{"product_id":"pentair_42001-0053s","title":"Pentair MasterTemp \u0026 Sta-Rite Max-E-Therm Pool Heater Thermistor | 42001-0053S","description":"\u003cp\u003eThe Pentair Thermistor (42001-0053S) is the OEM replacement temperature-sensing component for Pentair MasterTemp and Sta-Rite Max-E-Therm pool heaters.\u003c\/p\u003e\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\u003cstrong\u003e⚠️ IMPORTANT: HEATER COMPONENT — PROFESSIONAL SERVICE REQUIRED\u003c\/strong\u003e\u003cbr\u003eGas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high-voltage components without proper certification.\u003c\/p\u003e\n\u003cp\u003eThe thermistor monitors water or air temperature within the heater's control circuit, providing real-time temperature data to the control board. A failed thermistor typically triggers a fault code on the heater's display and causes the unit to shut down or prevent ignition. Replacing a faulty thermistor with the correct OEM part restores accurate temperature sensing and normal heater operation.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePentair Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e42001-0053S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eThermistor (temperature sensor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePro Tip\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, locate the fault code displayed on your heater's control panel and cross-reference it with your MasterTemp or Max-E-Therm service manual to confirm the thermistor is the diagnosed component. Multiple thermistors may be present in these heater models (water temperature and outlet temperature sensors); verify the part number stamped or printed on your existing sensor matches 42001-0053S before adding to cart. Consult manufacturer documentation to confirm the specific sensor location this part number corresponds to in your unit's configuration.\u003c\/p\u003e\n\u003c!-- DRAFT STATUS --\u003e\u003c!-- wft:processed:manual:2026-03-30 --\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":53912382472467,"sku":"42001-0053S","price":83.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/PEN420010053S_0.jpg?v=1772793758","url":"https:\/\/poolaroo.com\/products\/pentair_42001-0053s","provider":"Poolaroo","version":"1.0","type":"link"}