Hayward Pool Heater H5 Code | The Pool Care (2024)

The hayward pool heater h5 code indicates a temperature sensor issue. We will discuss the possible causes and solutions to resolve this problem.

A malfunctioning hayward pool heater can be frustrating, especially when it displays the h5 code. This code specifically points to an issue with the temperature sensor. The temperature sensor is responsible for monitoring and regulating the water temperature in your pool.

When it encounters a problem, it triggers the h5 code and disrupts the heater’s operation. To fix this, there are a few possible solutions. Checking the sensor’s wiring, cleaning or replacing the sensor, and ensuring proper water flow are some steps that can be taken to resolve the issue. Understanding the h5 code and troubleshooting the temperature sensor problem can help you get your pool heater back up and running efficiently.

Table of Contents

Common Causes Of The H5 Code And How To Identify Them

The hayward pool heater h5 code can be caused by various issues, including low water flow, high limit switches, or a faulty pressure switch. To identify the causes, check the water flow, inspect the switches, and consult the heater’s manual for troubleshooting steps.

If you own a hayward pool heater and have encountered the h5 code, don’t worry – we’ve got you covered! The h5 code is a common issue that indicates a problem with your pool heater. Fortunately, by understanding the possible causes of this error and knowing how to identify them, you can quickly resolve the issue and get your pool heater up and running again.

Below, we’ll explore the most common causes of the h5 code and provide guidance on how to identify them.

Low Water Flow:

  • Insufficient water flow through the pool heater can trigger the h5 code. This can occur due to various reasons, such as clogged filters or airlocks. Here’s how you can identify low water flow as the cause of the h5 error:
  • Check the pool filter and clean or replace it if necessary.
  • Ensure that the water level in the pool is adequate.
  • Verify that there are no obstructions in the water intake and discharge lines.

Faulty Temperature Sensor:

  • A faulty temperature sensor can also lead to the h5 code. The temperature sensor is responsible for monitoring the water temperature and signaling the pool heater to adjust accordingly. Here’s how you can identify if a faulty temperature sensor is causing the h5 error:
  • Check if the displayed temperature on the pool heater matches the actual water temperature.
  • Consult the user manual to locate the temperature sensor.
  • Inspect the sensor for any visible damages or loose connections.
  • If necessary, replace the temperature sensor following the manufacturer’s instructions.

Gas Supply Issues:

  • Another potential cause of the h5 code is gas supply problems. Insufficient gas supply can prevent the pool heater from generating enough heat, triggering the error. Here’s how you can identify if gas supply issues are behind the h5 error:
  • Check the gas meter and ensure it is not turned off or depleted.
  • Inspect the gas valve and verify that it is fully open.
  • Confirm that the gas line is not obstructed or damaged.
  • If you suspect a gas leak, contact a professional technician immediately for assistance.

By understanding these common causes of the h5 code and learning how to identify them, you can troubleshoot the issue efficiently. Remember to consult your hayward pool heater’s user manual for specific instructions and always prioritize your safety when dealing with gas-related concerns.

With the right approach, you’ll have your pool heater functioning flawlessly in no time.

Resolving Low Water Flow Issues

Resolve low water flow issues with your hayward pool heater h5 code. Ensure optimal water flow and an efficient heating system for your pool.

Hayward Pool Heater H5 Code: Resolving Low Water Flow Issues

Is your hayward pool heater displaying the h5 code? This error code usually appears when there is a low water flow issue. A low water flow can prevent your pool heater from operating at its optimal performance, leading to problems with heating your pool water.

In this section, we will discuss three essential steps to address and resolve low water flow issues with your hayward pool heater. Let’s dive in!

Cleaning The Pool Filter:

  • Regularly cleaning your pool filter is crucial in maintaining proper water flow and preventing h5 code errors.
  • Start by turning off the pool pump and closing the water valves.
  • Remove the filter cartridges or grids according to your pool filter type for cleaning.
  • Rinse the filter elements with a high-pressure hose to remove any debris, dirt, or contaminants.
  • If the filter cartridges or grids are excessively dirty, it may be necessary to soak them in a cleaning solution or replace them.
  • Once cleaned or replaced, reassemble the pool filter components and restart the pool pump.

