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Home Pool Pool Controls & Automation Systems Hayward Aqua Solar Controls Hayward Aqua Solar Pool Control 12-24VAC and 120-240VAC Output | GL-235
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Hayward Aqua Solar Pool Control 12-24VAC and 120-240VAC Output | GL-235

Hayward Aqua Solar Pool Control 12-24VAC and 120-240VAC Output | GL-235 Hayward Aqua Solar Pool Control 12-24VAC and 120-240VAC Output | GL-235 Hayward Aqua Solar Pool Control 12-24VAC and 120-240VAC Output | GL-235

Platinum Preferred Manufacturer
  • Solar Control for pool or spa heating and cooling
  • Microprocessor-based technology
  • Solar heating to nocturnal cooling selectable operation
  • LED status indicator
  • Automatically maximizes solar heat collection
Aqua Solar GL-235 
   America’s best-selling solar control is designed for easy and dependable operation. Its microprocessor-based technology ensures reliable and accurate performance. Advanced features include differential temperature control, selectable high limit, programmable recirculation freeze protection, nocturnal cooling, and optional booster pump control.

   Hayward® solar controllers
work to heat or cool your pool and spa using nature’s freely available energy. You can enjoy significant savings and a better pool and spa experience, while being environmentally responsible.
   Conserving energy, reducing pollution and "going green" are in everyone's best interest. With Goldline Controls' Solar Combos, you'll be doing your part because solar controls are as environmentally responsible as they are high-performance and user-friendly. 
   The Solar Combos are bundled systems consisting of a controller, an actuator, a diverter valve and two temperature sensors. They maximize solar heat collection by monitoring the temperature of both your solar collectors and your pool. When your pool needs heating – and your solar collectors are in energy-receiving mode – the controller automatically
diverts the water flowing between your pool's filter and gas heater and routes it through your solar collectors. There, the water is heated to a pre-set temperature, or until no more solar energy is available, at which time the gas or electric heater kicks in, using only as much fuel as necessary to make up the difference.

Introducing Aqua Sloar Controls
   Hayward offers a complete selection of solar controllers that help you maintain the perfect water temperature, without using your heater. All Aqua Solar controllers automatically divert the water flowing between your pool’s fi lter and heater and route it through solar thermal collectors. There, the water is heated to a set temperature and circulated back into the pool or spa. Pool owners can even maintain their pool and spa at different temperatures.
   Aqua Solar can also cool a pool and spa. If water is higher than the set temperature, and the temperature in the solar collectors is at least 8° cooler than the pool water, Aqua Solar automatically circulates cooler water into the pool or spa. An Aqua Solar System can pay for itself in as little as three years.

  • America’s best-selling entry-level solar control
  • Microprocessor-based technology
  • Reliable, accurate performance
  • LED status indicator
  • Automatically maximizes solar heat collection
  • Solar heating to nocturnal cooling selectable operation


  • Quick, accurate, easy-to-set desired temperature controls
  • Ensures protection from the elements; guards against tampering
  • Easy to read, understand and operate
  • One-control for just right automation
  • Selectable option activates solar when ambient temperature nears 32°F
  • Assurance of safety and performance
All Aqua Solar controls offer:
  • Automation that maximizes solar heat collection
  • Single-setting, precision temperature adjustment
  • Automatic switching (selectable) from solar pool heating to cooling
  • Easy-to-read LED indicators showing system status
  • Freeze protection option if temperature nears 32°F
  • Microprocessor-based electronics for accuracy and reliability
  • Locking, weatherproof enclosure
  • Installer-programmable features for system adaptability
  • NSF, UL and CUL approved
  • Exclusive 5-year limited warranty

Pool Type
Installation Type
Q & A
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 8 questions Browse 8 questions and 3 answers
Does it icludes the 3-way valve and the water temperature sensor ??
Gen M on Oct 7, 2018
Only works when I put it on on manual and the only light on is power.ehat is the problem?
A shopper on Mar 29, 2018
Can I replace a bad gl- 35 with this?
Brian F on Jun 29, 2016
My lights no longer come on in my control box. How do I know if it's working? And what can I do to fix this problem
Jade M on Nov 14, 2021
BEST ANSWER: Maybe fuze needs to be replaced? Is there a power to the box?
How do I use the cooling aspect? I know I have to run everything at night and turn it down to 75 degrees. Do I put it on manual or auto?
Marlene S on Jul 27, 2021
Yes - just run the thermal Pool Solar System at night to cool the pool - just change the time from day to night.
Does it come with water and solar sensors?
A shopper on Mar 13, 2021
BEST ANSWER: It doesn't come with sensors Easy to fit and works well
Can I buy just the box that houses the controller?
Walter W on Oct 10, 2021
Looking for a replacement for Solarmetrics SP10. Will the Hayward device work as a replacement?
A shopper on Dec 20, 2020
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Hayward Pool Products warranties all items sold over the internet for a period of one year, parts only, no labor, ONLY when purchased from a Hayward Authorized Online Reseller.
  • Salt cell replacements W3T-CELL15, W3T-CELL-9, and W3T-CELL-3 include a three year, parts only warranty, when purchased from a Hayward Authorized Online Reseller.
Pool Supply Unlimited is a Hayward Authorized Online Reseller.
For Hayward warranty registration information, and to submit online, please visit www.hayward-pool.com
This information was updated on 4/15/2020. For the most current information and full warranty policy please visit www.hayward-pool.com

 Adobe Acrobat PDF Warranty Information
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Pool Supply Unlimited is an e-commerce company that loves water. We love to pump it, filter it, heat it, chlorinate it, light it up and stare at it while we're barbequing a fat, juicy steak. There are real pool professionals working here. Our guys have seen thousands of pools in their careers, no exaggeration. We are based in Southern California and can land most products to your door (within the 48 contiguous states) in less than a week.
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