Check the listing for details. Generic Replacement for Hayward® H-Series® Low Nox Thermistor - Part IDXLTER1930. Color: Red, Condition: New. Listed at 21.99 USD. If the temperature on your control panel’s display is showing an incorrect temperature, your thermistor may need to be replaced. Thermistors often display a temperature that is much too high when they reach the end of their lifespan. Fix this issue easily by replacing your worn-out thermistor temperature sensor with this Optimum replacement thermistor. This replacement for the Hayward Thermistor is for use with H-Series Electronic ED2 Style, Low Nox Induced Draft Heaters. Hayward® H-Series® Low Nox Thermistor - Replacement Features: Features • Compatibility: H-Series Electronic ED2 Style, Low Nox Induced Draft Heaters, H250IDL2/H350IDL2/H400IDL2 Pool and Spa/Hot Tub Heaters, Electronic Ignition H150/H200/H210/H250/H300/H350/H400 Pool and Spa/Hot Tub Heaters Specifications • Replaces: IDXLTER1930 • Manufacturer: Optimum Pool Technologies, Inc • Model: OPT-1930T