Hayward pool heater says lo

Model W3H150FDP. Cupro-Nickel heat exchanger with patented "V" baffle design increases the life of your unit and reduces heating time. Patented Polymer Header design provides superior hydraulic performance which saves energy and protects against damage due to high flow conditions. 2" x 2 1/2" CPVC unions.

Hayward H-Series Heater Control Bezel Key Pad Assembly | IDXL2BKP1930. 4.7 (3 REVIEWS) $317.53. Quantity. Flat Rate Shipping $11.95. Platinum Preferred Manufacturer. Proposition 65 Warning. Purchase options.Model W3H150FDP. Cupro-Nickel heat exchanger with patented "V" baffle design increases the life of your unit and reduces heating time. Patented Polymer Header design provides superior hydraulic performance which saves energy and protects against damage due to high flow conditions. 2" x 2 1/2" CPVC unions.The Hayward pool heater spa mode is designed to maintain a specific “spa-like” temperature in the pool. To use this mode, enable “Spa mode” from the control panel, set the required temperature, and let the pool heater warm the water. Once ready, test the water. This process is a joy to behold for those who want to soak themselves in ...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...Low and High Salt Alarms can be observed when the salt in parts per million is outside of the expected range in a Body Of Water. Salt Chlorination takes place while the Salt Level is between 2400 and 3800 ppm . A Low Salt Alarm is generated when the Salt ppm is between 2400 and 2700 ppm for Standard. For Low Salt Monitoring it is between 800 ...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 ExpertFind a Hayward product dealer near you. For any inquiries or assistance, please contact us via email. We are here to help! Get expert assistance for your pool-related queries! Contact our dedicated team today for personalized solutions, advice, and top-notch support. Reach out via phone at (908) 355-7995 or email for unparalleled customer ...Pool heater will not ignite. Plenty of propane. Indicator shows "Lo" on readout when set for pool function. Any suggestions? Contractor's Assistant: Who manufactured the pool? Fox pool, 33 years ago. The heater is a Hayward model H-300, added @ ten years ago. Contractor's Assistant: Who makes your heater? HAYWARD, Model. "H-300"

>Pool Supply Unlimited has parts for Hayward Universal H-Series Low NOx Induced Draft Pool & Spa Heater | 400,000 BTU | Propane | H400FDP. POOL. ... Hayward Heater Display Board H-Series Low NOx Models | IDXL2DB1930 ... ayudarle a diagnosticar los problemas de su equipo y escuchar acerca de cómo podemos mejorar y todo lo que está en su mente ...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 ...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.Dec 13, 2023 · A Hayward LO code is a limit string open error that occurs when any safety circuits on your Hayward pool heater opens. This forces the heater to shut down and go into lockdown to protect your whole equipment from damage. If the heater is connected to the line side of the circuit it will be powered at all times. In this situation, when the pump shuts down the heater will display a fault code of “LO”. If there is a call for heat and the pump then restarts there will be a 2-minute delay for the heater to fire. After the pump has been running for atHayward 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 ...Jun 13, 2022 ... Got a heated pool? This Hayward HeatPro heat pump pool heater stopped ... Hayward Pool Heater LO Code? Watch This!! Touched By The Sun Pools ... 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 H-Series Heater Control Bezel Key Pad Assembly | IDXL2BKP1930. 4.7 (3 REVIEWS) $317.53. Quantity. Flat Rate Shipping $11.95. Platinum Preferred Manufacturer. Proposition 65 Warning. Purchase options.Find helpful customer reviews and review ratings for Hayward H400FDN Universal H-Series 400,000 BTU Pool and Spa Heater, Natural Gas, Low Nox at Amazon.com. Read honest and unbiased product reviews from our users.Enter a postal code to find the nearest Hayward authorized pool professional. Postal Code: How far from the above postal code do you want to search? Enter the miles in the box below. Minimum of 10 miles, maximum of 100. ... Show pool professionals that sell/service these specific products (restricts search to include only companies that sell ...What Does A High Limit Switch Do On A Pool Heater. The high limit switch on a Hayward pool heater is a safety device that is wired in series with the gas valve and the thermostat. If the water temperature going into the pool heater exceeds the maximum set, the gas valve will close, shutting off gas to the burners.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 have my intermatic timer set for 755am to turn on and give my equipment power, then at 8am the Hayward pump turn on. Can the heater be on...

