Lo hayward heater - 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 # …

 
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Hover Image to Zoom. $ 3999 00. $334.00 /mo† suggested payments with 12 months† financing Apply Now. 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.Our network of certified personnel can help you build your pool, recommend a product, repair a faulty product, and test your water. Find a professional near you. Hayward offers environmentally responsible, cutting-edge pool and spa equipment for residential and commercial, in-ground and above-ground pools.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 efficiency1. 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?Power cycle heater Call for heat and test gas valve Step 10A... Page 44: Lo: Code 11. Service LED ON: “LO” Code “LO” Code (Limit Open) 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.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 yourself... 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. 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.Shopping for Hayward Universal H-Series H500 Low Nox Pool Heater, 500,000 BTU, Propane Gas? Doheny's has it in stock now at the guaranteed lowest price. Enjoy FREE Expedited Shipping.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.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. Replace defective switches.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?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. Replace defective switches.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 ...Jan 11, 2022 · Step 3: If yes, disconnect the p4 plug from the connection and take the voltage reading of pins 4 and 6. Here you will also get reading for 110-125 VAC. 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. Be the first to know. Email [email protected] to get notified. Enter the values in the highlighted cells paying attention to the units, For a 5mph wind, add 25%. For a 10 mph, double the kW required.Hayward Universal H-Series heaters have the flexibility to provide an energy-efficient and environmentally responsible low NOx performance solution for pools and spas. They also feature a cupronickel heat exchanger with Totally Managed Flow to provide outstanding corrosion and erosion protection that goes perfectly with today's popular salt ...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. Lo code new Hayward Heater. CCBRENNER; Jun 28, 2023; Everything Else; Replies 4 Views 183. Everything Else Jun 28, 2023. CCBRENNER. C. B. Constant issues with Hayward ...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.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...Hayward pool heater troubleshooting involves checking for low gas pressure, inadequate air supply, improper venting, a dirty filter, or closed valves that may cause the heater to …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 ... Universal H-Series Natural Gas …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 ...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.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.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.It is perfectly normal operation to show the FLO code even while the heater is in the OFF position because the control panel and display are still operational. From the manual: All AquaCal heaters represented within this manual are designed to operate successfully at flow rates of 30-to-70 gallons-per-minute (GPM).Step 2: Remove the front panel of the heater to access the burners. Take a close look at the burners and check for any signs of damage or corrosion. Step 3: Use a soft-bristled brush or a vacuum cleaner to remove any dirt, debris, or insects from the burners. Pay extra attention to the small holes on the burner tubes.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.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, 400,000 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 & PowerLo code new Hayward Heater. CCBRENNER; Jun 28, 2023; Everything Else; Replies 4 Views 183. Everything Else Jun 28, 2023. CCBRENNER. C. B. Constant issues with Hayward H250FDN Heater for 2500 gallon Spa...now LO code. bobby2175; Jun 11, 2023; Everything Else; Replies 7 Views 219. Everything Else Jun 11, 2023. …Replacing an old water heater can help ensure that you always have enough hot water in your home, and it might also save you money on your income taxes. The Internal Revenue Servic...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... 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 …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 …Lo code new Hayward Heater. CCBRENNER; Jun 28, 2023; Everything Else; Replies 4 Views 183. Everything Else Jun 28, 2023. CCBRENNER. C. B. Constant issues with Hayward H250FDN Heater for 2500 gallon Spa...now LO code. bobby2175; Jun 11, 2023; Everything Else; Replies 7 Views 219. Everything Else Jun 11, 2023. …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 …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), ifHayward Universal H-Series Low NOx Induced Draft Pool & Spa Heater | 400,000 BTU | Natural Gas | W3H400FDN. 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 ...NOTE: If during step four, the heater ; Hayward H250FDP | Universal H Series Troubleshooting Guide - Page 8 Sequence of Operation: Failure to Light If trial fails: 1. Gas valve de-energizes (for 30 second, blower post purge). 