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.

Hours Of Operation:

Monday - Friday: 8:00 am to 4:00 pm Phoenix Time

Saturday and Sunday: Closed

Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
Handling time is typically only 1 day.
Any item ordered after 1pm Phoenix time, may not ship same-day.
Call us if you require expedited shipping and we can give you quotes based on your needs.

Return Policy:

All products, except as noted below, are eligible for return up to 30 days after receipt of item.
For returns, an RMA form must be filled out HERE or customers can call for additional help.
Shipping costs will be deducted from all returned items.
Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
Items broken, damaged, or inoperable due to installer error will not be refunded.
Fill out the return form or give us a call to obtain an RMA and return shipping label.
There are no returns on the Pentair Colorsync 618031
No returns on pool cleaners.
No returns on opened seals and o-rings.
No returns on capacitors.
If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
All products denied upon arrival at customers house WILL be charged the cost to ship.
Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.