Miller gas-fired furnaces. This OEM replacement induction pressure switch is factory-calibrated to a -0.55" WC setpoint, ensuring the inducer motor maintains the specific vacuum required for safe flue gas venting. Designed with a 1/4" barbed connection for a secure fit to standard pressure tubing, this switch acts as a primary safety limit that prevents ignition if the combustion air blower fails or if a blockage occurs in the venting system.

For service technicians, the Nordyne 632425R offers a direct drop-in solution for aging or fouled switches, eliminating the need for field adjustments. Its robust internal diaphragm is built to withstand the rigorous cycling of residential and mobile home heating systems. Whether you are troubleshooting a furnace pressure switch stuck open error or performing a standard maintenance overhaul, this 0.55" WC combustion air switch provides the reliable electrical continuity needed to authorize the ignition sequence under proper pneumatic conditions.

• OEM Compatibility: Guaranteed fit for Nordyne, Intertherm, and Miller furnace models, including those under Maytag and Frigidaire labels.
• Precise Calibration: Fixed -0.55" WC trip point ensures the system operates within exact manufacturer safety parameters.
• Durable Construction: Features a high-quality SPST contact configuration designed for high-cycle reliability in demanding HVACR environments.
• Simplified Installation: Standard 1/4 inch barbed port and spade terminals allow for rapid field replacement and reduced labor time.

What are the symptoms of a failing Nordyne 632425R pressure switch?
Common signs include the furnace failing to ignite while the inducer motor runs continuously, or diagnostic flash codes indicating "pressure switch stuck open." This often occurs due to diaphragm fatigue or moisture buildup in the sensing line.

Can this switch replace a different water column (WC) rating?
No. Pressure switches must match the -0.55" WC specification exactly as designated by the appliance manufacturer to ensure the heat exchanger is properly scavenged before ignition.

Is the 632425R compatible with mobile home furnaces?
Yes, this part is widely utilized in Miller and Intertherm mobile home gas furnaces that require a -0.55" WC pressure switch for the draft proving 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.