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Hayward is always looking for ways to make pool and spa ownership as simple and effortless as possible. The latest example of this is the new Universal H-Series pool and spa heater. Combining advanced technology with universal-fit flexibility, it's a smart choice for virtually any new installation or existing system upgrade delivering state of- the-industry performance, outstanding energy ... 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. 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 ...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 …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...HeatPro Heat-Cool Pump 140k BTU. High performance, energy-efficient HeatPro heat pumps quietly and economically maintain the ideal water temperature at all times. HeatPro features the industry's only standard Ultra Gold corrosion resistant evaporator fin which provides extreme durability, especially in coastal environments.

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.Pool Covers. In addition to heating your pool or spa, you can enhance the warming effect by adding a cover to maintain a comfortable water temperature. Using a swimming pool cover when the pool is not in use can reduce your heating costs by as much as 50-70%. Read Pool Covers Save Water and Energy to learn about additional benefits.Step 1. Turn off the power supply to the pool heater. Step 2. Wait for at least five minutes to allow the heater to cool down. Step 3. Turn the power back on and press the reset button. This button is typically located near the heater’s control panel or on the heater’s interior.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 secondsHayward Universal H-Series Low NOx Induced Draft Pool & Spa Heater | 400,000 BTU | Propane | W3H400FDP. 5.0 (1 REVIEW) Quantity. As low as $184.52/mo*. Free Shipping.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.Hayward heater worked fine last nite this morning its says lo on screen plenty propane - Answered by a verified Pool and Spa Expert. We use cookies to give you the best possible experience on our website. ... I cannot get the pilot light to ignite on my h400fdp hayward pool heater ...Mar 23, 2023 · Turn off the electricity and gas going to the pool heater. Open the faceplate of the heater, then locate the pronged ignitor. Remove the retaining bracket and screws, then disconnect the ignitor from the motherboard’s wires. Contact the manufacturer for a like-for-like ignitor part number, then attach it to the motherboard’s wires. 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.For hayward pool heater if code repair, check the pressure switch and ensure proper pressure is being reached. Hayward pool heaters display an “if” code when the pressure switch is not closed. This is caused by insufficient water flow, closed valves, air in the system, or a clogged filter. It is important to identify and fix the issue ...Professional Assistance: If you have followed these steps and the IF code persists, it is recommended to contact a professional technician who specializes in pool heater repairs. They have the expertise to diagnose and resolve complex issues and ensure your heater is functioning properly. Hayward Pool Heater LO Code What Does The LO Code Mean?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...

Pool heaters work very straightforwardly: they generate heat to raise the water temperature. As long as they have a reliable water supply, the heater will not overheat. That’s why your unit will display the LO code when there’s something wrong with the water supply. The LO code signifies that there’s a low water pressure condition. […]

Use the “Mode” key to change your heater’s settings. Select the “Standby” Option and put the heater on it. Press the remote’s “Down” key and hold it and then press the Mode key and hold it simultaneously. For 3 seconds, hold down both the “Down” and “Mode” keys as long as the “bo” code doesn’t remove from your ...Dec 6, 2020 ... Hayward Heater on LO. B&L Pools•46K views · 3 ... Hayward Pool Automation - Pro Logic & Aqua Plus Controllers ... Part #1 - Hayward OmniLogic - ...Mar 23, 2023 · Turn off the electricity and gas going to the pool heater. Open the faceplate of the heater, then locate the pronged ignitor. Remove the retaining bracket and screws, then disconnect the ignitor from the motherboard’s wires. Contact the manufacturer for a like-for-like ignitor part number, then attach it to the motherboard’s wires. 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 flow is above the required minimum pressure, the filters are clean.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 ...Randy. I asked you a question about my Hayward pool heater Allier this week but was having connection issues and - Answered by a verified Pool and Spa Expert ... It says LO I asked the guy who installed it and he told me to clean my filter, so we did that and then it worked for maybe another week and stopped again.HeatPro Heat-Cool Pump 140k BTU. High performance, energy-efficient HeatPro heat pumps quietly and economically maintain the ideal water temperature at all times. HeatPro features the industry's only standard Ultra Gold corrosion resistant evaporator fin which provides extreme durability, especially in coastal environments.Offers heating that is energy efficient and environment friendly. Please review the For Your Swimming Pool brochure. Patented bypass design ensures better hydraulic performance. View More Details. BTU Rating: 399900. 199900. 200000. 399900. Pickup at South Loop.

