Jandy | R0524300 | Pro Series Fusible Link—Vent (240 °F)

The Jandy R0524300 Vent Fusible Link is a genuine OEM safety component designed for use in Jandy Pro Series gas heaters. This fusible link acts as a critical high-temperature cut-off specifically located in the vent system, protecting the heater from unsafe exhaust temperatures.

Key Features

• OEM replacement fusible link for Jandy Pro Series heaters, part number R0524300. 

• Rated for 240 °F (approx.) operation, triggers at excessive vent/exhaust temperatures. 

• Compatible with models: JXi 200, 260, 400, Legacy LRZE, LRZM, and LXi Low NO× gas heaters. 

• Direct drop-in replacement; restores original factory safety spec for the vent limit circuit. 

• Simple, low-cost maintenance part that helps prevent heater lockouts and unsafe operating conditions.

Product Overview
The R0524300 fusible link is a key safety device mounted in the vent/combustion air stream of compatible Jandy gas heaters. If the vent temperature exceeds safe limits—often due to blocked flue, improper installation, or failed vent motor—the fusible link melts or opens, triggering a shut-down of the heater and protecting the unit from damage or safety hazards. 

Replacement is recommended if the heater has reported a "vent limit" fault code or has experienced venting issues. Because this is an OEM part, installing the R0524300 restores the heater’s original safety envelope and helps maintain warranty compliance and reliable operation.