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Hayward H-Series FD Heater Thermistor | FDXLTER1930

Hayward Products SKU: FDXLTER1930
Hayward H - Series FD Heater Thermistor | FDXLTER1930 - Heater Parts - img - 1
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Hayward H-Series FD Heater Thermistor | FDXLTER1930

Hayward Products SKU: FDXLTER1930
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Hayward FDXLTER1930 Thermistor

The Hayward FDXLTER1930 thermistor is a genuine replacement sensor designed for use in Universal H-Series low-NOx pool heaters. It monitors water or system temperature to ensure accurate control and safe heater operation.

Key Features

  • Replacement thermistor for Universal H-Series heaters by Hayward.
  • Ensures accurate temperature sensing for reliable heater operation.
  • Supplied as an OEM part—fits multiple H-Series models.
  • Designed for in-ground pool heater systems and commercial or residential applications.

Technical Details

  • Part Number: FDXLTER1930
  • UPC: 610377073790
  • Compatible With: Hayward Universal H-Series Low NOx models (e.g., H150FDN, H150FDP, H200FDN, H200FDP, H250FDN, H250FDP, H300FDN, H300FDP, H350FDN, H350FDP, H400FDN, H400FDP)
  • Application: Pool and spa heater temperature sensor

Installation & Compatibility Notes

Confirm that your heater model matches one of the supported H-Series models. Replace the thermistor only when the heater is powered off and access to the sensor location is available. Proper wiring and connection according to the heater’s wiring diagram are essential to restore correct temperature sensing and safe operation.

Maintenance Tips

  • Inspect the sensor wiring and connection for any signs of corrosion or damage.
  • Ensure the sensor probe is correctly positioned and secured in the specified sensor port.
  • If the heater shows temperature errors or fails to up-rate temperature correctly, the thermistor may be the root cause.
  • Always restore correct system grounding and return covers after service.

Why Choose This Part?

Installing the correct sensor for your heater ensures the control board receives accurate temperature feedback, which supports efficient heating, safe operation, and protects the heat exchanger from over-temperature damage. The Hayward FDXLTER1930 offers a factory-matched replacement, maintaining system integrity and avoiding compatibility issues.

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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