Lo on hayward pool heater

Here I go over some of the most common problems that affect these Hayward, formerly Summit Heat pump or thermopump pool heaters. Flo (no flow) and LP (low pr...

Lo on hayward pool heater. Hayward Commercial Pool's Universal H-Series ASME gas heaters are designed and certified for commercial use. The flagship of our H-Series line encompasses high-end features and construction materials as standard.

Hayward H400FDN Pdf User Manuals. View online or download Hayward H400FDN Owner's Manual, Troubleshooting Manual ... POOL AND SPA/HOT TUB HEATERS. Brand: Hayward | Category: Heater ... LO" Code. 46. Pressure Switch Adjustment. 49. IF" Code. 52. AC" Code. 57. AO" Code. 58. Heat Exchanger: Flow Requirements. 61.

The control board oversees the operation of your heater, including monitoring temperature and safety features. In short, the Hayward Heater bD Code means there is a problem with the control board located on the right side of the heater. This can be caused by an open FC4 Fuse, faulty wiring, or a secondary high voltage fault.Hayward W3HP21104TC Pool Heat Pump - Lo Ambient - 110,000 BTU. Features & Benefits: 100% Titanium Heat Exchanger – Pressure tested, high energy & impervious to corrosion. Ultra Gold Evaporator Fins – Corrosion resistant which increases durability in harsh environments. Vinyl Coated Fan Guard – Protects against debris and the elements.Step 2: Locate the inlet and outlet valves on your pool heater. These are typically labeled with “in” and “out” indicators. Step 3: Turn the valves to the closed position. This will stop the water flow through the pool heater. Step 4: Install a bypass pipe between the inlet and outlet pipes on the pool heater.I have a new Hayward heater. I keep getting a lo code when the pool is turned off. This is a brand new heater and pool. My pool company that installed the pool told me to make sure I'm getting proper water flow in the system. But didn't tell me how to do this. Do I do it on the Hayward...The 150,000 btu/hr heater requires a minimum of 20 gpm. You can try to adjust the pressure switch as described in the manual. In my opinion, a flow switch will be the best solution. The Hayward aquarite flow switch turns on at 15 gpm and off at 12 gpm. It would work but I think that the flow is too low.Depending on the size you choose, this pool heater delivers an output of 150,000 to 400,000 BTUs per hour. Hayward's universal heater runs on natural gas, has low environmental impact, and meets ...

Here are a few tips to help you get your heater ready for the winter months: 1. Drain the water from your pool heater. This will help prevent any damage to the unit from freezing water. 2. Disconnect the power supply to your pool heater. This will prevent any accidental damage to the unit while you are working on it. 3.Answering a viewers request on how to add and program a newly installed heater to a Hayward OmniLogic Automation system.Print. Heater-Universial 200 Lp Lo Nx Item #H200FDP. The Universal H-Series is an energy efficient, high performance, installation adaptable commitment to the pool service professional. Standard Cupro Nickel Heat Exchanger. Excellent Salt Water and chemical Corrosion Resistance. Exclusive 'Totally Managed' Cupro Nickel Heat Exchanger Water Flow.Start heater again. Does low side pressure drop below 30 psi for R-22 unit or 80 psi on a R-410A unit? Figure C. Replace LP switch. See Note 2 below NO Abandon existing switch on Hayward R-22 units. Replacement switch is a screw on switch. Use a swivel tee on the low side access port. On Summit and R-410A (4T) Hayward units the existing switch ...Hayward pool heaters offer several advantages, including affordability, a wide range of options, and user-friendly controls. The company's heaters are designed to be easy to use and install, making them a popular choice for pool owners who want a reliable heating option without breaking the bank. Hayward also offers a range of heater sizes ...

