Jandy 110° F Thermal Regulating Valve for JXiQ™ Heaters R0589701

Jandy SKU: R0589701
Jandy JXiQ Heater Not sure it fits? See this part on the interactive diagrams Jandy JXiQ HeaterJandy JXi Heater

Jandy 110° F Thermal Regulating Valve for JXiQ™ Heaters R0589701

Jandy SKU: R0589701
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Jandy R0589701 – 110° Thermal Regulator Valve

Product Overview

The Jandy R0589701 is an OEM thermal regulator valve designed for use with Jandy JXi, JXiQ and ASME pool/spa heaters. It is factory-calibrated to regulate water temperature at 110 °F and helps maintain safe, efficient heater operation by controlling internal flow.

Key Features

  • Factory-calibrated to maintain approximately 110 °F water temperature.
  • Designed specifically for Jandy JXi, JXiQ and ASME certified heaters.
  • Corrosion-resistant construction suited for pool and spa chemical environments.
  • Mechanical operation (no electronics) provides reliable performance and long life.
  • Restores proper thermal control and reduces risk of heater overheating or short-cycling.

Technical Specifications

  • Part Number: R0589701
  • Calibration Temperature: ~110 °F (43 °C)
  • Application: Jandy JXi / JXiQ / ASME heaters
  • Construction: Durable metal alloy designed for heater water system environments

Compatibility & Fitment

This regulator replaces worn or faulty thermal control valves in Jandy JXi, JXiQ and ASME-certified gas heaters. Before ordering, verify the heater model and ensure the existing regulator is the correct part. Installing the correct part helps ensure the heater remains within safe temperature limits.

Installation Instructions

  • Turn off heater power and close water supply before servicing.
  • Drain or relieve water from the heater body to safe level.
  • Remove the old regulator valve from the heater manifold.
  • Install the new R0589701 regulator in the proper orientation, following the manufacturer torque and sealant instructions.
  • Restore water flow, power up the heater, and monitor temperature operation and heater performance.

Troubleshooting

  • Heater short-cycles or shuts off early: Check that the regulator is properly seated and calibrated, and that flow through the heater matches specification.
  • Heater outlet water too cool: Verify the regulator is functioning and not stuck open allowing bypass of the heat exchanger.
  • Leaks at regulator location: Inspect the sealing surface, ensure correct torque and that the regulator is fully compatible.

Maintenance Tip

Inspect the regulator whenever the heater is serviced. If the thermostat begins to drift or the heater experiences unusual cycling, replacing the thermal regulator can resolve issues before major component failure. Regular inspection and timely replacement help maintain safe and efficient heater operation.

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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