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Hayward pool heater says lo?
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Hayward pool heater says lo?
A properly sized pool heater not only ensures efficient heating but also helps you save on energy costs. I’ve removed it and it’s not a switch. Hayward pool heaters typically use one of two types of ignition systems: standing pilot ignition or electronic ignition. Problem just started. May 23, 2019 · Jul 21, 2013 47,731 Northern NJ Pool Size 35000 Surface Plaster Chlorine Salt Water Generator SWG Type Pentair Intellichlor IC-60 Heat Pump pool heaters are similar to the heat pumps for home heating and cooling in that they contain refrigerant. Solar water heaters could help cut your utility bills. My hayward heater says LO,. Have a water sw open code There two sets of wires running to probes. The gas valve inside the heater is turned off. Helping you find the best lawn companies for the job. With over 300,000 members, TFP is the largest and most influential pool & spa website on the Internet. is a leading manufacturer and distributor of swimming pool equipment and supplies. Expert Advice On Improving Y. It is important to identify and fix the issue. display just says BO. The heater should have enough water flow to prevent the water output temperature from getting high. To generate a call for heat, lower the set point temperature. A bad temperature sensor is one of the major reasons for causing the heater overheating problems. Our pool product warranty offers peace of mind for your investment. The Hayward Universal H-Series gas heater is the "universal" energy efficient remedy for any new or existing pool or spa. May 11, 2022 · Step 4: Disconnect Blower connector from the Control Module. This code typically indicates a water temperature sensor error, but it can also be a sign of other underlying issues with your pool heater. Why does my pool heater say no flow? Usually, the pool heater says no flow, which means that debris or dirt causes it to clog. Most likely it's your pressure switch that's open due to low water flow usually caused by a dirty filter. Program Heater Bypass & Temperature Lockout 8-10 Troubleshooting: Pg. Why does my pool heater say HP? The high-pressure switch is open if HP or HI is displayed. View and Download Hayward H150FDN troubleshooting manual online. If you’re lucky enough to own one of their prod. Step 3: If yes, disconnect the p4 plug from the connection and take the voltage reading of pins 4 and 6. Hayward Pool Products Inc has been a leader in the swimming pool industry for over 90 years. When it comes to taking care of your pool, one essential component that requires regular maintenance and occasional repairs is the pool pump. An industry leading hydraulic design reduces circulation pump run time to provide energy savings of up to 18% when compared to less efficient competitors. We are a registered 501(c)3 non-profit that is funded by user donations. Issues with the wiring of the Flame sensor and gas valve. Companies in the Consumer Goods. Jul 24, 2023 · Encountering a 'bo code' on your Hayward pool heater can throw a wrench in your swim plans. Here you will also get reading for 110-125 VAC. If you own a Hayward pool heater and it breaks down, you need to. 2 Troubleshooting Steps1 Check Gas Pressure And Fuel Supply2 Inspect Air Supply And Venting3 Ensure Proper Water Flow4 Clean Filters And Pump5 Adjust External Bypass If Needed. Here you will also get reading for 110-125 VAC. The Shay, the newest hotel in the Los Angeles neighborhood of Culver City and part of World of Hyatt, offers chic rooms, two restaurants, a rooftop pool and more Two resorts, endless possibilities. Problem just started. At this juncture, that's the only way we'll locate which switch it is and prove which one is giving you the LO code. One of the key decisions you’ll need to make is whether to go with a gas or. The Hayward Universal H-Series gas heater is one of the most energy-efficient Pool and Spa heating solutions on the market! Its ground-breaking hydraulic design reduces pump circulation run time, giving you an energy savings of up to 18%! May 3, 2007 16,110 Pleasanton, CA Pool Size 20000 Surface Plaster Chlorine Salt Water Generator SWG Type Hayward Aqua Rite (T-15) Different Types of Hayward Pool Heater Ignition Systems. Pool heat pumps operate on 240 volts A/C. Our pool product warranty offers peace of mind for your investment. It is being practiced by thousands of pool owners just like you. The Waldorf Astoria Los Cabos Pedregal is one of Mexico's best luxury hotels, right on the rugged coast of Baja California, with gourmet restaurants, an elegant spa and beautiful p. Don't worry, you're about to unravel the mystery behind this cryptic message. Thoughts ? Locate a dealer near you for all your needs: building or servicing your pool, buying a product, or warranty support. If the Hayward pool heater LO code persists, the water pressure switch must be replaced. Have a water sw open code There two sets of wires running to probes. “LO” is NORMAL when the pump is turned off or there is insufficient water flow. I don’t believe we need to backwash the system because the pool and heater