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 ... Shop our wide selection of Hayward Pool Heaters; Return Policy; Product Information. Internet # 311793700. Model # HPPW3H250FDN. Store ...Discover Hayward's commercial heaters for efficient and reliable heating solutions. Perfect for commercial applications. Explore now! ... Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. Gain insight. Support. Support Center; Resources. Pool Financing ...Hayward Universal H-Series Induced Draft Pool Heater 250K BTU Natural Gas W3H250FDN (also known as H250FDN) is energy-efficient. 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. Hayward Universal H-Series Induced Draft Pool Heater represents innovative heating technology for pools ...Here you'll gain easy access to information regarding your favorite Hayward products. Whether you are looking for a Quick Reference Guide, troubleshooting steps, or simply wish to view one of our product support videos, you have come to the right place. ... Learn about maintenance, innovation, pool safety & other insights from Hayward ...Hayward H300FDN. I replaced the pressure switch but still getting a LO signal and heater won't start ... I have a H series Hayward pool heater and it will not ignite. this is an electronic ignition. I get an AO code on the led have replace the vacuum blower switch and get the same problem. ...

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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 ... Shop our wide selection of Hayward Pool Heaters; Return Policy; Product Information. Internet # 311793696. Model # HPPW3H150FDP. Store ...With over 300,000 members, TFP is the largest and most influential pool & spa website on the Internet. The reason is simple: TFPC (Trouble Free Pool Care) is a methodology, not a product that you must purchase. It is being practiced by thousands of pool owners just like you. We are a registered 501(c)3 non-profit that is funded by user donations.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 SpasThe 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 ... Shop our wide selection of Hayward Pool Heaters; Return Policy; Product Information. Internet # 311793698. Model # HPPW3H400FDN. Store SKU ...

typically I will push the spa button which turns the valve actuator to the spa position, once the pump is running I push the heater button on the main control board once I do that the blower turns on then the gas smell is present, then the igniter lights the gas and starts the heater. Universal H-Series Natural Gas 400,000 BTU Low NOx. Hayward. SKU: W3H400FDN. The Universal H-Series is an energy efficient, high performance, installation adaptable commitment to the pool service professional. Add to Compare. Add to Export. Hayward Universal HC-Series pool heaters are the most compact heating solution available. They require 40% less pad space than competitive units, allowing you to enjoy more of your backyard. All Hayward gas heaters utilize a cupro-nickel heat exchanger for value, performance, and reliability. In addition, they offer excellent salt water and ...ECOPOOLTECH -Pool Heater for Above Ground Pools,Pool Heat Pump,12000BTU/hr,Up to 4000gallons,110V~120V/60Hz dummy Hayward H400FDN Universal H-Series 400,000 BTU Pool and Spa Heater, Natural Gas, Low NoxLO 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), ifThe 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.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.What Causes the Hayward Heater LO Code? 1. There Is A Fault With The Water Pressure Switch. How to diagnose if the water pressure switch has a fault. LO CODE FIXES. Step …

Hayward Pool Heater Troubleshooting: A Comprehensive Guide. If you own a swimming pool, chances are you've invested in a high-quality pool heater to keep the water temperature just right, especially during those chillier days or evenings. One of the popular choices amongst homeowners is the Hayward pool heater, revered for its durability and ...

Hi, we have a Hayward ProHeat Heat Pump w/digital display, when the heater and goldline controls are set for temp above the current temp of the pool the heater comes on and runs for a minute or two, f … read moreVerify the pump is running & adequate water is flowing through heater. "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. 44; Hayward HDF400 | Universal HC Series Heater Troubleshooting Guide - Page 45 11.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 & PowerHayward H-Series heater for above ground pools and spas combines reliable technology with ease of operation and superior performance. H-Series heaters boast industry-leading hydraulic performance coupled with a 135,000 BTU rating for faster speed-to-heat capability. Their intuitive electronic panel is also quick and easy to operate, so pool ...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 ... Shop our wide selection of Hayward Pool Heaters; Return Policy; Product Information. Internet # 311793696. Model # HPPW3H150FDP. Store ...Hayward Universal H-Series Induced Draft Pool Heater 200K BTU Natural Gas W3H200FDN (also known as H200FDN) is energy-efficient. 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. Hayward Universal H-Series Induced Draft Pool Heater represents innovative heating technology for pools ...Best Overall, Electric: FibroPool Swimming Pool Heat Pump at Amazon ($2,200) Jump to Review. Best Overall, Gas: Raypak Digital Low NOx Natural Gas 266,000 BTU Pool Heater at Amazon ($2,999) Jump to Review. Best Propane: Hayward Universal H-Series at Amazon ($3,999) Jump to Review.Adjust the water flow or call a professional if the pressure is too low. Clean the Filter: A dirty or clogged filter can cause Hayward Heater CE Code errors. Clean the filter thoroughly and replace it if necessary. This will improve the heater’s efficiency and prevent future issues. Inspect the Ignition System: If the above steps do not ...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.Many choose Hayward pool heaters to keep their pool water comfortable and warm. However, sometimes these heaters can experience issues that require a reset. 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. This simple process can resolve many common issues and get your ...

