Lo hayward heater - The Hayward Universal H-Series gas heater is the “universal” energy efficient remedy for any new or existing pool or spa. An industry leading hydraulic design reduces circulation pump run time to provide energy savings of up to 18% when compared to less efficient competitors. The energy efficiency of the Universal H-Series gas heater ...

 
Heater must then be in Spa or Pool Mode for operation. The heater will fire when instructed by the external control. Control Configuration- Two wire Note: 104° maximum temperature. Step 1: Step 2: Step 3: Press the Mode button to place the heater in Standby Mode. Hold the Down Arrow and Mode buttons simultaneously for 3 seconds. Honda p2185

The Hayward Heater HS code indicates that either your water temperature has exceeded a maximum of 104°F or the water temperature is changing at an unusual rate (faster than 6°F in 60 seconds or less while the heater) is on and firing.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. To fix the problem and close the …HeatPro In Ground Heat Pump, 140,000 BTUs, Square Platform. Hayward has an advanced lineup of gas heat and electric heat and heat+chill solutions to deliver the ultimate control of your water temperature.HeatPro In Ground Heat Pump, 140,000 BTUs, Square Platform. Hayward has an advanced lineup of gas heat and electric heat and heat+chill solutions to deliver the ultimate control of your water temperature.* Texas Heater Kits Available * 500,000 BTU provides unprecedented speed to heat, with just 2 models delivering 1 million BTU’S while using minimal pump room space SpecificationsLocate a dealer near you for all your needs: building or servicing your pool, buying a product, or warranty support.First, turn off the power to the pool heater circuit breaker. This should immediately shut down the pool heater. If the circuit breaker does not shut off, you should call a professional service technician to come out and inspect the problem. Next, check the fuse box located near the pool pump. The fuses should be in good condition.18 Oct 2020 ... was getting CE code, aka Communication Error. Replaced main board, display board, and display panel.This video goes over resolving a likely cause to the LO error code that comes up on Hayward H series pool heaters. Here's a link on the part you will likely...Hayward Pool Products Inc. is a leading manufacturer and distributor of swimming pool equipment and supplies. With over 80 years of experience, the company has been at the forefron...LO Code Pages 40-43 IF Code Pages 44-46 AC Code Page 47 AO Code ... Heater must then be in Spa or Pool Mode for operation. The heater will ... Hayward Part # …The Hayward Heater HS code indicates that either your water temperature has exceeded a maximum of 104°F or the water temperature is changing at an unusual rate (faster than 6°F in 60 seconds or less while the heater) is on and firing.The Lo on a Hayward heater means “low.” When the Lo setting is selected, the heater runs at a lower speed, which can help conserve energy. In some cases, the Lo setting may indicate a malfunction or another issue with the heater. If you notice your Hayward heater displaying an LO code, it is important to check the manual or contact …POOL AND SPA/HOT TUB HEATERS H150FD, H200FD, H250FD, H300FD, H350FD, H400FD & H500FD MODELS SERVICE & INSTALLATION MANUAL ... Tel: 08-355-75 www.hayward-pool.com USE ONLy HAyWARD GENUINE REPLACEMENT PARTS SAFETy INFORMATION 3 Basic safety precautions should always be followed, including … Universal H-Series ASME Gas Heater. Hayward. SKU: H500FDPASME. Universal H-Series ASME gas heaters are designed and certified for commercial use with exceptional corrosion resistance and best in class speed-to-heat capability. Add to Compare. Add to Export. Overview. Specifications. Hayward Pool Products Inc. is a leading manufacturer and distributor of swimming pool equipment and supplies. With over 80 years of experience, the company has been at the forefron...Compatible Replacement for: Hayward H-Series ed2 Pool Heaters, Hayward H-Series LoNox models h150fdn, h150fdp, h200fdn, h200fdp, h250fdn, h250fdp, h300fdn, h300fdp, h350fdn, h350fdp, h400fdn, h400fdp ; Manufactured by Optimum Pool Technologies ; NOTE: This is a compatible aftermarket replacement part. The manufacturers' names …1. Hayward Pool Heater Service Light LO; 2. Hayward Pool Heater Service Light CE; 3. Hayward Pool Heater Service Light IF; 4. Hayward Pool Heater Service Light AO; 5. Hayward Pool Heater Service Light BD; FAQ: What are the Hayward pool heater lockout settings? How to reset Hayward pool heater?Hayward Heater LO code. Thread starter joeg679; Start date Jul 19, 2023; Jump to latest Follow Reply Forums. Equipment - Build, Use, and Repair. Pumps, Filters, and Plumbing . 