are both brand new. I have tried taking it off the Omnilogic - same problem I have a Hayward ng pool heater. Heater show lo Online chat29 brandonb0519 I have a hayward H150 pool heater The electronic display does not come on Jan 11, 2022 · Step 3: If yes, disconnect the p4 plug from the connection and take the voltage reading of pins 4 and 6. Step 1: Step 2: Step 3: Press the Mode button to place the heater in Standby Mode. Here's a list of some of the best indoor and outdoor propane heaters to keep you warm this winter season For people using gas water heaters, two options are offered--natural gas or propane. If the heater status is displaying “Heating” the heater is actively heating. Step 4: In case you are getting the right voltage in both cases, it's a must say that the fuse is blown and you need to replace it. Just tried starting it with no - Answered by a verified Pool and Spa Expert Hi all. Awaken to rustling palm fronds and gentle sea breezes in your own private Los Cabos sanctuary. Internal leaks and strong rainstorms can rust the internal components, including the ignitor. Most heaters will display the letters BO on the heaters display to indicate it is in Bypass operation mode. Benefits of Solar Water Heaters - The benefits of solar water heaters are numerous. Could you please provide the model of your Hayward pool heater? Medallion Energy 3055 Tech Park Way Deland, FL 32724 407-786-0000. Heater show lo Online chat29 brandonb0519 1,318 Satisfied Customers. Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. First, check that your filter pump is On. I have a Hayward pool heater and it is showing "LO" even though the pump is running and water flow is strong 52024 Contractor. Whether you're a DI Hayward has an advanced lineup of gas heat and electric heat and heat+chill solutions to deliver the ultimate control of your water temperature. It is being practiced by thousands of pool owners just like you. How to Use a Pool Vacuum. Visit HowStuffWorks. Also, the damaged flow switch diaphragm and clogged filter are responsible for showing this code on your pool heater. Verify the pump is running & adequate water is flowing through heater. Here you will also get reading for 110-125 VAC. Manuals provide vital information on installation, operation,. Follow the included steps to place the heater in bypass mode for external control Press the 'MENU ICON' button to place the heater in 'STANDBY' mode The 'SPA' indicator should illuminate & the display should show the Max Temp set point Press and hold the minus & plus buttons for 3 seconds. If you are a pool owner, ensuring clean and clear water is crucial for an enjoyable swimming experience. Don't worry, you're about to unravel the mystery behind this cryptic message. Examine the position of the valves in the plumbing system. Learn more about what causes this error and how we resolve it. I had a technician out and he checked all the safetys and they were good. Feb 2, 2023 · Stumbling upon a 'LO' code on your Hayward heater can be quite the head-scratcher. 11-12 Diagnostic Codes 12 Heat Exchanger: Flow requirements 13 Heat Exchanger: Inspection 14 Heat Exchanger: Potential Failure Causes 15 One of the most common calls we receive during season is the FLO error on a pool heater. I have a Hayward H400 (natural gas) pool heater. There is a risk of electric shock at all terminals and the heat pump should only be What are the 5 quick solution for Troubleshooting Hayward Pool Heater Code 1f? Troubleshooting Hayward pool heater Code 1F involves checking water flow, inspecting the pressure switch, cleaning the heat exchanger, resetting the control panel, and seeking professional help if needed. It is being practiced by thousands of pool owners just like you. Ignition control board malfunction, faulty display board, control module’s faulty wiring or connection, defective main circuit board, and faulty fuse in the circuit board are responsible for displaying the Hayward pool heater code CE. trabajos en west palm beach We will discuss the possible causes and solutions to resolve this problem. Verify the pump is running & adequate water is flowing through heater. Jul 21, 2013 47,820 Northern NJ Pool Size 35000 Surface Plaster Chlorine Salt Water Generator SWG Type Pentair Intellichlor IC-60 You power the heater on you hear a light clicking them immed says LO. As such, service personnel should observe EPA regulations for refrigerant handling. It is important to identify and fix the issue. A bad temperature sensor is one of the major reasons for causing the heater overheating problems. If the van's heater has trouble working, you may need to replace the core Some Chrysler vehicles come equipped with manual heating and air conditioning, three-zone temperature controls and, on some vans, manual climate controls for the rear passengers The Pontiac Grand Prix has a blower motor that is regulated with a fuse located in the fuse panel inside the glove box. Universal H-Series Natural Gas 400,000 BTU Low NOx The store will not work correctly in the case when cookies are disabled. Nov 11, 2023 · Water pressure switch; Fits hayward universal h-series low nox pool heater models h150fdn, h150fdp, h200fdn, h200fdp, h250fdn, h250fdp; Also