Hayward H-Series Heater Thermostat w/ Knob | HAXTST1930

Hayward Products SKU: HAXTST1930
Hayward H-Series Millivolt / Electronic Heater (ED1 Style) Not sure it fits? See this part on the interactive diagram Hayward H-Series Millivolt / Electronic Heater (ED1 Style)

Hayward H-Series Heater Thermostat w/ Knob | HAXTST1930

Hayward Products SKU: HAXTST1930
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Hayward HAXTST1930 – Thermostat Kit with Control Knob

Product Overview

The Hayward HAXTST1930 is an OEM replacement thermostat kit designed for Hayward H-Series pool heaters. It restores accurate temperature adjustment and dependable heater control when the original thermostat or knob becomes worn, damaged, or unresponsive.

Key Features

  • OEM thermostat assembly designed specifically for Hayward H-Series heaters.
  • Includes thermostat unit, mounting hardware, and replacement temperature control knob.
  • Restores proper temperature regulation for safe and efficient heater operation.
  • Durable construction suited for long-term exposure inside heater cabinets.

Technical Specifications

  • Part Number: HAXTST1930
  • Application: Temperature control thermostat for H-Series pool and spa heaters
  • Components Included: Thermostat assembly, control knob, and mounting bracket

Applications & Compatibility

This thermostat kit fits select Hayward H-Series heaters, including various induced-draft and electronic/millivolt models. It is used when the temperature knob fails, the thermostat no longer responds accurately, or when corrosion or mechanical wear affects proper heater control. Always check your heater’s model plate to ensure correct fit before purchasing.

Installation Instructions

  • Shut off power and gas supply to the heater before beginning service.
  • Remove the front or side access panel to locate the existing thermostat assembly.
  • Disconnect wiring from the old thermostat and remove mounting hardware.
  • Install the new HAXTST1930 thermostat, attach the control knob, and reconnect wiring as labeled.
  • Reinstall the access panel, restore power and gas, and test heater operation by adjusting the temperature knob.

Troubleshooting

  • Heater does not respond to temperature changes: Ensure thermostat wiring is securely connected and that the knob is properly attached.
  • Temperature fluctuates or cycles: Confirm proper sensor placement and verify adequate water flow through the heater.
  • No heat output: Check safety switches, thermostat installation, and verify that gas and power are restored.

Maintenance Tip

Inspect the thermostat and control knob annually for wear, corrosion, or loose connections. Keeping these components in good condition ensures precise temperature control and extends the life of your pool heater.

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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