Specification Brand : Pentair BulletPoint1 : The heater is equipped with two Stack Flue sensors one for each heat exchanger. BulletPoint2 : These sensors monitor the stack flue temperature and if needed will shut down the heater if the stack flue temperature exceeds 170° F (77° C). BulletPoint3 : Compatible Replacement for Minimax NT STD, NT LN, NT TSI Model 200, 250, 300, 400 BulletPoint4 : Also Compatible Replacement for MiniMax CH pool and spa heater models 150 IID, 150, 200, 250, 300, 350, 400 BulletPoint5 : NOTE: This is a compatible aftermarket replacement part. The manufacturers' names and part numbers have been used for reference purposes only. Optimum Pool Technologies Inc is an independent brand. Color : almond CustomerPackageType : Standard Packaging ExternallyAssignedProductIdentifier1 : 788379878115 ExternallyAssignedProductIdentifier2 : 0788379878115 ExternallyAssignedProductIdentifier3 : 00788379696160 ItemDisplayDimensions_Height : 1.9 inches ItemDisplayDimensions_Length : 6.4 inches ItemDisplayDimensions_Width : 2.8 inches ItemDisplayWeight : 1 pounds ItemName : Pentair 475601, almond ItemPackageDimensions_Height : 1.9 inches ItemPackageDimensions_Length : 6.4 inches ItemPackageDimensions_Width : 2.8 inches ItemPackageQuantity : 1 ItemTypeKeyword : swimming-pool-heater-and-heat-pump-parts ItemTypeName : 475601 Manufacturer : PENTAIR WATER POOL AND SPA, IN Material : Rubber ModelName : 475601 ModelNumber : 475601 NumberOfBoxes : 1 NumberOfItems : 1 PackageLevel : unit PartNumber : 475601 PowerSourceType : manual ProductDescription : This Compatible Repalcement for 471587 High Limit Switch is an important switch in your MiniMax NT pool heater, and is used to detect when your water temperature has exceeded a safe level (115°F). You MiniMax NT heater will indicate when it is time to replace the High Limit Switch when the “SERVICE” LED is displayed. It also may be time to replace your MiniMax NT High Limit Switch if all 3 lights on the back of the control board are on and one or both of the switches shows an open circuit (given proper water flow through the heater). SupplierDeclaredDgHzRegulation : not_applicable Voltage : 230 volts