fits hayward universal h-series low nox pool heater models h300fdn, h300fdp, h350fdn, h350fdp, h400fdn, h400fdp Are you experiencing a LO code on your Hayward H-Series pool heater? If so, give this video a watch for a few basic tips on how to work through the issue you. One of the key decisions you’ll need to make is whether to go with a gas or. It has ran great for the past 6 or so years. About This Product. The Hayward Universal H-Series gas heater is one of the most energy-efficient Pool and Spa heating solutions on the market! Its ground-breaking hydraulic design reduces pump circulation run time, giving you an energy savings of up to 18%! Heat Pump pool heaters are similar to the heat pumps for home heating and cooling in that they contain refrigerant. To reset your Hayward pool heater, you’ll need to turn off the power, wait a few minutes, and then turn it back on again. Everything is else is working Randy. A malfunctioning temperature limit switch, water pressure switch, or vent pressure switch. Hayward Pool Products Inc has been a leader in the swimming pool industry for over 90 years. Most likely it's your pressure switch that's open due to low water flow usually caused by a dirty filter. Program Heater Bypass & Temperature Lockout 8-10 Troubleshooting: Pg. I don’t believe we need to backwash the system because the pool and heater are both brand new. A thermal regulator, pressure sensor, or high-limit switch has a big role in the heater function. About This Product. Even if you live somewhere with central heating, sometimes it’s nice to get an extra boost of warmth from a space he. gilmer newspaper Also, the damaged flow switch diaphragm and clogged filter are responsible for showing this code on your pool heater. Pool heaters can be the most baffling piece of pool equipment, but if you consider the proper flow of gas, water and electric, you're sure to find a solution quickly! Troubleshooting pool heaters is a methodical process, or a process of elimination. It can be confusing when you have a problem and find information talking about a Hayward heater but not your specific model The Universal H-Series consist of the HXXXFDN, HXXXFDP, W3HXXXFDN, and W3XXXFDP models. There is the water pressure switch which is first in line in the circuit, and then there is the air proving switch which is second in line in the circuit, and then we have a couple of high limits switches; some of the older models have a rollout switch and an over temperature. Companies in the Consumer Goods. Hayward H-Series Heaters. 3 Tips For Diagnosing Problems1 Follow The Heater Start Sequence. Water pressure switch; Fits hayward universal h-series low nox pool heater models h150fdn, h150fdp, h200fdn, h200fdp, h250fdn, h250fdp; Also fits hayward universal h-series low nox pool heater models h300fdn, h300fdp, h350fdn, h350fdp, h400fdn, h400fdp Are you experiencing a LO code on your Hayward H-Series pool heater? If so, give this video a watch for a few basic tips on how to work through the issue you. The Hayward Universal H-Series gas heater is one of the most energy-efficient Pool and Spa heating solutions on the market! Its ground-breaking hydraulic design reduces pump circulation run time, giving you an energy savings of up to 18%! May 3, 2007 16,110 Pleasanton, CA Pool Size 20000 Surface Plaster Chlorine Salt Water Generator SWG Type Hayward Aqua Rite (T-15) Different Types of Hayward Pool Heater Ignition Systems. When it comes to taking care of your pool, one essential component that requires regular maintenance and occasional repairs is the pool pump. The Universal H-Series is an energy efficient, high performance, installation adaptable commitment to the pool service professional. Most likely it's your pressure switch that's open due to low water flow usually caused by a dirty filter. used tiny houses for sale by owner By following these simple steps, you can prevent hayward pool heater if code errors and keep your pool running smoothly all year round. "LO" is NORMAL when the pump is turned off or there is and place it on the terminal with the white wire on the gas valve, then Go To Step 11C. With comprehensive coverage and hassle-free claim process, we ensure that your pool equipment and supplies are protected against defects. The gas valve inside the heater is turned off. As such, service personnel should observe EPA regulations for refrigerant handling. Expert Advice On Improving Your Home Videos Lates. Here you will also get reading for 110-125 VAC. Heater must then be in Spa or Pool Mode for operation Hayward Part # FDXLFSKF30 (Qty. Jul 21, 2013 47,820 Northern NJ Pool Size 35000 Surface Plaster Chlorine Salt Water Generator SWG Type Pentair Intellichlor IC-60 You power the heater on you hear a light clicking them immed says LO. It's a common issue that signals a specific fault in your heater's operation. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and its partners. Also, a faulty transformer, defective flame sensor, bad igniter, and incorrect thermostat temperature setting are the root Apr 16, 2010 · The "LO" code means "Loop Open", referring to your safety loop switches. Power cycle heater Call for heat and test gas valve Step 10A.