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Steps to Maintain Your Hayward Pool Heater. Step 1: Turn off the power supply and gas valve before performing any maintenance. Step 2: Remove any debris from the heater and surrounding area using a soft brush or vacuum. Step 3: Inspect the heat exchanger for any signs of corrosion or buildup.Service panel says Lo and "service". ... I have a Hayward 135k pool heater that I just installed. I have an HS code on the display. It runs for about 1 minute then displays this code. The temp starts at 50 degrees and climbs rapidly to 56 th ...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. 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 limit string, you’ll need to wait 2 minutes for the automatic restart. Hayward H-Series Above Ground Pool heater is a lightweight but heavy duty heater. Built with the durable cupro nickel heat exchanger which offers exceptional protection against premature corrosion. ... Will keep energy cost down by reducing pump run time to heat your pool. Low-nox emissions meet air quality standards in all low-nox areas ...Step 1. Turn off the power supply to the pool heater. Step 2. Wait for at least five minutes to allow the heater to cool down. Step 3. Turn the power back on and press the reset button. This button is typically located near the heater’s control panel or on the heater’s interior.Turn the thermostat all the way up on the heat pump. These units are not compatible with 3 wire remotes. For 2 wire air switch installations remove the jumper between terminals 1 & 2 and replace it with the 2 wires from your switch. Set the thermostat on the heat pump to the desired temp. Wiring Diagram HPABG / HP380.IDXL2DB1930 Display Board, Pool Heater Replacement Control Panel Keypad Membrane Switch Compatible with Hayward H350FDP & Universal H-Series Heater Models H250IDL2 H350IDL2 H400IDL2. 12. 50+ bought in past month. $4999.We have a Hayward 400 heater and a Hayward ecostar variable speed pump. We tried to turn on the heater last night for the spa and it would turn on and then off a few seconds later. The people in the spa could feel hot water for a few seconds and then it would just come out cold. ….