1; 2; Next. 1 of 2 Go to page. Go. Next Last. J. joeg679 Member. May 28, 2017 21 NJ. Jul 19, 2023; Add bookmark #1 Hello, I was getting a Lo code on my heater …Hayward Heater Model H400FDNDisassemble and Re-AssembleHayward H-Series H400FD Heat Exchanger AssemblyRepair Heat Exchanger (Model FDXLHXA1400)400,000 BTU he...Oct 24, 2019 · One of the most common calls we receive during season is the FLO error on a pool heater. Learn more about what causes this error and how we resolve it. 18 Oct 2020 ... was getting CE code, aka Communication Error. Replaced main board, display board, and display panel.If you own a pool, you understand the importance of a properly functioning pool pump. A Hayward pool pump is a popular choice for many pool owners due to its efficiency and reliabi...View online or download Hayward H400FDN Owner's Manual, Troubleshooting Manual. ... Hayward Manuals; Heater; H400FDN; Hayward H400FDN Manuals. Manuals and User Guides for Hayward H400FDN. We have 4 Hayward H400FDN manuals available for free PDF download: Troubleshooting Manual, ... LO" Code. 46. Pressure Switch Adjustment. …The Hayward H-Series' Finn Plate cupro-nickel heat exchanger has special V-groove design for faster heating and longer life. Hayward Universal H-Series, Low NOx, 250,000 BTU, Propane Gas, Pool and Spa Heater delivers energy efficient heating to your pool's water that you can trust. Hayward Universal H-Series - Versatility & PowerThe Hayward Heater HS code indicates that either your water temperature has exceeded a maximum of 104°F or the water temperature is changing at an unusual rate (faster than 6°F in 60 seconds or less while the heater) is on and firing.Residential: Heaters. Hayward has an advanced lineup of heaters and heat-cool pumps to deliver the ultimate control of water temperature and efficiency. Learn More. Download Assets. 49 Items.Universal HC Series dual-fuel technology gas heaters are uniquely engineered for use with Hayward® plumbing adapters, making them an easy drop-in replacement for other heater brands. The heat exchanger is made from cupro nickel for added reliability, and the easy-out air/gas mixing orifice makes propane conversion fast and simple.The Hayward Universal H-Series gas heater is the “universal” energy efficient remedy for any new or existing pool or spa. An industry leading hydraulic design reduces circulation pump run time to provide energy savings of up to 18% when compared to less efficient competitors. The energy efficiency of the Universal H-Series gas heater ...LO Code Pages 40-43 IF Code Pages 44-46 AC Code Page 47 AO Code Page 48-50 ... Heater must then be in Spa or Pool Mode for operation. The heater will ... Hayward Part # FDXLFSKF30 (Qty. 10) Step 1: Page 14 Verify incoming voltage to heater is present (110-125 or 220-245 VAC), if Wiring the heater to the load side of the timer or controller will not result in a 2-minute delay if the pump primes quickly enough to activate the heater’s water pressure switch. If the pump is slow to prime the heater may display an “LO” fault code and will take 2 minutes to automatically restart. If the pump has primed, this You need to put the heater in STANDBY Mode to get the bO code on the heater display. Press the mode button once to get the heater in STANDBY Mode. First, press and hold on to the Down key. Then, press and hold down the MODE key as well. You need to keep holding both keys for about three seconds. At this point, the “bO” message …Show pool professionals that sell/service these specific products (restricts search to include only companies that sell/service each item checked):The Universal H-Series 400,000 BTU Natural Gas Pool & Spa Heater from Hayward provides reliable, long-lasting comfort for pools and spas with a surface area up to 1,200 ft. Built with a durable cupro nickel heat exchanger, it offers exceptional protection against corrosion and premature failure caused by unbalanced water chemistry, ensuring