Inspecting And Fixing Any Obstructions In The Water Flow Path:

  • Ensure that all valves and fittings are open and not obstructed.
  • Check for any blockages or clogs in the skimmer and pump baskets, as well as the pool’s main drain.
  • Remove any debris or dirt that may be obstructing the water flow using a skimmer net or vacuum.
  • Inspect the pool’s plumbing system for any leaks, cracks, or damaged pipes that could impede water flow.
  • If you find any obstructions or issues, clear or repair them accordingly to restore proper water flow to your hayward pool heater.

Adjusting Water Flow Rate Settings:

  • The water flow rate can impact the performance and efficiency of your pool heater.
  • Locate the flow rate control valve, typically installed on the pool’s return line or near the heater inlet.
  • Consult your hayward pool heater’s manual to determine the recommended flow rate for your specific model.
  • Adjust the flow rate control valve according to the manufacturer’s guidelines.
  • Ensuring an appropriate water flow rate will help optimize the heat transfer process and minimize the occurrence of h5 code errors.

By following these steps and resolving low water flow issues, you can ensure that your hayward pool heater operates efficiently and effectively, providing you with a comfortably warm pool all year round. Remember, regular maintenance and periodic checks are essential to prevent any recurring problems and prolong the lifespan of your pool heater.

Replacing A Faulty Temperature Sensor

If your hayward pool heater is displaying the h5 code, it may indicate a faulty temperature sensor. Replacing the sensor can help restore proper functioning and temperature regulation in your pool.

Steps To Identify And Remove The Faulty Sensor:

Identifying and removing a faulty temperature sensor in your hayward pool heater is crucial to ensuring the optimal performance of your system. Follow these simple steps to get the job done:

  • Start by turning off the power supply to the pool heater. This is essential for safety reasons and to prevent any accidental mishaps.
  • Locate the temperature sensor on your hayward pool heater. It is usually situated near the water inlet/outlet manifold or on the heat exchanger.
  • Carefully disconnect the wiring that is connected to the faulty sensor. Note the orientation and positioning of the wires so that you can reconnect them correctly later on.
  • Using a suitable wrench or pliers, gently loosen the nut that secures the temperature sensor in place. Be careful not to damage any surrounding components while doing so.
  • Once the nut is loosened, remove the faulty temperature sensor from its housing. Take note of the sensor’s shape and size as it will help you choose the appropriate replacement.

Choosing The Right Replacement Sensor:

Selecting the correct replacement temperature sensor for your hayward pool heater is crucial to ensure compatibility and optimal functioning of your system. Consider the following points when making your selection:

  • Refer to the documentation or manual provided by hayward to identify the specific model and type of temperature sensor needed for your pool heater. This information will help you make an accurate purchase.
  • Order the replacement sensor from an authorized hayward dealer or an approved supplier to ensure the quality and authenticity of the product.
  • Verify the compatibility of the replacement sensor with your hayward pool heater model. Check for any specific requirements or recommendations mentioned in the product specifications.

Installing The New Temperature Sensor:

Once you have obtained the correct replacement temperature sensor, follow these steps to install it in your hayward pool heater:

  • Begin by ensuring that the power supply to the pool heater is turned off. This is crucial to prevent any potential accidents or damage during the installation process.
  • Take the new temperature sensor and carefully insert it into the housing. Ensure that it is placed snugly and securely.
  • Use a wrench or pliers to tighten the nut that holds the temperature sensor in place. Take care not to overtighten as it may cause damage.
  • Reconnect the wiring to the new temperature sensor, making sure to match the appropriate wires as noted during the removal process.
  • Finally, turn on the power supply to your hayward pool heater and monitor the system to ensure that the new temperature sensor is functioning correctly.

By following these steps, you can easily identify, remove, choose the right replacement, and install a new temperature sensor for your hayward pool heater, ensuring optimal performance and efficiency for your pool heating system.

Addressing Gas Supply Problems

The hayward pool heater h5 code is designed to effectively address gas supply problems, ensuring optimal performance and uninterrupted pool heating. With its advanced technology and reliable functionality, it ensures a seamless and hassle-free pool heating experience.

Gas supply problems can prevent your hayward pool heater from functioning properly, causing the dreaded h5 code to appear. Fortunately, there are a few simple steps you can take to address these issues and get your heater back up and running.

Checking Gas Valve Settings

To begin troubleshooting gas supply problems, start by checking the gas valve settings on your hayward pool heater. Here are the steps to follow:

  • Ensure that the gas valve is in the “on” position.
  • Make sure that the gas valve is not set to “off” or “pilot”.
  • Verify that the gas valve is properly aligned with the gas supply pipe.

