R0329400 | Jandy Exhaust Temp Limit Switch for LX and LT Heaters

OEM Jandy Exhaust Temperature Limit Switch R0329400 is a key safety component designed to monitor exhaust temperatures in Jandy LX and LT pool and spa heaters. This switch protects the unit by shutting down the heater if exhaust temperatures rise above safe levels, preventing overheating and system damage. Compatible with models such as LX250, LX400, LT250, and LT400, it is built for durability and OEM precision. Installing this part helps extend equipment life and maintain consistent, safe operation throughout the heating season.

Highlights

• Monitors Exhaust for Overheating: Detects when exhaust temperatures exceed safety thresholds and immediately shuts the system down to prevent damage

• Prevents Thermal System Failure: Helps avoid damage to heat exchangers, electronics, and other components by keeping exhaust temps under control

• Compatible with LX and LT Heaters: Designed for use with Jandy models LX250, LX400, LT250, and LT400, providing a reliable fit and performance

• Promotes Long-Term Heater Safety: Acts as a fail-safe mechanism that helps maintain safe operation during extended or high-demand heating cycles

• OEM Construction for Tough Environments: Manufactured to Jandy’s specifications to ensure performance under poolside heat and moisture exposure

Includes

• (1) Exhaust Temp Limit Switch
• (2) Screws

Compatibility

• Jandy LX Heater Models: LX250, LX400
• Jandy LT Heater Models: LT250, LT400

Note: This Exhaust Temp Limit Switch may be compatible with your system, please refer to your owners manual to ensure compatibility.

Additional Info

R0329400 Exhaust Temp Limit Switch – Overheat Protection for LX & LT

R0329400 shuts off Jandy heater if exhaust temp exceeds safe limits

essential safety part for LX250, LX400, LT250, and LT400 models

install R0329400 when heater shuts down due to exhaust overheating

switch helps prevent internal damage from blocked flue or vent

used in routine service to maintain combustion chamber safety

Jandy Heater Exhaust Sensor R0329400 – Monitors High Flue Temps

part R0329400 detects excessive exhaust heat in Jandy gas heaters

shuts down burner if vent pipe heat rises too high

compatible with LT and LX series pool and spa heaters

faulty switch? Replace R0329400 to restore system protection

includes screws for secure mounting to heater housing

Pool Heater Exhaust Limit Switch R0329400 – OEM Safety Component

R0329400 is required when vent temps exceed factory tolerances

restore system shutoff accuracy with genuine part R0329400

heater short cycling or locked out? R0329400 may need replacing

protects heat exchanger, wiring, and ignition components

use in both residential and commercial Jandy systems