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Hayward W3H135FDN H-Series 135K BTU Natural Gas Above Ground Pool and Spa Heater. Hayward H-Series heater for above ground pools and spas combines reliable technology with ease of operation and superior performance. H-Series heaters boast industry-leading hydraulic performance coupled with a 135,000 BTU rating for faster speed-to-heat capability.How can you reset your Hayward Pool Heater? To reset your Hayward pool heater, first, select the ‘MODE’ button from the keypad. Then keep cycling between ‘STANDBY’ and ‘MODE’. Your heater will reset. Why does my Hayward Pool Heater keep shutting off? Your Hayward pool heater cycles on and off mainly due to overheating.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 ... Shop our wide selection of Hayward Pool Heaters; Return Policy; Product Information. Internet # 311793700. Model # HPPW3H250FDN. Store ...Dec 30, 2021 ... Critter ruins the control circuits of a pool heater. In this case, we needed to swap out the display board and the Control board.How can you reset your Hayward Pool Heater? To reset your Hayward pool heater, first, select the ‘MODE’ button from the keypad. Then keep cycling between ‘STANDBY’ and ‘MODE’. Your heater will reset. Why does my Hayward Pool Heater keep shutting off? Your Hayward pool heater cycles on and off mainly due to overheating.The LO code on a Hayward heater means Limit Open, where one of the limit switches is not closing to complete the circuit. To clear the LO code, fix or replace the wiring on the limit switches and any other issues with your heater’s limit switch, and you may need to do a backwash to clear out any obstructions.Best Pool Heaters: Comparison Table. Best Pool Heaters 2022: Reviews. BEST OVERALL: Hayward H400FDN Universal H-Series 400,000 BTU Pool and Spa Heater. BEST SOLAR HEATER FOR ABOVE GROUND POOLS: Intex 28685 Solar Heater Mat. BEST ABOVE GROUND POOL HEATER: Hayward HP50TA 50,000 BTU Heat Pro Heat Pump.Posted April 16, 2010. The "LO" code means "Loop Open", referring to your safety loop switches. Most likely it's your pressure switch that's open due to low water flow usually caused by a dirty filter. The "60" code is really "bO" meaning "bypass operation" in which your heater's internal thermostat is bypassed so as to control the set ...Hayward pool heater H150FDN/P shows LO on screen. Less than 2 months. Just today had to reset salt cell - Answered by a verified Pool and Spa Expert ... Hayward pool heater H150FDN/P... Hayward pool heater H150FDN/P shows LO on screen. Contractor's Assistant: Who makes your HVAC unit? How old is it? Less than 2 months. ….