you ...Learn the basics of tankless water heater installation and replacement, including the cost, materials and tools needed to get the job done. By clicking "TRY IT", I agree to receive...Hayward Pool Products Inc is a leading manufacturer of high-quality pool equipment, including pumps, filters, heaters, and cleaners. If you’re lucky enough to own one of their prod...Faulty water temperature switch, malfunctioning vent pressure switch, and defective temperature limit switch are accountable for displaying the Hayward pool heater LO code. Also, the damaged flow switch diaphragm and clogged filter are responsible for showing this code on your pool heater. However, going through the article, you will learn all about reasons behind LOSo the H250 with an input of 250,000 BTU’s actually puts 210,000 BTU’s into the water per hour. Discounting heat loss (which there is always some) if you are using a Hayward gas heaters to heat the 18,000 gallon pool we have discussed above you will need: 22.58 therms of natural gas. 24.75 gallons of propane.My Hayward heater is currently showing the LO error, which I understand means the flow of water through it is too low to kick the flow switch. My variable speed pump ...Apr 22, 2023 · 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. Pool heater question. This is a raypak pool heater manifold. Have a water sw open code. Where’s the switch. There two sets of wires running to probes. Ones a thermometer and the other is this little brass plug with two terminals coming off it. I’ve removed it and it’s not a switch. Thoughts ?Answering a viewers request on how to add and program a newly installed heater to a Hayward OmniLogic Automation system.The Hayward Universal H-Series gas heater is the "universal" energy efficient remedy for any new or existing pool or spa. An industry leading hydraulic design reduces circulation pump run time to provide energy savings of up to 18% when compared to …My hayward H250FDN pool heater runs for about a minute then the code comes up LO. I had a technician out and he checked all the safetys and they were good. I had patched a hole in the heat exchanger j …One of the most common calls we receive during season is the FLO error on a pool heater. Learn more about what causes this error and how we resolve it.Aug 21, 2023 · Check the Gas Valve. Start by ensuring that the gas valve is open and allowing the flow of gas to the pool heater. If the gas valve is closed or partially closed, the heater won’t receive the necessary fuel to ignite. Make sure the valve is fully open and functioning correctly. 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! This unit is perfect for the environmentally conscious Pool and Spa owner thanks to its Low NOx (Nitrogen Oxide) capabilities. #1. I have Hayward H150FDN Universal H-Series, Low NOx, 150,000 BTU, Natural Gas, Pool and Spa Heater and I am getting a LO code with is a flow problem. I …Reno, Nev., is located further to the west than Los Angeles, Calif. Reno runs along the longitude of 119 degrees and 49 minutes west, while Los Angeles sits along a longitude of 11...Hayward Pool Products Inc is a leading manufacturer of high-quality pool equipment, including pumps, filters, heaters, and cleaners. If you’re lucky enough to own one of their prod...Hayward makes a range of pool filters, and only some of these filters require backwashing. The filters that do require backwashing are often fitted with the Hayward Vari-Flo multip...Propane heaters can make cold winter nights a lot more bearable. Here's a list of some of the best indoor and outdoor propane heaters to keep you warm this winter season. If you bu...Aug 21, 2023 · Check the Gas Valve. Start by ensuring that the gas valve is open and allowing the flow of gas to the pool heater. If the gas valve is closed or partially closed, the heater won’t receive the necessary fuel to ignite. Make sure the valve is fully open and functioning correctly. Heater Steps to Turn On; Gas Pool Heater: 1. Ensure that the gas supply is turned on. 2. Turn the heater’s thermostat to the lowest setting. 