Carrier 312926-252 Pressure Switch

The Carrier 312926-252 High Pressure Switch is a critical safety component designed for high-pressure cut-out protection in residential and commercial HVAC systems. This encapsulated pressure switch features a 670 PSI open and 470 PSI close setpoint, ensuring the compressor is shielded from excessive discharge pressures that can lead to catastrophic mechanical failure. Engineered for durability in high-vibration environments, the 312926-252 utilizes a precise SPST (Single Pole Single Throw) configuration. This HVAC pressure control is frequently utilized in R-410A refrigerant systems, providing a reliable manual or automatic reset interface depending on the specific control board logic. As an OEM Carrier replacement part, it ensures direct fitment and electrical compatibility with existing wiring harnesses, maintaining the factory-specified safety parameters for the condensing unit. Field technicians rely on this manual reset pressure switch to troubleshoot persistent high-head pressure issues and protect the system's thermal expansion valve and compressor integrity.

• Precision Calibrated Setpoints: Pre-set at 670 PSI (Open) and 470 PSI (Close) for accurate system protection.
• OEM Compatibility: Genuine replacement for Carrier, Bryant, and Payne equipment, ensuring correct thread pitch and electrical termination.
• Hermetically Sealed: The encapsulated design prevents moisture ingress and eliminates the risk of contact oxidation.
• System Reliability: Actively prevents compressor overheating and oil breakdown by interrupting the 24V control circuit during over-pressure events.

What causes this switch to trip in an R-410A system?
Common causes include a failing condenser fan motor, scaled or dirty condenser coils, or a refrigerant overcharge, all of which drive head pressure above the 670 PSI threshold.

Can this switch be used on other equipment brands?
While designed for Carrier-family brands, this switch is compatible with any system requiring a 670/470 PSI cut-out, provided the fitting and electrical ratings match the application.

Is this switch an automatic or manual reset type?
The 312926-252 is typically integrated as an automatic reset switch, but system behavior depends on the logic of the defrost board or furnace control module it is wired into.

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.