By double-checking the gas valve settings, you can rule out any simple errors and determine if there are any issues with the gas flow.

Verifying Gas Supply Pressure

If the gas valve settings are correct, the next step is to verify the gas supply pressure. Follow these steps:

  • Locate the pressure test port on the gas valve.
  • Attach a manometer to the test port to measure the gas pressure.
  • Compare the measured pressure to the manufacturer’s specified range.
  • If the pressure falls outside of the recommended range, contact a professional for further assistance.

By ensuring that the gas supply pressure is within the specified range, you can ensure that your hayward pool heater is receiving the proper amount of fuel.

Inspecting And Cleaning The Gas Burners

The final step in addressing gas supply problems is to inspect and clean the gas burners. Over time, debris and dirt can accumulate on the burners, causing them to clog and impede proper gas flow. Here’s what you need to do:

  • Turn off the gas supply to the heater.
  • Remove the burner tray or access panel to gain access to the burners.
  • Inspect each burner for any signs of dirt, debris, or corrosion.
  • Use a soft brush or compressed air to clean the burners thoroughly.
  • Ensure that each burner is clear of any obstruction before reassembling the heater.

By inspecting and cleaning the gas burners, you can eliminate any potential blockages that may be causing gas supply problems.

Remember, addressing gas supply problems is just one aspect of troubleshooting the h5 code on your hayward pool heater. If the issue persists, it is recommended to consult a professional technician for further assistance.

Regular Maintenance Practices To Avoid The H5 Code

Regular maintenance practices can help you avoid encountering the h5 code issue with your hayward pool heater. By following these practices, you can ensure your pool heater operates smoothly and efficiently without any disruptions.

Pool owners know the importance of keeping their pool in top condition. Regular maintenance is key to preventing any issues that might arise, including the dreaded h5 code on your hayward pool heater. By following a few simple maintenance practices, you can avoid encountering this error code and ensure your pool heater operates efficiently throughout the year.

Cleaning The Pool Filter Regularly:

  • Remove any debris: Check the pool filter for any leaves, twigs, or other debris that might have accumulated. These can block the water flow and lead to the h5 code.
  • Rinse the filter: Use a hose to rinse the pool filter thoroughly and remove any trapped dirt or debris.
  • Clean or replace the filter cartridge: Depending on your pool filter type, clean or replace the filter cartridge as recommended by the manufacturer.
  • Maintain water chemical levels: Properly balanced pool water helps preserve the efficiency of the pool filter and prevents clogs that can trigger the h5 code.

Checking And Cleaning The Water Flow Path:

  • Verify water level: Ensure that the pool water level is at the appropriate mark. Low water levels can cause the heater to overheat and trigger the h5 code.
  • Inspect the skimmer and pump basket: Remove any debris that has accumulated in the skimmer or pump basket. This prevents clogs and ensures proper water flow to the heater.
  • Clear the water intake: Check for any obstructions in the water intake, such as leaves or debris. Clear these to avoid disruption in water circulation.
  • Examine valves and bypass systems: Ensure all valves are fully open and functioning correctly. Also, inspect any bypass systems to ensure they are properly set up.

Inspecting And Cleaning The Heat Exchanger:

  • Turn off the power: Before inspecting or cleaning the heat exchanger, turn off the power to the pool heater.
  • Allow the heater to cool down: Give the heater sufficient time to cool down before starting any maintenance work on the heat exchanger.
  • Remove debris: Use a soft brush or compressed air to remove any debris or buildup on the heat exchanger surfaces. This helps maintain optimal heat transfer and prevents the h5 code from occurring.
  • Inspect for leaks: Check for any signs of leaks on the heat exchanger. If you notice any leaks, it’s crucial to address them promptly to prevent further damage.

By incorporating these regular maintenance practices into your pool care routine, you can minimize the chances of encountering the h5 code on your hayward pool heater. Remember, a well-maintained pool heater not only ensures optimal performance but also extends the lifespan of your equipment, saving you time and money in the long run.

Proper Winterization To Prevent H5 Code Issues

Prevent h5 code issues in your hayward pool heater with proper winterization techniques. Keep your pool heater running smoothly during winter with these tips.