3. Switch the heater on. 4. Gradually increase the temperature setting to your desired level. Electric Pool Heater: 1. Ensure the solar panels are clean and the valves are open. 2. Turn the system on. 3.Universal HC Series dual-fuel technology gas heaters are uniquely engineered for use with Hayward® plumbing adapters, making them an easy drop-in replacement for other heater brands. The heat exchanger is made from cupro nickel for added reliability, and the easy-out air/gas mixing orifice makes propane conversion fast and simple.When your Hayward heater flashes the ‘LO’ code, it’s alerting you to potential problems that need your immediate attention. Understanding the common causes helps you to troubleshoot effectively and get your heater back to its normal function swiftly. PREMIUM PERFORMANCE: The Hayward Universal H-Series 250,000 BTU Natural Gas Heater delivers fast premium heating performance for years of reliable, long-lasting comfort. CORROSION PROTECTION: The Universal H-Series boasts exceptional protection against corrosion and premature failure caused by unbalanced water chemistry. PREMIUM PERFORMANCE: The Hayward Universal H-Series 250,000 BTU Natural Gas Heater delivers fast premium heating performance for years of reliable, long-lasting comfort. CORROSION PROTECTION: The Universal H-Series boasts exceptional protection against corrosion and premature failure caused by unbalanced water chemistry.Pomeade IDXL2DB1930 Display Board Replacement for Hayward Heater IDXL2DB1930 Display Board, Compatible with Hayward Universal H-Series Low Nox Induced Draft Heater, H400FDN HD150FDN dummy Hayward W3H150FDP Universal H-Series 150,000 BTU Propane Pool and Spa Heater for In-Ground Pools and SpasPool Heaters - Hayward Pool Products | Hayward Pool Products. Home. Products. Residential: Heaters. Hayward has an advanced lineup of heaters and heat-cool …This water pressure switch is designed to use with Hayward Universal H-Series Low NOx pool heater models H150FDN, H150FDP, H200FDN, H200FDP, H250FDN, H250FDP, H300FDN, H300FDP, H350FDN, H350FDP, H400FDN, H400FDP.INNOVATION MADE EASY. Hayward Commercial Aquatics offers a full range of industry-leading innovative products designed to work together as one total system to help every commercial pool perform at its absolute best. Our products set the technological standard while providing unmatched performance, efficiency, reliability, versatility and ease ...For people using gas water heaters, two options are offered--natural gas or propane. According to Energy Star, 15 percent of a home’s energy use is attributed to heating water. Bot...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%! This unit is perfect for the environmentally conscious Pool and Spa owner thanks to its Low NOx capabilities.Specifications: Product Code: HDF275. Heating Capacity: 275,000 BTU. Fuel Options: Dual fuel capability - Propane or Natural Gas. Advanced Technology: Utilizes cutting-edge technology for efficient combustion and heat transfer. Temperature Control: Digital display and user-friendly interface for accurate temperature regulation.Press the Up and Down button again to reset the desired maximum pool temperature. Finally, turn on the heater system, and the IF code problem should be solved. 2. Low Gas Pressure. Low and insufficient gas supply or gas pressure is the high possible reason behind your Hayward pool heater ignition failure.Hayward makes a range of pool filters, and only some of these filters require backwashing. The filters that do require backwashing are often fitted with the Hayward Vari-Flo multip...Dec 2, 2021 · How to fix it: Check that pool pump is receiving enough water. Ensure that your pool pump is sending water to the heat pump. For variable speed pool pumps, try putting the pump speed up a notch Check for any clogs or backups causing poor water circulation. The same is true if what you use is in your pool is the Raypak pool heater. PREMIUM PERFORMANCE: The Hayward Universal H-Series 250,000 BTU Natural Gas Heater delivers fast premium heating performance for years of reliable, long-lasting comfort. CORROSION PROTECTION: The Universal H-Series boasts exceptional protection against corrosion and premature failure caused by unbalanced water chemistry. PitschPlumbing. Generally, LO refers to the pressure switch, water pressure. This can be caused by either the diaphram in the flow switch has failed or the filters is clogged and/or pump is unable to make enough pressure to make the switch. Open the front panel of the heater and look up in to the right. You will see a round part with 2 wires ...12 Apr 2020 ... Pool Basics: How To Start/Light a Hayward H-Series Pool Heater ... Hayward H100ID Pool heater ... I fixed Lo error! hayward spa heater was ...Nov 8, 2022 · If you're looking for help fixing your Hayward Pool Heaters, look no further! Our comprehensive Hayward Pool Heaters error code guide will explain common iss... First, reset your heater thermostat. Now, set the temperature point below 104 degrees. Then, set the function “Ok”. Always keep the temperature under 104 degrees to allow the heater to heat the water at this temperature. Note: Learn how to fix CE code on Hayward pool heater. 