First, Power cycle the Omni Controller by selecting the power button at the bottom left of the screen, followed by pressing the shutdown option. Once the controller display is shutdown, turn power off using the breaker, wait 60 seconds and power back up. Wait 3 minutes and then check to see if the connection has been re-established.Turn the thermostat all the way up on the heat pump. These units are not compatible with 3 wire remotes. For 2 wire air switch installations remove the jumper between terminals 1 & 2 and replace it with the 2 wires from your switch. Set the thermostat on the heat pump to the desired temp. Wiring Diagram HPABG / HP380.Sep 1, 2011. #7. Yes, that's correct. It allows you to set two different temperature settings for systems that switch between a spa and a pool. For those systems, there should also be another connection or component (such as a flow switch or In-house electronic control system) that tells the heat pump which mode to go to.Hayward products including, quick reference guides, troubleshooting steps, and product support videos. ... Hayward's Role as a Global Leader in Pool Equipment and Automation Systems. Explore (opens in a new tab) IMG Support. IMG Home; ... Heating Capacity (BTU/hr) 150000; 199900; 250000; 399900; 110000; 125000; 140000; 100000; 120000;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.When ordering parts, include the complete pool heater model number listed on the unit's rating plate, located near the junction boxes on the exhaust side of the heater. (Example: HDF400) All ser- vice must be performed by a qualified technician. View and Download Hayward HDF400 installation & operation manual online.Pump is running, water is flowing through heater, heater plugged in, gas on. Service panel says Lo and "service". ... HI, I have a Hayward Pool Heater Lo Hox (I think the name) it is about 40,000 BTU natural gas 240 Volt. Blower moter in side. It has ran great for the past 6 or so years.Hayward - Inground Pool Heater - Universal H-Series - Lo-Nox. Categories. Above Ground Pool Packages; Above Ground Pool Liners . Above Ground Pool Liner Accessories ; ... Lo-Nox - Inground Pool Heater Hayward. MSRP: $3,498.99 Your Price: $2,599.99 (You save $899.00 ) SKU: UPC: * Current Stock: Quantity: Decrease ...1.3 Heater Cycling On And Off. 2 Troubleshooting Steps. 2.1 Check Gas Pressure And Fuel Supply. 2.2 Inspect Air Supply And Venting. 2.3 Ensure Proper Water Flow. 2.4 Clean Filters And Pump. 2.5 Adjust External Bypass If Needed. 3 Tips For Diagnosing Problems. 3.1 Follow The Heater Start Sequence.Model W3H150FDP. Cupro-Nickel heat exchanger with patented "V" baffle design increases the life of your unit and reduces heating time. Patented Polymer Header design provides superior hydraulic performance which saves energy and protects against damage due to high flow conditions. 2" x 2 1/2" CPVC unions. Hayward pool heater says lo, 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., Medallion Energy 3055 Tech Park Way Deland, FL 32724 407-786-0000. Hours Mon-Fri: 8am – 7pm Saturday: 9am – 5pm Sunday: By Appointment , Hayward pool heaters are equipped with a self-diagnostic system that detects faults and shuts the unit down. If your pool heater is displaying a code, follow these steps to reset the unit: 1. Turn the power off to the pool heater at the breaker box. 2. Wait five minutes and then turn the power back on. 3., Step 1 Step 2 Press the ‘Menu’... Page 11 How To: Set a Pump Schedule Follow these steps to program your pump to turn ON & OFF automatically through the Timer’s Menu. Step 1 Step 2 Press the ‘Menu’ repeatedly, until ‘Timers Menu’ appears on the Press the (>) until ‘Filter T1,T2,T3,T4’ or ‘Spa-all’ appears on the display., HI, I have a Hayward Pool Heater Lo Hox (I think the name) it is about 40,000 BTU natural gas 240 Volt. Blower moter in side. It has ran great for the past 6 or so years. Last fall I was in the pool house when it was running (fine). We had a sudden power failure (my wife turned off the pump) it made a bad sound she quickly turned on the pump., Sarasota, FL. Dec 18, 2020. #1. I am getting an LP Error on my electric Hayward heater, which signifies low water pressure. I have turned the valve that normally bypasses the …, Universal ColorLogic® 2.0 Spa - 12V 30FT. Experience excellence with Hayward pool products. From energy-efficient pumps to reliable filters and advanced automation, we make pool care effortless., The Hayward Pro Logic is a multifunction pool controller used to fully manage your pool/spa sys-tem. The Pro Logic can control pumps, valves, lighting, heaters, and chlorination. Although the Pro Logic is easy to use, it is important to completely read through this operating manual before attempting to operate the control., Aug 8, 2021 · NJ. Aug 7, 2021. #1. Hello, I have a H150FDN pool heater. It's worked all summer so far, but last week I noticed that it would turn on for a few minutes then turn off and show Lo. The filter is clean and the output is strong. I ordered a new pressure switch, but in the meantime I took the two wires that connect to the switch and made a jumper ... , Pool Heater Service Call - Hayward Heat Pro Heat Pump with LP Error on display. LP is Low Pressure. We found a leak on the filter dryer, discussed with home..., Medallion Energy 3055 Tech Park Way Deland, FL 32724 407-786-0000. Hours Mon-Fri: 8am – 7pm Saturday: 9am – 5pm Sunday: By Appointment, Hayward Universal H-Series Low NOx Induced Draft Pool & Spa Heater | 200,000 BTU | Propane | W3H200FDP. 