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Pentair MasterTemp Pool Heater Thermistor | 42001-0053S

Pentair SKU: 42001-0053S
Pentair MasterTemp Pool Heater Thermistor | 42001 - 0053S - Heater Parts - img - 1
Pentair Mastertemp & Max - E - Therm Thermistor 42001 - 0053S - Heater Parts - img - 1
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Pentair MasterTemp Pool Heater Thermistor | 42001 - 0053S - Heater Parts - img - 1
Pentair Mastertemp & Max - E - Therm Thermistor 42001 - 0053S - Heater Parts - img - 1
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ETi 400 Heater Not sure it fits? See this part on the interactive diagrams ETi 400 HeaterETi 250 HeaterMasterTemp HeaterMasterTemp 125 HeaterMax-E-Therm Heater

Pentair MasterTemp Pool Heater Thermistor | 42001-0053S

Pentair SKU: 42001-0053S
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Questions about returns? View our return policy.
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Pentair Mastertemp & Max-E-Therm Thermistor 42001-0053s

Ensure your pool or spa heater operates efficiently with the Pentair Thermistor 42001-0053s, a crucial replacement part designed for precise temperature regulation. This thermistor and water sensor is compatible with several high-performance heaters, including the ETI400, Mastertemp, and Sta-Rite Max-E-Therm models.

This replacement thermistor is tailored specifically for the electrical systems of Pentair Sta-Rite Max-E-Therm and MasterTemp pool and spa heaters. Its role is critical in providing accurate temperature readings to the heater's control system, ensuring optimal heating performance and energy efficiency.

Key Features:

  • Thermistor Replacement: Direct replacement for the original part, ensuring continued accuracy and performance.
  • Compatibility: Fits perfectly with the electrical systems of both Pentair Sta-Rite Max-E-Therm and MasterTemp pool and spa heaters.
  • Accurate Temperature Sensing: Essential for maintaining the desired water temperature and efficient heater operation.

Installing the Pentair Thermistor 42001-0053s is a straightforward way to maintain the efficiency and reliability of your heating system, helping to extend the life of your pool or spa heater while ensuring consistent, comfortable water temperatures.

SKU: 42001-0053S

Questions about returns? View our return policy.

Hours Of Operation:

Monday - Friday: 7:00 am to 5:00 pm Phoenix Time

Saturday: 8:00 am to 2:00 pm

Sunday: Closed

  • We do not ship on Saturday or Sunday.
  • Orders totaling more than $300 will require signature confirmation upon delivery.
  • We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
  • Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
  • Expedited shipping options are available at checkout.

Return Policy:

  • Products that are received damaged will receive a refund in store credit.
  • Most products are eligible for return within 30 days of receipt, except where noted below.
  • To initiate a return, please complete an RMA form prior to sending your item back.
  • Original shipping costs are non-refundable and will be deducted from the return credit.
  • Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
  • Some returns will be charged an automatic 15% restocking fee.
  • We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
  • Please complete the return form to receive your RMA number and return shipping label.
  • Chemical products are not eligible for return under any circumstances.
  • The Pentair Colorsync 618031 is not eligible for return.
  • Pool cleaners are not eligible for return.
  • Opened seals and o-rings are not eligible for return.
  • Capacitors are not eligible for return.
  • Plastic popup tools are not eligible for return.
  • Automation components and circuit boards are not eligible for return.
  • If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
  • Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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