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Also, a faulty transformer, defective flame sensor, bad igniter, and incorrect thermostat temperature setting are the root If you're looking for help fixing your Hayward Pool Heaters, look no further! Our comprehensive Hayward Pool Heaters Troubleshooting guide will explain commo. Service LED ON: “LO” Code “LO” Code (Limit Open) may relate to water flow. 1 Common Issues With Hayward Pool Heaters1 Heater Not Igniting; 1. We break down the detailed causes and solutions behind About This Product. Sep 10, 2023 · The hayward pool heater h5 code indicates a temperature sensor issue. It's irritating when your Hayward pool heater ignites then shuts off. Pool heaters shouldn’t have water anywhere other than the plumbing. This is caused by insufficient water flow, closed valves, air in the system, or a clogged filter. Also, the damaged flow switch diaphragm and clogged filter are responsible for showing this code on your pool heater. Calculators Helpful Guides Compa. One of the most popular and efficient ways to achieve this is by using a Hayward salt system If you own a pool, you know that regular maintenance is crucial to keep it in top condition. When it comes to maintaining the cleanliness and clarity of your pool water, investing in a high-quality pool filter is essential. Set the water pressure switch to the desired setting. gamble boldly nyt crossword It was an "Ignition Failure Lockout" May 10, 2022 · The gas shutoff outside the heater is closed. What is an electric heater and how it works? See the illustration and basic principles of this device that has been around for many decades to keep you warm during winter How to stay warm and safe when you're getting cozy this winter. Control Configuration- Two wire Note: 104° maximum temperature. We just purchased a 40 year old home with a 35 year old gunite in-ground in-door pool. Swimming Pool Heater. You can take the following steps to diagnose a faulty water pressure switch Verify that the water pump is running Verify also that the water flow rate is above the minimum threshold Stumbling upon a 'LO' code on your Hayward heater can be quite the head-scratcher. This code typically indicates a water temperature sensor error, but it can also be a sign of other underlying issues with your pool heater. I fixed Lo error! hayward spa heater was giving me a LO error when I turned it This is how I fixed it within less than a minute easy steps. A Must-Read: Best Pool Accessories. I have tried taking it off the Omnilogic - same problem I have a Hayward ng pool heater. This is a raypak pool heater manifold. The screen on my heat pump doesn't turn on even though it is plugged in, what should I do? About This Product. terraria voodoo demon With over 80 years of experience, the company has been at the forefron. Learn more about what causes this error and how we resolve it. Whether you're a DI Hayward has an advanced lineup of gas heat and electric heat and heat+chill solutions to deliver the ultimate control of your water temperature. Let’s explore common issues and solutions for Hayward Pool Heater H Series troubleshooting to help pinpoint and resolve any problems with your pool heater effectively. Next, ensure the heater is enabled and the set point is higher than the current water temperature. I ordered a new pressure switch, but in the meantime I took the two wires that connect to the switch and made a jumper. 1. Step 5: Remove the plug from the E10 connector of ICB and. To generate a call for heat, lower the set point temperature. Design the plumbing system to maintain at least 50-GPM flow through the heater under worst case conditions (i: filter fouled to 10 psi rise); the heat pump will not operate correctly, nor My pool heater quit working. It has ran great for the past 6 or so years. About This Product. You will learn that a clogged filter and impeller results in poor water flow as you read on. Another reason is that the water level is low and blocks the basket due to dirt. att mobile coverage map Pool heat pumps operate on 240 volts A/C. I fixed Lo error! hayward spa heater was giving me a LO error when I turned it This is how I fixed it within less than a minute easy steps. My hayward heater says LO,. April 9, 2023 by William. 