Nordyne 632520R Pressure Switch

The Nordyne 632520R Pressure Switch is an essential safety component for gas furnace maintenance and repair. This OEM replacement part is a Single Pole Single Throw (SPST) switch factory-set to -0.80" WC. It serves as a critical draft proving switch, ensuring that the inducer motor is pulling the correct vacuum through the heat exchanger before allowing the ignition sequence to proceed. As a veteran-grade HVAC induction component, the 632520R is a direct, identical match for the Nordyne 632520, making it the primary choice for HVAC technician parts when troubleshooting a pressure switch open fault code.

Engineered for high-cycle reliability in residential equipment, this vacuum switch is compatible with a wide range of Nortek Global HVAC brands, including Intertherm, Miller, Frigidaire, and Maytag. The -0.80" water column set point is calibrated for precise combustion air proofing, protecting the system from hazardous flue gas recirculation or vent blockage issues. When facing a "two-flash" error on the control board, installing this furnace safety sensor ensures that the ignition system only engages when proper flue pressure is maintained, preventing short cycling and mechanical failure.

• Universal Compatibility: Direct OEM crossover for part number 632520, fitting multiple M1M and MG1 series furnaces.
• Precise Set Point: Calibrated to -0.80" WC for accurate inducer motor vacuum detection and system safety.
• Reliable SPST Logic: Simplified normally open (NO) design provides clear continuity signaling for rapid diagnostics.
• Rugged Housing: Built to withstand the high-temperature environment of the furnace burner compartment.

• Why is my furnace flashing a 2-flash code? This usually indicates the pressure switch is open while the inducer is running. Check for clogged pressure ports, cracked tubing, or a failing inducer assembly before replacing the switch.
• Is the 632520R compatible with older 632520 models? Yes, the 632520R is the direct factory-identical replacement for the obsolete 632520 part number.
• What happens if the pressure switch set point is wrong? Using a switch with a different WC rating can lead to dangerous combustion issues or frequent lockout codes. Always match the OEM specification of -0.80" WC.

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.