{"product_id":"pentairmastertemppoolheatertransformer115230v420010107spen420010107s","title":"Pentair MasterTemp Pool Heater Transformer, 115\/230V | 42001-0107S","description":"\u003cdiv\u003e\n  \u003ch2\u003ePentair Dual Voltage Transformer Kit for MasterTemp® \u0026amp; Max-E-Therm® Heaters | 42001-0107S\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Pentair \u003cstrong\u003e42001-0107S\u003c\/strong\u003e is an OEM \u003cstrong\u003edual voltage transformer kit\u003c\/strong\u003e used in the electrical system of select\n    Pentair \u003cstrong\u003eMasterTemp\u003c\/strong\u003e and Sta-Rite \u003cstrong\u003eMax-E-Therm\u003c\/strong\u003e pool\/spa heaters. This transformer converts incoming\n    \u003cstrong\u003e115V or 230V\u003c\/strong\u003e line power to the proper low-voltage required by the heater control circuitry for safe, reliable operation.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDual voltage (115\/230V):\u003c\/strong\u003e supports heaters wired for either 115V or 230V supply (as configured by the heater wiring diagram).\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM replacement kit:\u003c\/strong\u003e designed for correct fit, mounting, and electrical characteristics in compatible heaters.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRestores stable control power:\u003c\/strong\u003e helps resolve issues caused by a failed or weak transformer (no power to controls, intermittent operation, erratic display, or control faults).\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eService-friendly replacement:\u003c\/strong\u003e replaces the transformer assembly without needing to replace the entire control board.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUsed on:\u003c\/strong\u003e Pentair \u003cstrong\u003eMasterTemp\u003c\/strong\u003e heater electrical systems (where the parts diagram calls for \u003cstrong\u003e42001-0107S\u003c\/strong\u003e)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUsed on:\u003c\/strong\u003e Sta-Rite \u003cstrong\u003eMax-E-Therm\u003c\/strong\u003e heater electrical systems (where the parts diagram calls for \u003cstrong\u003e42001-0107S\u003c\/strong\u003e)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cem\u003eTip:\u003c\/em\u003e Confirm your heater model and revision by referencing the heater data plate and parts list before ordering.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Symptoms of a Failing Transformer\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eHeater control panel\/display is blank or will not power up\u003c\/li\u003e\n    \u003cli\u003eIntermittent resets, flickering display, or random control faults\u003c\/li\u003e\n    \u003cli\u003eHeater will not ignite due to loss of proper low-voltage control power\u003c\/li\u003e\n    \u003cli\u003eBurnt smell, heat discoloration, or visible damage on the transformer assembly\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eSpecifications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Pentair\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 42001-0107S\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Transformer kit (heater electrical system)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInput:\u003c\/strong\u003e 115V \/ 230V (heater-configured)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Pool \u0026amp; spa gas heater control power (MasterTemp \/ Max-E-Therm)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 kit\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTurn off power at the breaker\u003c\/strong\u003e before opening the heater and servicing electrical components.\u003c\/li\u003e\n    \u003cli\u003eVerify the heater is configured for the correct incoming voltage (115V vs 230V) before reconnecting wiring.\u003c\/li\u003e\n    \u003cli\u003eTransfer wires one at a time and confirm all connections are fully seated and secure.\u003c\/li\u003e\n    \u003cli\u003eAfter installation, restore power and confirm the control panel powers up and the heater runs normally.\u003c\/li\u003e\n    \u003cli\u003eElectrical service should be performed by a qualified technician.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=42001-0107S\"\u003eSearch Aqua Pool Supply for 42001-0107S\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=MasterTemp%20parts\"\u003ePentair MasterTemp heater parts\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=Max-E-Therm%20parts\"\u003eSta-Rite Max-E-Therm heater parts\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=heater%20igniter\"\u003eHeater igniters\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=heater%20pressure%20switch\"\u003eHeater pressure switches\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=heater%20thermistor\"\u003eHeater thermistors \u0026amp; temperature sensors\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=heater%20gasket\"\u003eHeater gaskets \u0026amp; seals\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eMaintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eKeep the heater area dry and ensure the cabinet is properly closed to reduce corrosion on electrical components.\u003c\/li\u003e\n    \u003cli\u003eUse proper bonding\/grounding and correct breaker sizing to help protect electronics from voltage issues.\u003c\/li\u003e\n    \u003cli\u003eIf you experience repeated electrical failures, verify supply voltage stability and inspect for water intrusion or rodent damage.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52589951254844,"sku":"42001-0107S","price":53.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/pentair-mastertemp-pool-heater-transformer-115230v-42001-0107s-heater-parts-9248792.jpg?v=1771561345","url":"https:\/\/aquapoolsupply.com\/products\/pentairmastertemppoolheatertransformer115230v420010107spen420010107s","provider":"Aqua Pool Supply","version":"1.0","type":"link"}