As the cold winter months approach, it is crucial to properly winterize your hayward pool heater to prevent h5 code issues from occurring. These issues can result in costly repairs or even the need to replace your heater altogether. By taking the necessary steps to protect your heater from the harsh temperatures and potential frost damage, you can ensure that it remains in optimal condition and ready for use when the swimming season returns.

In this section, we will discuss two key aspects of proper winterization: draining and winterizing the pool heater, and protecting the heater from cold temperatures and frost damage.

Draining And Winterizing The Pool Heater:

Properly draining and winterizing your pool heater is an essential step in preventing h5 code issues. Follow these steps to ensure your heater is prepared for the winter season:

  • Turn off the power supply: Before starting the winterization process, make sure to turn off the power supply to the pool heater. This will help prevent any accidental damage or electrical hazards.
  • Shut off the gas supply: If your pool heater operates on gas, locate the gas supply valve and shut it off. This will prevent gas flow to the heater during the winter months.
  • Drain the water: Open the drain valves on both the inlet and outlet sides of the pool heater. Allow all the water to fully drain from the heater and the associated plumbing. This step is crucial as any remaining water can freeze and cause damage to the internal components.
  • Remove and store any removable parts: If your pool heater has any removable parts, such as filter cartridges or pressure gauges, remove them and store them in a safe place to prevent damage or loss.

Protecting The Heater From Cold Temperatures And Frost Damage:

Once the pool heater is drained and winterized, it’s important to take measures to protect it from cold temperatures and frost damage. Consider the following tips:

  • Use a pool heater cover: Investing in a quality pool heater cover can provide an extra layer of insulation and protection against frost and extreme temperatures. Ensure that the cover fits securely and covers the entire heater unit.
  • Insulate exposed pipes: Insulate any exposed pipes or plumbing connected to your pool heater. This will help prevent freezing and potential damage caused by the expansion of ice.
  • Protect the control panel: If your pool heater has a control panel exposed to the elements, consider using a protective cover or housing to shield it from moisture and the freezing temperatures.
  • Keep the area around the heater clear: Clear any debris, leaves, or objects that may accumulate around the pool heater during the winter months. This will ensure proper airflow and prevent potential damage caused by trapped moisture or pests.

By following these proper winterization techniques, you can effectively prevent h5 code issues and extend the lifespan of your hayward pool heater. Remember, it’s essential to take these measures before the onset of cold weather to mitigate any potential damage and ensure a smooth start to next year’s swimming season.

Professional Servicing And Inspections

Ensure your hayward pool heater stays in optimal condition by scheduling professional servicing and inspections. Don’t let the h5 code cause inconvenience, get expert assistance to keep your pool heater running smoothly.

Hayward Pool Heater H5 Code: Professional Servicing And Inspections

Regular maintenance checks are crucial for keeping your hayward pool heater in optimal condition and ensuring its longevity. By scheduling these routine inspections, you can identify and address any potential issues before they become major problems. When it comes to maintaining your pool heater, hiring a certified technician for professional servicing is highly recommended.

They have the expertise and experience to perform thorough inspections, diagnose problems accurately, and provide effective solutions.

Schedule Regular Maintenance Checks:

Regular maintenance checks play a pivotal role in preventing unexpected breakdowns and costly repairs. Here are some key reasons why you should schedule these checks for your hayward pool heater:

  • Ensure peak performance: Regular inspections can help identify any issues that might be affecting the performance of your pool heater. By addressing these problems promptly, you can optimize its efficiency and maintain a comfortable swimming environment.
  • Extend lifespan: Pool heaters, like any other mechanical equipment, are subject to wear and tear. Over time, components may become worn or damaged. Regular maintenance checks ensure that these issues are detected early and addressed, potentially extending the lifespan of your pool heater.
  • Minimize downtime: A malfunctioning pool heater can disrupt your swimming routine and leave you with a chilly pool. By scheduling regular inspections, you can reduce the risk of unexpected breakdowns and minimize any potential downtime.

Hiring A Certified Technician For Professional Servicing:

When it comes to the servicing and inspection of your hayward pool heater, it is crucial to trust the expertise of a certified technician. Here’s why:

  • Specialized knowledge: Certified technicians have undergone training and possess the specialized knowledge required to work on hayward pool heaters. They are familiar with the specific components, functions, and common issues associated with these heaters.
  • Accurate diagnosis: With their experience and expertise, certified technicians can accurately diagnose any problems or potential issues with your pool heater. This ensures that the appropriate repairs or maintenance tasks are undertaken, addressing the root causes effectively.
  • Warranty considerations: Hayward pool heaters often come with warranties that require professional servicing for maintaining their validity. By hiring a certified technician, you can ensure that your warranty remains intact and safeguard yourself against any unexpected expenses.

