TEMPERATURE SENSOR LXI JXI
Product Overview
Fix erratic temperature readouts and sensor fault codes on Jandy heaters with an exact factory replacement probe.
The Jandy R0456500 temperature sensor kit provides the factory thermistor and harness required for proper water temperature monitoring in Jandy JXi, LXi, and Legacy series units. Because the control board relies on precise resistance mapping to govern firing cycles and high-limit safety logic, replacing a drifted or corroded probe with this genuine OEM assembly eliminates false temperature reads and sensor lockout codes without rewiring.
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Benefits & What Makes It Different
Factory OEM Resistance Calibration
Matches the board's thermistor lookup table to stop false shutoffs and prevent burner short-cycling.
Plug-and-Play Wire Harness
Includes the pre-terminated wire lead and terminal connector for direct attachment to the ignition control board.
Universal Header Fitment
Designed to seat securely inside the header thermowell pocket of Jandy JXi, LXi, and Legacy equipment.
Compatibility
- Jandy JXi Gas Pool and Spa Heaters (all sizes)
- Jandy LXi Gas Pool and Spa Heaters
- Jandy Legacy Gas Heaters and Heat Pumps
When To Use This
Pro Tip
Apply a small dab of thermal grease to the tip of the new probe before sliding it into the drywell; this eliminates air gaps and ensures the board responds immediately to actual water temperature changes.
Common Questions & Instructions
What symptoms indicate the Jandy R0456500 temperature sensor has failed?
A malfunctioning sensor typically triggers an 'OPEN SENSOR' or 'SHORTED SENSOR' error code on the control display, shows impossible water temperature values (such as 32°F or 125°F), or prevents the unit from firing entirely.
Is replacing the R0456500 temperature sensor a DIY repair?
Yes, this repair requires basic hand tools. After switching off the main electrical breaker, disconnect the sensor harness from the power distribution board, loosen the retention clamp on the header, pull the old probe, and seat the replacement.
How does water chemistry affect the life of this temperature sensor?
Prolonged exposure to low pH or high mineral scaling can corrode or insulate the metal well or probe housing, slowing thermal conductivity and causing delayed temperature readings to the logic board.
Delivered today to your DFW neighborhood
Order this item by 2 PM Central on a weekday, and we'll have it on your driveway by evening. Same-day delivery is FREE to every ZIP in our DFW coverage area — no minimum — or it's free with our weekly service plan.
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