Carrier 328270-407 Tube

The Carrier 328270-407 Tube Pressure Switch is a critical safety and operational component designed for Carrier, Bryant, and Payne induced-draft furnaces. This OEM HVAC pressure switch functions as a differential pressure sensor, ensuring that the inducer motor is creating sufficient draft for safe combustion before the ignition sequence begins. Engineered to replace failing or intermittent switches in high-efficiency gas furnaces, the 328270-407 prevents the system from cycling or locking out due to restricted venting, heat exchanger issues, or blocked condensate lines. As a genuine Carrier replacement part, it meets precise factory set-points for opening and closing pressures, maintaining the integrity of the safety circuit. For contractors performing furnace troubleshooting, this direct-fit tube pressure switch eliminates the calibration variables often associated with universal aftermarket components, ensuring reliable HVAC system performance and safety code compliance.

Technical Benefits for Contractors

• Optimized Pressure Set-points: Factory-calibrated for specific Carrier draft inducer requirements to prevent nuisance trips and intermittent error codes.
• High-Grade Diaphragm: Constructed with high-heat resistant materials to withstand the thermal demands and corrosive environment of furnace flue gases.
• Direct Plug-and-Play Compatibility: Features standard spade terminals and tubing connections for rapid field replacement during service calls.
• OEM Safety Compliance: Ensures the furnace operates within the original manufacturer’s safety parameters, protecting the heat exchanger from overheating conditions.

Common Questions

What are the symptoms of a faulty Carrier 328270-407 pressure switch?
Common signs include the furnace failing to ignite, an LED diagnostic code indicating a pressure switch stuck open or closed, and the inducer fan running continuously without the burners firing.

Can I use a universal pressure switch instead of the 328270-407?
While universal switches exist, they often require manual calibration. This OEM pressure switch is pre-set to the exact WC (Water Column) requirements of your specific Carrier model, ensuring the safety circuit engages exactly when required.

Does this switch address "Pressure Switch Stuck Open" errors?
Yes, if the internal diaphragm is failing or the electrical contacts are pitted, replacing the unit with a 328270-407 will typically resolve those specific diagnostic faults, provided the venting and inducer motor are functioning correctly.

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.