4.Hayward H-Series Heater Intergrated Control Circuit Board | IDXL2ICB1931. THIS IS USED IN THE HAYWARD H SERIES LO-NOX HEATERS MADE AFTER 9-20-2004. THE BOARD HAS 3 AMP STYLE PLUG FEMALE CONNECTORS: 1- 4 PIN, 1- 3 PIN, 1 - 2 PIN. THERE IS ALSO A PRESSURE SWITCH / HIGH LIMIT 6 PIN MALE CONNECTOR AND A 3 PIN MALE CONNECTOR FOR THE TEMP SENSOR. PREMIUM PERFORMANCE: The Hayward Universal H-Series 250,000 BTU Natural Gas Heater delivers fast premium heating performance for years of reliable, long-lasting comfort. CORROSION PROTECTION: The Universal H-Series boasts exceptional protection against corrosion and premature failure caused by unbalanced water chemistry. H Series Low NOx 200K Pool Heater Natural Gas. HEATER-UNIVERSAL 150K NATURAL LONX. Hayward H-Series LO NOx Heater 250,000 BTU Natural Gas. Hayward H-Series LO NOx Heater 250,000 BTU Propane Gas. Hayward H-Series LO NOx Heater 350,000 BTU Propane Gas. Hayward H-Series LO NOx Heater 400,000 BTU Natural Gas. …The Hayward Universal H-Series gas heater is the “universal” energy efficient remedy for any new or existing pool or spa. An industry leading hydraulic design reduces circulation pump run time to provide energy savings of up to 18% when compared to less efficient competitors.The SF code on your Hayward heater’s display stands for “Stack Flue Sensor Failure.”. This code indicates that there’s a problem with the sensor responsible for monitoring the flue gases in your heater. Flue gases are the byproducts of combustion, and monitoring them is crucial for safety reasons. Common Causes of SF Code.The Universal H-Series Low NOx heater has an 84 percent industry-leading thermal efficiency and complies with all current California air quality emission standards. The low NOx emission makes it a perfect choice for the environmentally concerned pool owner. Enjoy a warmer pool this season without your fuel costs skyrocketing.However, the Hayward heater is now giving an LO code, and the service light is on. I’m trying to figure out if this is something I can troubleshoot/fix myself, or if I need a pool or gas technician. Pump seems to be running fine. Psi on the sand filter looks to be around 5. Is this low, and does that maybe indicate it’s a filter issue?Turn off your heater, wait a few minutes, then power it back on. If the AO Code persists, move on to the next step. Check the wiring: Inspect the wiring between the blower vacuum switch and the control board. Look for loose connections, damaged wires, or other signs of wear and tear. If you spot any issues, call a professional for assistance.My hayward H250FDN pool heater runs for about a minute then the code comes up LO. I had a technician out and he checked all the safetys and they were good. I had patched a hole in the heat exchanger j …HU-429948972. 3 years ago. Hi I just hooked up a new 150,000 Hayward. With pump on low speed I get the LO code. So I put on high speed and LO code immediately goes away but then within 30 seconds I get HS code and shut down. 724-977-7371. Like.NEW Hayward Universal H-Series Low NOx heater combines industry-leading hydraulic performance; environmentally responsible low NOx emissions and a standard cupro nickel heat exchanger with a low profile appearance, lighter weight design, independent left or right side electric, water and gas connections plus 2" x 2 1/2" CPVC union connections ...Universal H-Series Propane Gas 150,000 BTU Low NOx. Hayward. SKU: W3H150FDP. The Universal H-Series is an energy efficient, high performance, installation adaptable commitment to the pool service professional. Add to Compare. Add to Export. 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! This unit is perfect for the environmentally conscious Pool and Spa owner thanks to its Low NOx (Nitrogen Oxide) capabilities.

