First Company E322 Thermal Fuse Link

Description

First Company E322 Thermal Fuse Link

The First Company E322 Thermal Fuse Link is an OEM replacement safety component designed for use in First Company air handlers and fan coil units. Thermal fuse links serve as a critical one-time-use overcurrent and overtemperature protection device, interrupting the electrical circuit when unsafe temperature thresholds are exceeded — helping to prevent equipment damage, component failure, and potential fire hazards.

Product Overview

This thermal fuse link is engineered to meet the original equipment specifications of First Company HVAC systems. When the surrounding temperature rises beyond the fuse link’s rated threshold, the internal element melts and permanently opens the circuit, signaling the need for inspection and replacement. Unlike resettable limit switches, a blown thermal fuse link must be replaced to restore normal operation — making it an essential item to keep on hand for service calls.

Key Features

• OEM First Company replacement thermal fuse link
• Provides one-time thermal overprotection for air handler and fan coil applications
• Permanently opens circuit upon reaching rated temperature threshold
• Helps prevent equipment damage from overheating conditions
• Direct replacement for compatible First Company units — SKU E322
• Supports safe, code-compliant HVAC system operation

Application

• Compatible with First Company air handlers and fan coil units requiring E322 thermal fuse link replacement
• Suitable for residential and light commercial HVAC installations

Important Service Note

A thermal fuse link that has opened (blown) indicates the unit experienced an overtemperature condition. Always diagnose and correct the root cause — such as a failed blower motor, restricted airflow, or faulty limit control — before installing a replacement fuse link.