Hayward H500FDN Natural Gas Pool Heater 500K BTU. Larger Photo Email A Friend. Our Price: $4,936.00. Sale Price: $ 3,999.00. Savings: $937.00. Special Instructions: Pick up in store price $3499.So 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.These Hayward pool heater troubleshooting codes and explanations will help you fix the problem. Skip to content ☏ Click to call: 407-786-0000. Services Menu Toggle. Pool Heat Pump Repair Menu Toggle. Schedule Your Repair; Pool Heater Troubleshooting Menu Toggle.1. First, check that your filter pump is On. Next, ensure the heater is enabled and the set point is higher than the current water temperature. Select the bow to water. Press the heater tile to enter the heater's menu. 2. Ensure the heater is enabled and the set point is higher than the current water temperature.However, in a gas heater, the exchanger can begin to cavitate and make a loud banging noise. In my experience, about 1/3 of pool heater service calls are actually due to water flow issues. Knowing …Checking the Pool Heater Circuit Breaker. 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.Press and hold the "Up" and "Down" buttons simultaneously, according to the Stanley Louis Company. Hold the buttons until the indicator light rapidly flashes and the digital display shows the maximum temperature-lock setting. Typically, this is in the range of 90-degrees F. Release both buttons. Select the desired water temperature with the ...Follow the included steps to place the heater in bypass mode for external control. Step 1. Press the 'MENU ICON' button to place the heater in 'STANDBY' mode. Step. The 'SPA' indicator should illuminate & the display should show the Max Temp set point. Step 2. Press and hold the minus & plus buttons for 3 seconds.>Pool Supply Unlimited has some of the best prices when shopping for Hayward Universal H-Series Low NOx Induced Draft Pool & Spa Heater | 150,000 BTU | Propane | W3H150FDP ... All Hayward heat exchangers are now constructed with highly resilient Cupro Nickel for greater durability and longevity even in salt-based, high flow or aggressive water ...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 ... Lo on hayward pool heater, Hayward Pool Product Registration. Register your Hayward equipment now to receive a 90 day extended warranty, expert advice, rebate offers & more!*. June 30, 2023 NOTICE: Any applicable warranty coverage for a product shall not commence prior to the delivery date of that product notwithstanding anything stated elsewhere to the contrary., Follow these steps for a safe power down: Turn Off Power: Locate the power source and switch off the power supply to the heater. This step ensures safety during the disconnection process. Unplug and Label: Unplug all electrical connections from the heater, including power cords and control panels., Here you'll gain easy access to information regarding your favorite Hayward products. Whether you are looking for a Quick Reference Guide, troubleshooting steps, or simply wish to view one of our product support videos, you have come to the right place. ... Learn about maintenance, innovation, pool safety & other insights from Hayward ..., Hayward and Pentair Pool Heaters’s cupro heat exchanger is designed differently but has similar thermal efficiency (about 82%). Pentair EC462025 is designed for smaller water flows (up to 70 gpm), while Hayward W3H150FDN works perfectly up to 125 gpm. You can rotate a control panel in three directions on top of the Pentair EC462025 …, Hayward W3H300FDN Universal H-Series Low NOx 300,000 BTU Natural Gas Residential Pool and Spa Heater with Bundle* Warranty Better Buy Pool Supply will provide you with the Full 2 Year Manufacturer's Warranty plus 1 Year Installation Warranty upon installation by our professionals. From the Manufacturer The Universal H-Series is an energy efficient, high performance, installation […], Step 2: Close all valves leading into and out of the heater. This includes both intake and discharge valves. "It is crucial that all valves leading in and out of the heater remain closed during draining to prevent unwanted water flow, ". Step 3: Locate the drainage cap located at the bottom of your pool pump., Provides 1° to 1.5° F temp rise/hour. EcoSmart pool heaters are compact and easy to install for a new or existing pool. Set your temperature digitally to increments of 1° , set it and forget it. Uses the latest flow sensor technology. Can be used as an alternative to or booster to heat pump., My Hayward H100ID stopped heating the swimming pool water. I spent 3 afternoons and evenings of my free time pulling my hair out trying to figure out the pr..., Hayward pool heaters tend to be more affordable than comparable Pentair models. Their millivolt units start around $1300, while digital thermostat heaters cost $1600 and up. This makes them a great option for buyers on a tight budget. Efficiency. Most Hayward heaters offer thermal efficiencies of 83-84%. This means 83-84% of the fuel is ..., Was: $3,903.99. Quantity: Select all. Add selected to cart. Description. 