Jandy R0457400 High-Limit Switch Harness Assembly
The Jandy R0457400 harness assembly is a genuine OEM replacement part for select Jandy / Zodiac in-ground pool and spa heaters. It serves as the high-limit switch wiring assembly that connects the heater’s overheat sensors to the control board to ensure safe operation and prevent overheating.
Key Features
- OEM high-limit switch harness — designed specifically for Jandy LXi and Legacy (LRZE/LRZM) pool- and spa-heater models.
- Protects heater system by shutting down operation if the heater exceeds safe temperature thresholds.
- Pre-wired harness simplifies replacement — plug-and-play installation for quick, reliable swap-out without needing complex rewiring.
- Durable construction — built to withstand heat and the demands of pool and spa environments.
Specifications
- Brand: Jandy / Zodiac
- Part Number: R0457400
- Type: High-Limit Switch Harness Assembly (for pool/spa heaters)
- Compatible Heater Models: Jandy LXi series (e.g. 250, 300, 400) and Legacy LRZE / LRZM series (e.g. 125, 175, 250, 325, 400)
- Includes: High-limit switch wiring harness assembly (ready for direct replacement)
Usage & Installation Notes
Use this harness when replacing a damaged or failed high-limit wiring assembly on compatible Jandy/Zodiac pool or spa heaters. Always disconnect power and gas supply before servicing the heater. Install in the original mounting location and reconnect to the control board and sensor switches. Once installed, test heater operation to confirm the high-limit safety function is restored and operational.
Why It Matters
The high-limit switch harness is a critical safety component — without a functioning harness, the heater cannot reliably detect overheating, which may lead to damage or unsafe operation. Replacing worn or faulty harnesses with the correct OEM part like R0457400 ensures continued safe, efficient heater performance.
