R0457400 | Jandy High Limit Switch Harness for LXi and LRZE Heaters

OEM Jandy High Limit Switch Harness R0457400 is a key electrical component used in Jandy LXi and LRZE pool and spa heaters. This harness connects the high limit switches directly to the control board, enabling proper safety communication within the system. It plays a crucial role in ensuring the heater shuts off when unsafe temperatures are detected, preventing overheating and equipment damage. Built to Jandy OEM standards, it guarantees durability, long-term reliability, and easy integration into supported models. Replacing a worn or damaged harness restores accurate safety operation and ensures continued heater performance.

Highlights

• Critical Electrical Link for Safety: Transfers signals between the high limit switches and the control board to ensure accurate temperature protection and system shutdown

• Protects Against Overheating Risks: Supports the heater’s built-in safety features by allowing real-time response when temperatures rise above safe thresholds

• Compatible with LXi and LRZE Heaters: Designed for seamless use in Jandy’s LXi and LRZE models, offering a direct fit and quick replacement

• OEM-Approved Construction: Made with high-grade materials and tested to meet factory standards for insulation, signal reliability, and long-term durability

• Simple, Direct Replacement Part: Ideal for restoring full safety functionality in your heater, with a hassle-free installation that keeps your system running smoothly

Includes

• (1) High Limit Harnes
• (2) Cut Washers

Compatibility

• Jandy LXi Heaters
• Jandy Legacy LRZE Heaters

Additional Info

R0457400 High Limit Harness – Electrical Safety Link for Jandy Heaters

R0457400 connects high limit switches to control board in Jandy heaters

prevents overheating by relaying temp cutoff signals properly

compatible with LXi and Legacy LRZE pool and spa heaters

install R0457400 when heater shuts off without known error

ensures safety shutdown signal is delivered without interruption

Jandy Heater Wire Harness R0457400 – For High Limit Switch Control

part R0457400 relays overheat sensor signals to heater logic board

fits LXI250, LXI400, LRZE125, and LRZE400 heater models

protects heater from over-temp conditions by completing circuit

replace if original harness is damaged, corroded, or loose

supports heater safety loop and digital interface diagnostics

Pool Heater Limit Harness R0457400 – OEM Electrical Connection Kit

factory harness for restoring communication with overheat sensors

R0457400 installs between high-limit sensors and Jandy PCB

fix intermittent shutoffs caused by loose or broken wires

use during rebuilds, maintenance, or circuit troubleshooting

harness includes cut washers for proper terminal connections

Diagram