Description
Marvair 70343 High Pressure Switch — 450 PSIG Close
The Marvair 70343 is a factory-specified high pressure switch designed to protect refrigeration and HVAC systems from damaging over-pressure conditions. With a close setpoint of 450 PSIG, this switch provides reliable circuit protection by monitoring system refrigerant pressure and responding swiftly to unsafe pressure levels — helping prevent compressor damage and system failure.
Key Features
- Close setpoint: 450 PSIG for precise high-pressure protection
- Designed as a genuine Marvair OEM replacement part (SKU: 70343)
- Protects compressors and refrigerant circuits from over-pressure conditions
- Direct-replacement fit for compatible Marvair HVAC and packaged terminal equipment
- Supports reliable, long-term system performance and uptime
Application
This high pressure switch is engineered for use in Marvair packaged HVAC systems where refrigerant pressure monitoring is critical. It is an essential safety component that interrupts the control circuit when refrigerant pressure reaches the 450 PSIG close threshold, safeguarding the compressor and refrigerant circuit from catastrophic over-pressure events.
Why Choose OEM Marvair Parts?
Using genuine Marvair replacement components ensures proper fit, reliable operation, and maintained equipment warranties. The 70343 is built to Marvair’s exact specifications for seamless integration into your existing system.







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