Four Seasons 20978 HVAC Binary Switch

Overview of Four Seasons Pressure Switch 20978

The Four Seasons Pressure Switch 20978 is designed for precise pressure monitoring in automotive HVAC systems. Specifically compatible with Nissan Pulsar NX and Sentra models, this system-mounted binary switch ensures reliable operation within specified pressure ranges.

• Rectangular female connector for secure electrical connection
• Steel construction for durability and corrosion resistance
• Female fitting with 3/8 in. x 24 thread size for system mounting
• Operates between 32 psi (off) and 35 psi (on) for accurate pressure control
• Two-terminal design for straightforward integration
• White color housing for easy identification
• Meets or exceeds OEM specifications for Nissan Pulsar NX and Sentra

Four Seasons Pressure Switch Product Line Details

The Pressure Switch line by Four Seasons focuses on HVAC binary switches that provide reliable pressure sensing and system control. This product line is engineered to meet OEM standards, ensuring compatibility and performance in automotive air conditioning systems. The 20978 model exemplifies this with its system-mounted design and precise pressure operation points, making it suitable for Nissan vehicles requiring dependable HVAC pressure monitoring.

Detailed Product Description

The Four Seasons Pressure Switch 20978 features a rectangular female connector and a female fitting with a 3/8 in. x 24 thread size, allowing for secure and proper installation in the HVAC system. Constructed from steel, the switch offers durability and resistance to wear. It operates as a binary switch, opening at 32 psi and closing at 35 psi, which helps maintain optimal pressure levels within the system. The white color housing aids in quick identification during maintenance or replacement. This pressure switch is system-mounted, ensuring it integrates seamlessly with the vehicle's HVAC components.

Common Applications and Issues Addressed

• Regulates pressure in Nissan Pulsar NX and Sentra HVAC systems
• Prevents compressor damage due to low or high pressure
• Helps maintain consistent air conditioning performance
• Addresses HVAC system pressure faults and cycling issues
• Ensures proper system shutdown to avoid component failure

Installation Notes and Tips

• Verify compatibility with Nissan Pulsar NX or Sentra before installation
• Ensure system is depressurized prior to removal of old switch
• Use appropriate tools to avoid damaging the 3/8 in. x 24 threaded fitting
• Check electrical connections for secure fit with the rectangular female connector
• Test system pressure after installation to confirm proper operation

Quality Assurance and Warranty

The Four Seasons Pressure Switch 20978 meets or exceeds OEM specifications, providing assurance of quality and reliability. Manufactured with steel materials and designed for system-mounted installation, this switch is built to last under normal operating conditions. Warranty details should be confirmed with the product documentation or supplier.