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 ..., 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., Hey all, I had a brand new H400FDN heater installed on 12/21/2015. It worked fine up until today. When I turn on the pump, the heater lights flicker and then it goes dead. Turning off the pump and restarting it resulted in the same thing a few times. Now, it appears to just be completely..., Lo-Nox. Before purchasing a heater, a pool owner should become more acquainted with their state health and safety codes. Lo-Nox heaters are a more environmentally safe way to heat your pool. ... Barreling Ahead with Another says: February 12, 2021 at 10:34 AM. ... I am looking to replace our heater. We had a Hayward (either 150 BTU or 200 BTU ..., When it comes to troubleshooting Hayward pool heaters, theres not too much difference between the problem solving process for other gas-fired heaters, made by POOL LOVE CLUB. Saturday, April 6, 2024 ... A LO code on a Hayward heater can be caused by any of the following: a faulty water pressure switch, a faulty vent pressure switch, a faulty ..., We have a hayward pool heater - 21 foot pool. Pool just opened. Turned on heater - Says needs service - temp window says low. Propane is on. I go thru this every year. Contractor's Assistant: Who manufactured the pool? Don't know. Pool is about 5 years old. Tucker pools opens an closes it every year. They just opened it Monday, Sarasota, FL. Dec 18, 2020. #1. I am getting an LP Error on my electric Hayward heater, which signifies low water pressure. I have turned the valve that normally bypasses the …, It now says LO on screen. It's a h 400 propane. Pool and Spa Expert: ... I have an older swimming pool heater a Hayward H400 PED2 that fires up just fine but will shut down in about 2 minutes. When I switch the mode to standby and back to spa the same thing happens., Any advice on a real good brand of filter for a pool would be appreciated though. I just wanted to get one ASAP so I just got that one on Amazon and saved half of what the store wanted for the same filter. ... Hayward Heater LO code. joeg679; Jul 19, 2023; Pumps, Filters, and Plumbing; 2. Replies 22 Views 384. Pumps, Filters, and Plumbing Jul ..., Ensure the proper installation of the main circuit board within the heater. Check the short ground and high voltage issue and take steps to prevent it. 5. Circuit Board's Faulty Fuse. Another factor responsible for displaying the Hayward pool heater ce code is the faulty or blown fuse in the heater's circuit board., You power the heater on you hear a light clicking them immed says LO. I have tried taking it off the Omnilogic - same problem. Submitted: 4 years ago. Category: Pool and Spa. Show More. Show Less. Ask Your Own Pool and Spa Question. Share this conversation. ... I have a Hayward ng pool heater. Low nox H250... it has been sitting idle for two years., 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., What to do if the pilot light for your pool heater is not turning on or if the pilot light is not lasting very long or pilot outage. We'll go over on how to ..., Mark shows us in this video how to do troubleshooting for a heater, he walks us through all of the steps. For all the pool knowledge you're looking for, chec..., Hayward is always looking for ways to make pool and spa ownership as simple and effortless as possible. The latest example of this is the new Universal H-Series pool and spa heater. Combining advanced technology with universal-fit flexibility, it's a smart choice for virtually any new installation or existing system upgrade delivering state of- the …, 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., Jul 17, 2022 · 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. , When I rotate the exchanger, the pressure switch fitting is on the opposite side away from the controls and the switch cannot be reconnected. I see 2 ways to correct this: 1. Flip the exchange over so the fitting will end up on the correct side or 2. remove the rear header and turn it over. Nowhere in the instructions does it mention removing ..., While all Hayward H-Series heaters are energy-efficient, the Universal H-Series 300 Low NOx heater has an 83-84 percent industry-leading thermal efficiency. ... Hayward Universal H Series Low NOx 300,000 BTU Natural Gas Swimming Pool Heater SKU: H300FDN. 5.0 See Reviews (3) $3,259.00 $4,187.99 You save 22%. Found a better price? Special Deal ..., 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 Step 2 Press the 'MENU ICON' button to place the heater in 'STANDBY' mode. Step 3 Press and hold the minus & plus buttons for 3 seconds. , Pool guy here says Hayward conversion kit (natural gas to propane) not letting gas through. He says internal switch not working. ... HI, I have a Hayward Pool Heater Lo Hox (I think the name) it is about 40,000 BTU natural gas 240 Volt. Blower moter in side. It has ran great for the past 6 or so years., For hayward pool heater if code repair, check the pressure switch and ensure proper pressure is being reached. Hayward pool heaters display an "if" code when the pressure switch is not closed. This is caused by insufficient water flow, closed valves, air in the system, or a clogged filter. It is important to identify and fix the issue ...