Electric – the energy where this heater comes from is through electricity. An electric heater is usually made of an electrical resistor, and it works throughout the principle of Joule Heating. Solar – Through the help of the sun’s heat and solar panels, the water heats, then the water from the pool has been pumped into the panels. It is heated before throwing it …. Schuyler hill funeral home photos

lo hayward heater

The Universal H-Series Low NOx heater has an 84 percent industry-leading thermal efficiency and complies with all current California air quality emission standards. The low NOx emission makes it a perfect choice for the environmentally concerned pool owner. Enjoy a warmer pool this season without your fuel costs skyrocketing. Welcome to the Hayward Universal H-Series and ASME Gas Pool Heater training video. This video is intended for authorized personnel only, qualified in pool an...NOTE: the maximum temperature set point is 104° F. 13. Hayward H400FDN | Universal H Series Troubleshooting Guide - Page 14. in bypass mode for external control. Step 1 …Learn the basics of tankless water heater installation and replacement, including the cost, materials and tools needed to get the job done. By clicking "TRY IT", I agree to receive...Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. Gain insight. Support. ... Phase Heaters: 1.0000: Pool Type: In Ground: Product Dimensions: 24 " x 25 " x 29.5 "Product Height: 24 in: Product Length: 29.5 in: Product Weight: 165 lb: Product Width:Jul 21, 2013 47,820 Northern NJ Pool Size 35000 Surface Plaster Chlorine Salt Water Generator SWG Type Pentair Intellichlor IC-60I have Hayward H150FDN Universal H-Series, Low NOx, 150,000 BTU, Natural Gas, Pool and Spa Heater and I am getting a LO code with is a flow problem. I have my intermatic timer set for 755am to turn on and give my equipment power, then at 8am the Hayward pump turn on.Available in 150,000, 200,000, 250, 000, and 400,000 BTUs, the Universal H-Series heater can raise the temperature of an 800-gallon pool 30 degrees in less than an hour—you’ll feel the benefits the moment you step into the water. The Hayward Universal H-Series Low NOx can be added to inground pool kits sold by Pool Warehouse!This water pressure switch is designed to use with Hayward Universal H-Series Low NOx pool heater models H150FDN, H150FDP, H200FDN, H200FDP, H250FDN, H250FDP, H300FDN, H300FDP, H350FDN, H350FDP, H400FDN, H400FDP.Description: The Hayward Universal H-Series Dual Fuel Heater, boasting a commanding 275,000 BTU capacity, is a versatile heating solution engineered to proficiently regulate the temperature of your pool or spa. Crafted with advanced technology, this heater ensures rapid heating and accurate temperature control, enhancing your overall aquatic ...LO on Hayward Hseries Pool heater. 2 years in October. H150 or 250. A week Backwash look for air leaks backwash. It - Answered by a verified Pool and Spa ExpertThe Hayward H-Series' Finn Plate cupro-nickel heat exchanger has special V-groove design for faster heating and longer life. Hayward Universal H-Series, Low NOx, 250,000 BTU, Propane Gas, Pool and Spa Heater delivers energy efficient heating to your pool's water that you can trust. Hayward Universal H-Series - Versatility & PowerThe SF code on your Hayward heater’s display stands for “Stack Flue Sensor Failure.”. This code indicates that there’s a problem with the sensor responsible for monitoring the flue gases in your heater. Flue gases are the byproducts of combustion, and monitoring them is crucial for safety reasons. Common Causes of SF Code.Hayward Pool Products Inc is a leading manufacturer of high-quality pool equipment, including pumps, filters, heaters, and cleaners. If you’re lucky enough to own one of their prod...Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. Gain insight. Support. ... Phase Heaters: 1.0000: Platform: Square: Pool Type: In Ground: Product Dimensions: 37 " x 30.5 " x 33.6 "Product Height: 37 in: Product Length: 33.6 in: Product Weight: 245 lb:Universal H-Series ASME heater suited to every setup. Front single-panel access means service is quick and easy. BEST-IN-CLASS HEATING SPEED Universal H-Series ASME heaters boast industry-leading hydraulics, with the 500,000 BTU model achieving the fastest speed-to-heat in its class. Its quick and efficient operation meansFor people using gas water heaters, two options are offered--natural gas or propane. According to Energy Star, 15 percent of a home’s energy use is attributed to heating water. Bot...Hayward H-Series Heater Intergrated Control Circuit Board | IDXL2ICB1931. THIS IS USED IN THE HAYWARD H SERIES LO-NOX HEATERS MADE AFTER 9-20-2004. THE BOARD HAS 3 AMP STYLE PLUG FEMALE CONNECTORS: 1- 4 PIN, 1- 3 PIN, 1 - 2 PIN. THERE IS ALSO A PRESSURE SWITCH / HIGH LIMIT 6 PIN MALE CONNECTOR AND A 3 PIN MALE CONNECTOR FOR THE TEMP SENSOR.Hayward H500FDN Universal H-Series Digital Low NOx Pool Heater; Natural Gas, 500000 BTU, 110/220 V, 60 Hz, 1-Phase, Cupro Nickel . Product Features. Totally managed flow provides exceptional corrosion resistance and erosion protection. Ideal for today’s salt-based electronic chlorination systems; 83% Thermal efficiencyWhen your Hayward heater flashes the ‘LO’ code, it’s alerting you to potential problems that need your immediate attention. Understanding the common causes helps you to troubleshoot effectively and get your heater back to its normal function swiftly..

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