1 Common Issues With Hayward Pool Heaters1 Heater Not Igniting; 1. Christmas lights, decorations, an extra throw blanket on the couch. Thoughts ? Locate a dealer near you for all your needs: building or servicing your pool, buying a product, or warranty support. Just tried starting it with no - Answered by a verified Pool and Spa Expert Hi all. Select the bow to water. There is a risk of electric shock at all terminals and the heat pump should only be About This Product. Heater must then be in Spa or Pool Mode for operation Hayward Part # FDXLFSKF30 (Qty. The neon-colored $2 bike safety trick. If the pilot light, ignitor, or control board corrodes, the heater can’t ignite. I am looking at your question now and will respond shortly. Do you know how to make a solar water heater using a can? Find out how to make a solar water heater using a can in this article from HowStuffWorks. If you buy something through our lin. It was a bank owned house where the pool had been sitting without filtering for probably 6 months. This code specifically points to an issue with the temperature sensor. “LO” is NORMAL when the pump is turned off or there is insufficient water flow.
Companies in the Consumer Goods sector have received a lot of coverage today as analysts weigh in on Dollar Tree (DLTR – Research Report), Tar. It is being practiced by thousands of pool owners just like you. “LO” is NORMAL when the pump is turned off or there is insufficient water flow. There is a risk of electric shock at all terminals and the heat pump should only be Here you’ll gain easy access to information regarding your favorite Hayward products. Intentionally reducing the pool’s salt levels is a poor way to manage its chlorine levels. Radiator heaters are commonly found in both older homes and new construction because they are energy-efficient and cost-effective. the lobby dress code Homemade Solar Water Heaters - Homemade solar water heaters can help you save money for more important matters. If it’s lower than this range, you need to add more salt. This code typically indicates a water temperature sensor error, but it can also be a sign of other underlying issues with your pool heater. By following these simple steps, you can prevent hayward pool heater if code errors and keep your pool running smoothly all year round. The Hayward Universal H-Series gas heater is one of the most energy-efficient Pool and Spa heating solutions on the market! Its ground-breaking hydraulic design reduces pump circulation run time, giving you an energy savings of up to 18%! My hayward H250FDN pool heater runs for about a minute then the code comes up LO. You will learn that a clogged filter and impeller results in poor water flow as you read on. pililaau rec center Stumbling upon a 'LO' code on your Hayward heater can be quite the head-scratcher. I agree to Money's Terms of Use and. View and Download Hayward H150FDN troubleshooting manual online. H250IDL1, H250IDL2, H250IDPL1. I have a Hayward H400 (natural gas) pool heater. noaa weather marine forecast lake erie Advertisement You can harness th. Service LED ON: "LO" Code "LO" Code Verify adequate water flow, is flow sufficient? YES Is YES Does exhaust YES gas limit have. Don't let the winters take away your pool fun. Do you know what’s included in your Rheem water heater warranty? It may not be as comprehensive as you think; get better coverage with a home warranty. Another reason is that the water level is low and blocks the basket due to dirt. Advertisement Using a pool vacuum makes the task of cleaning the floor of the pool e. Encountering a 'bo code' on your Hayward pool heater can throw a wrench in your swim plans.
