Product Specifications: Type: Pool Heater Parts Name: Pool Temperature Sensor Compatible with: Raypak Pool Heaters Manufacturer Part Number: 009577F Package Includes:1*Pool Temperature Sensor Pool Temperature Sensor Compatible with the following models: Compatible with Raypak / Rheem Above Ground Heaters: P-R156A-AN-C, P-R156A-AP-C Compatible with Raypak / Rheem Digital Heaters, Electronic Ignition: P-R206A-EN-C, P-R206A-EP-C, P-R266A-EN-C, P-R266A-EP-C, P-R336A-EN-C, P-R336A-EP-C, P-R406A-EN-C, P-R406A-EP-C Compatible with Raypak / Rheem Digital Heaters, Electronic, Salt Water: P-R206A-EN-X, P-R206A-EP-X, P-R266A-EN-X, P-R266A-EP-X, P-R336A-EN-X, P-R336A-EP-X, P-R406A-EN-X, P-R406A-EP-X Compatible with Raypak / Rheem Digital Low NOx: Q-R207AL-EN-C, P-R267AL-EN-C, P-R337AL-EN-C, P-R407AL-EN-C Pool Temperature Sensor Features: 1. Pool temperature sensor prompts pool heaters to turn on or off and prevents vital components from overheating 2. The most affordable and easy to install, replace the old pool temperature sensor for raypak heater that failed or damaged 3. Ensure that the heater is working properly, so that the pool water more comfortable 4. Allow your heater to be better maintained, providing consistent and reliable performance Pay Attention: Please check the "Part Number" listed on the product page before ordering. If the temperature reading is inaccurate, check the resistance value at the given temperature provided in the heater user manual, please replace the board if it is within 10% of the value shown