0 Reviews. This Hayward W3HP21404T HeatPro Heat Pump 140K BTU (also known as HP21404T) is Hayward's most powerful Pool Heat Pump with 140,000 BTU of heating power! You can't get a more powerful pool heater from Hayward or from anyone else!, 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, Find helpful customer reviews and review ratings for Hayward H100IDP1 H-Series 100,000 BTU Above Ground Pool & Spa Heater, Propane, Low Nox at Amazon.com. Read honest and unbiased product reviews from our users., This blower vacuum 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. Weighs 4.8 pounds., 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., Hayward - Front Header Assembly. SKU: 614836. Details: FRONT HEADER ASS'Y. Availability: In Stock. $569.99. Add to Cart. Keep your pool equipment running strong with Hayward H-Series H250IDL2 - H400IDL2 Low NOx Pool Heater Parts., 2. Defective diaphragm valve or gas switch inside the pool heater. When we put the NG heater in for the pool, I also had a fire pit and BBQ on the same line. The gas company asked me for the total number of therms I had to supply to all water heaters, ovens, pool heaters, etc., Upon receipt of such notifi cation we shall decide whether to repair such parts or replace any pool heater, reserving at all times the right to inspect in order to verify any claimed defect. Page 45: Service Parts SERVICE PARTS USE ONLY HAYWARD GENUINE REPLACEMENT PARTS Pomona, CA Clemmons, NC Nashville, TN Tel: 908-355-7995 …, We bought a new Hayward above ground pool heater H1001D and converted it to propane from natural gas with the appropriate conversion kit. When we turn the temperature guage on it clicks like it's work …, 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 ..., Verify the pump is running & adequate water is flowing through heater. "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. 44; Hayward HDF400 | Universal HC Series Heater Troubleshooting Guide - Page 45 11., For each problem that brings about the Hayward pool heater LO code, there are many possible solutions as shall be explained in the sections below. The Hayward heater LO code indicates a fault in the temperature limit switch, vent pressure switch, or water pressure switch. To fix it, ensure the pump is on, is wired and connected well, the water ..., Hayward Universal H Series 150K BTU Natural Gas Pool Heater -( H150FDN , Hayward ) Pool Products, Pumps & Parts. Search for: Today's Homeowner with Danny Lipford. How Much Do Trane Air Conditioning Units Cost? April 25, 2024; Top 5 Best Moving Companies for Long-Distance Moving April 22, 2024;, HI My Hayward Hseries pool heater shows a LO and stops working when it rains. My temp dropped from 92 to 80. Contractor's Assistant: Who manufactured the pool? I can't recall. It is a semi-inground purchased through Great Escape 5 years ago. Heater is 5 years old. I replaced the heating tubes last summer., View and Download Hayward HC Series troubleshooting manual online. Universal Heater. ... In ground pool/spa gas heaters (44 pages) ... may relate to water flow. Verify the pump is running & adequate water is flowing through heater. “LO” is NORMAL when the pump is turned off or there is insufficient water flow. Test pressure switch voltage ..., According to the H-Series pool heater owner's manual by Hayward, cleaning your heater filters is one of the most important steps you can take. That is to say, regularly cleaning these filters will lead to a longer lasting and better working pool heater. 1. Remove Filter Cover or Gain Access., Home / Pool Equipment / Pool Heaters & Heat Pumps / Hayward Pool Heater Troubleshooting Hayward Pool Heater Troubleshooting September 24, 2019 October 12, 2023 Mark Garcia, Locate the pilot light assembly on your pool heater. 2. Turn the gas control knob to the “Off” position and wait for 5 minutes. 3. Turn the knob to the “Pilot” position and press it down. 4. While holding down the knob, use a long lighter or match to ignite the pilot. 5., I have a new Hayward heater. I keep getting a lo code when the pool is turned off. This is a brand new heater and pool. My pool company that installed the pool told me to make sure I’m getting proper water flow in the system. But didn’t tell me how to do this. Do I do it on the Hayward..., 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., Universal H-Series Natural Gas 400,000 BTU Low NOx. Hayward. SKU: W3H400FDN. The Universal H-Series is an energy efficient, high performance, installation adaptable commitment to the pool service professional. Add to Compare. Add to Export., ECOPOOLTECH -Pool Heater for Above Ground Pools,Pool Heat Pump,12000BTU/hr,Up to 4000gallons,110V~120V/60Hz dummy Hayward H400FDN Universal H-Series 400,000 BTU Pool and Spa Heater, Natural Gas, Low Nox, 303. 159K views 5 years ago. 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..., 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.