Mitsubishi Electric e279a3391 R454B Refrigerant Sensor

Product Description

The MITSUBISHI ELECTRIC e279a3391 is an R454B refrigerant sensor designed for use in modern HVAC systems utilizing R454B as the working refrigerant. This sensor monitors refrigerant presence or concentration within the system, supporting safe and code-compliant operation. It is typically installed by licensed HVAC technicians working on systems that have transitioned to lower global warming potential (GWP) refrigerants as part of updated environmental standards. The e279a3391 is an OEM component sourced directly from MITSUBISHI ELECTRIC for reliable, manufacturer-specified performance.

This sensor is intended for HVAC systems charged with R454B refrigerant, a lower-GWP A2L refrigerant blend increasingly common in residential and light commercial applications. It is suited for installation in split systems, multi-zone systems, and other HVAC configurations where R454B is the designated refrigerant. Technicians working on MITSUBISHI ELECTRIC equipment will recognize this as a factory-specified replacement or service component for applicable units.

Key Features

• Designed specifically for use with R454B refrigerant
• OEM MITSUBISHI ELECTRIC component for manufacturer-grade fitment
• Supports safe system operation in compliance with current refrigerant handling standards
• Suitable for residential and light commercial HVAC systems

Compatibility

Designed as an OEM-style replacement sensor for MITSUBISHI ELECTRIC HVAC systems utilizing R454B refrigerant. Consult equipment documentation or MITSUBISHI ELECTRIC service resources to confirm fitment for a specific unit.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with A2L refrigerant handling procedures and applicable local codes. Power down the unit and recover refrigerant per EPA Section 608 requirements before accessing refrigerant-side components. Follow MITSUBISHI ELECTRIC service documentation for proper sensor placement and wiring procedures. Verify system integrity and check for leaks after installation before returning the unit to operation.