Recommended Maintenance Intervals And Tasks:

To keep your hayward pool heater in top-notch condition, the following maintenance tasks should be performed at recommended intervals:

  • Monthly basis:
  • Check and clean the pool heater’s filter.
  • Inspect and clean the burner tray, ensuring it is free from debris.
  • Verify that all electrical connections are secure and not corroded.
  • Quarterly basis:
  • Inspect and clean the heat exchanger to remove any mineral deposits or scaling.
  • Check the air intake louvers and exhaust vents for blockages or obstructions.
  • Test the pressure and temperature relief valve to ensure it is functioning correctly.
  • Annually:
  • Hire a certified technician for a comprehensive inspection and tune-up of the pool heater.
  • Clean the entire heating system, including the combustion chamber and gas orifices.
  • Test the ignition system and ensure it is functioning properly.

Remember, regular maintenance checks and professional servicing are essential for the efficient and safe operation of your hayward pool heater. By adhering to the recommended intervals and tasks, you can enjoy a comfortable and hassle-free swimming experience all year round.

Frequently Asked Questions On Hayward Pool Heater H5 Code

What Does Hs Mean On My Hayward Pool Heater?

Hs on your hayward pool heater stands for high salt. This message indicates that the salt level in your pool water is higher than the recommended range. High salt levels can lead to corrosion and damage to the pool heater and other equipment.

To resolve this issue, you should test and adjust the salt level in your pool according to the manufacturer’s recommendations. You may need to lower the salt concentration by draining and diluting the water or by using a saltwater system controller.

Maintaining the proper salt level in your pool is essential for the efficient and safe operation of your hayward pool heater. Always refer to the user manual or consult a professional if you are unsure about the corrective actions required to address the high salt warning on your hayward pool heater.

What Is The Hs Code For Pool Heater?

The hs code for pool heaters is 8419. 50. 50. Pool heaters are categorized under this specific hs code for international trade purposes.

How Do You Clean The Flame Sensor On A Hayward Pool Heater?

To clean the flame sensor on a hayward pool heater, follow these steps:1. Locate the flame sensor on the heater unit. 2. Disconnect power to the heater to ensure safety. 3. Gently remove the sensor from its housing. 4. Inspect the sensor for any visible debris or build-up.

5. Use a soft-bristle brush or compressed air to remove any dirt or dust. 6. If there is stubborn residue, lightly scrub the sensor with a fine-grit sandpaper. 7. Wipe the sensor with a clean, dry cloth to remove any remaining debris.

8. Reinsert the sensor back into its housing, ensuring a secure fit. 9. Restore power to the heater and test its functionality. 10. Regularly inspect and clean the flame sensor to ensure optimal performance and efficiency.

How Do You Turn On A Hayward H250 Pool Heater?

To turn on a hayward h250 pool heater, follow these simple steps:1. Locate the power switch or breaker panel for the heater. 2. Flip the switch or turn on the breaker to supply power to the heater. 3. Adjust the thermostat on the heater to the desired temperature.

4. Wait for the heater to start up and begin heating the pool water. It’s important to ensure that the heater is properly maintained and cleaned for optimal performance. Regularly check the heater for any issues or signs of damage, and consult the manufacturer’s instructions for any specific recommendations on operating the heater.

By following these steps, you can safely and efficiently turn on your hayward h250 pool heater and enjoy a comfortably heated pool.


Overall, dealing with the h5 code on your hayward pool heater can be frustrating, but with the right troubleshooting steps and professional assistance, you can resolve the issue and get your pool back up and running efficiently. By understanding the common causes of the h5 code, such as low gas pressure or dirty filters, you can quickly identify the problem and take appropriate action.

Regular maintenance and cleaning of your pool heater can also prevent the recurrence of the h5 code. Remember to consult the manufacturer’s manual or seek professional help if you’re unsure about any step. Keeping your pool heater in top shape not only ensures a comfortable swimming experience but also extends the lifespan of the equipment.

So take charge of the h5 code issue and enjoy your pool all year round.

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Hayward Pool Heater H5 Code | The Pool Care (1)

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Hayward Pool Heater H5 Code | The Pool Care (2024)


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