Amana-Goodman 20028401 Pressure Switch

The Amana-Goodman 20028401 Pressure Switch is a critical safety component designed for specific high-efficiency furnace applications. This SPST (Single Pole Single Throw) inducer pressure switch is factory-calibrated to a -1.35" WC set point, ensuring precise monitoring of the combustion air blower's static pressure. Built for durability in demanding HVAC environments, it features a standard 1/4" barb connection for secure pneumatic tubing attachment and 3/16" male spade terminals for electrical integration. As an OEM replacement pressure switch, the 20028401 ensures your Goodman or Amana furnace maintains proper draft verification before the ignition sequence initiates. Failure to use the exact water column rating specified by the manufacturer can lead to nuisance trips or unsafe operating conditions. This genuine Goodman furnace part is engineered to meet the exact tolerances required for consistent performance throughout the heating season.

• Precise Calibration: Fixed -1.35" WC trip point ensures accurate vacuum sensing and burner safety.
• Industry Standard Connections: Features a 1/4" hose barb and spade terminals for straightforward field installation.
• OEM Compatibility: Designed specifically for Amana and Goodman gas furnaces, maintaining the unit's original ETL/UL certification.
• Reliable Switching: High-quality internal diaphragm and contacts prevent premature failure caused by heat or moisture.

Commonly Asked Questions

What causes a furnace pressure switch to stay open?
An open switch usually indicates a restricted flue, a failing inducer motor, clogged condensate lines, or a cracked heat exchanger. Always verify the draft with a manometer before replacing the 20028401.

Can I use a switch with a different "WC rating?
No. Pressure switches are safety devices. Installing a switch with a different set point, such as -1.25" or -1.45", can result in improper combustion or failure to detect a blocked vent.

How do I test the 20028401 pressure switch?
Using a multimeter set to continuity, check for a closed circuit across the terminals when the inducer motor is running and the required vacuum pressure is reached.

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.