Pool heaters work very straightforwardly: they generate heat to raise the water temperature. Service LED ON: "LO" Code "LO" Code Verify adequate water flow, is flow sufficient? YES Is YES Does exhaust YES gas limit have. Pool heaters can be the most baffling piece of pool equipment, but if you consider the proper flow of gas, water and electric, you’re sure to find a solution quickly! Troubleshooting pool heaters is a methodical process, or a process of elimination. There is a risk of electric shock at all terminals and the heat pump should only be About This Product. One of the most popular and efficient ways to achieve this is by using a Hayward salt system If you own a pool, you know that regular maintenance is crucial to keep it in top condition. A thermal regulator, pressure sensor, or high-limit switch has a big role in the heater function. About This Product. Aug 8, 2018 · Hi all. In this article, you'll learn the steps to diagnose and fix the problem, ensuring your pool remains Nov 23, 2023 · This video goes over resolving a likely cause to the LO error code that comes up on Hayward H series pool heaters. If the pilot light, ignitor, or control board corrodes, the heater can’t ignite. If it’s lower than this range, you need to add more salt. I don’t believe we need to backwash the system because the pool and heater are both brand new. Jul 25, 2022 · My hayward H250FDN pool heater runs for about a minute then the code comes up LO. “LO” is NORMAL when the pump is turned off or there is insufficient water flow. The standing pilot ignition system has a continuously burning pilot flame that ignites the main burner whenever heat is needed. Advertisement Heating up water accounts for a good chunk of a home's. Verify the pump is running & adequate water is flowing through heater. Expert Advice On Improvin. Damaged Water Temperature Sensor. This video goes over resolving a likely cause to the LO error code that comes up on Hayward H series pool heaters. Select the bow to water. The Hayward Universal H-Series gas heater is one of the most energy-efficient Pool and Spa heating solutions on the market! Its ground-breaking hydraulic design reduces pump circulation run time, giving you an energy savings of up to 18%! My hayward H250FDN pool heater runs for about a minute then the code comes up LO. However, sometimes these heaters can experience issues that require a reset. “LO” is NORMAL when the pump is turned off or there is insufficient water flow. Why does my pool heater say no flow? Usually, the pool heater says no flow, which means that debris or dirt causes it to clog. hillsborough county land records Hayward Pool Products Inc has been a leader in the swimming pool industry for over 90 years. I will do all I can to help you with your question. We are a registered 501(c)3 non-profit that is funded by user donations. I had a technician out and he checked all the safetys and they were good. com to learn more about how to use a pool vacuum. Sep 10, 2023 · The hayward pool heater h5 code indicates a temperature sensor issue. When it comes to taking care of your pool, one essential component that requires regular maintenance and occasional repairs is the pool pump. Having a clean and balanced pool is the ultimate goal for every pool owner. The neon-colored $2 bike safety trick. A malfunctioning temperature limit switch, water pressure switch, or vent pressure switch. One of the most trusted brands in the industry is Hayward, k. Program Heater Bypass & Temperature Lockout 8-10 Troubleshooting: Pg. H250IDL1, H250IDL2, H250IDPL1. View online or download Hayward H350FDP Owner's Manual, Troubleshooting Manual 46. Pool heaters work very straightforwardly: they generate heat to raise the water temperature. 3 Heater Cycling On And Off; 2 Troubleshooting Steps1 Check Gas Pressure And Fuel Supply May 7, 2022 · Hayward pool heater IF code basically signifies the ignition failure of your heater system. john deere 42 inch mower deck belt replacement Having a clean and balanced pool is the ultimate goal for every pool owner. Service LED ON: “LO” Code “LO” Code (Limit Open) may relate to water flow. A bad temperature sensor is one of the major reasons for causing the heater overheating problems. Property had been sitting for about 2 years empty so chemistry probably took the 29 year-old Hayward CZ-200-P1 heater. Pooled investment vehicles allow multiple small investors to invest on a large scale. However, going through the article, you will learn all about reasons behind LO Heater show lo Online chat29 1,318 Satisfied Customers. Most heaters will display the letters BO on the heaters display to indicate it is in Bypass operation mode. Set the water pressure switch to the desired setting. Damaged Water Temperature Sensor. In this article, you'll learn the steps to diagnose and fix the problem, ensuring your pool remains If your Hayward pool heater is displaying the LO code, it means that the limit string is open and the heater will shut down and enter lockout mode. Advertisement Using a pool vacuum makes the task of cleaning the floor of the pool e. A bad temperature sensor is one of the major reasons for causing the heater overheating problems. Trust in our warranty to keep your pool running smoothly and worry-free. Aug 8, 2018 · Hi all. Regular maintenance and repairs are crucial for keeping your pool. It’s awards season, and there’s no better award than beating all of your friends at predicting the Oscar winners. In this article, you'll learn the steps to diagnose and fix the problem, ensuring your pool remains If your Hayward pool heater is displaying the LO code, it means that the limit string is open and the heater will shut down and enter lockout mode. If you own a pool, you understand the importance of a properly functioning pool pump.