2. Starts over at #2 of heating mode sequence. ... Diagnostic Code AC AO BD CE EE HF HS IF IO LO PF SB SF Hayward ... View and Download Hayward H150FDN troubleshooting manual online. universal h series heaters. H150FDN heater pdf manual download. Also for: H150fdp, H150fdpasme ... 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.Clean the hayward heater regularly to prevent any debris buildup, which can trigger the if code. Remove leaves, sticks, and other objects from the heater. Check the air filter and clean or replace it as needed. A dirty filter restricts airflow and can cause the heater to overheat, resulting in the if code.Pool Heaters - Hayward Pool Products | Hayward Pool Products. Home. Products. Heaters. Hayward has an advanced lineup of gas heat and electric heat and heat+chill …Jan 11, 2022 · Step 3: If yes, disconnect the p4 plug from the connection and take the voltage reading of pins 4 and 6. Here you will also get reading for 110-125 VAC. 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. 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...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.Remove front & rear panels Remove wires from limit switches. Step 13. Remove the 4 screws from the bottom of the front and rear panels and pull up and out to remove each one. Step 14. Use needle nose pliers to remove the 2 red wires from each of the high limit switches. Remove wires from water pressure switch.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 ...Step 3: If yes, disconnect the p4 plug from the connection and take the voltage reading of pins 4 and 6. Here you will also get reading for 110-125 VAC. 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.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.Professional Service: If you’ve tried the above steps and the LO code persists, it’s advisable to contact a professional pool heater technician. They can diagnose the issue more accurately and perform any necessary repairs. Preventing Future LO Codes. To avoid encountering the Hayward Heater LO Code in the future, consider implementing ...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 1: Inspecting the Water Pressure Switch Wiring; Step 2: Testing Water Pressure Switch Continuity; Step 3: Pressure Switch Adjustment (If Required) Set both the pool and spa desired temperature on the heat pump before turning on the remote. Once the remote is calling for pool or spa you will not be able to change the function on the heat pump without turning the remote off. Use Terminals 1 and 2 for 2 wire remote connection. Use Terminals 3,4,& 5. 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.* 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 SpecificationsStep 3: If yes, disconnect the p4 plug from the connection and take the voltage reading of pins 4 and 6. Here you will also get reading for 110-125 VAC. 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. Otherwise, move forward to check the transformer. Step 5: …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. Replace defective switches.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. 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. 3 Oct 2017 ... 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 ...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 Universal H-Series Low NOx Induced Draft Pool & Spa Heater | 400,000 BTU | Natural Gas | W3H400FDN. 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 ...Hayward Universal H-Series heaters have the flexibility to provide an energy-efficient and environmentally responsible low NOx performance solution for pools and spas. They also feature a cupronickel heat exchanger with Totally Managed Flow to provide outstanding corrosion and erosion protection that goes perfectly with today's popular salt ...Dec 6, 2020 · Answering a viewers request on how to add and program a newly installed heater to a Hayward OmniLogic Automation system. 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. Get the scoop on the 7 best parks in Los Angeles, plus recommendations on the best trails in each and what attractions and where to stay nearby. Southern California is home to grea...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.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. The LO error code means that the limit string is open. The reason why the limit string opens is a low water flow rate. So, basically, the LO code means that your heater doesn’t have sufficient water flow. When this occurs you may mistake it as your Hayward pool heater not turning on. But actually, the heater … See moreI think you have your answer right there. If there isn't enough flow through the heater and it runs, the water will boil and can melt pipes. The flow requirement for a salt cell is much lower (pretty much "is water passing through). You'll just have to run your pump at a higher speed to run the heater.View and Download Hayward H150FDN troubleshooting manual online. universal h series heaters. H150FDN heater pdf manual download. Also for: H150fdp, H150fdpasme ...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. 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.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 …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, …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.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 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, 400,000 BTU, Natural Gas, Pool and Spa Heater delivers energy efficient heating to your pool's water that you can trust. Hayward Universal H-Series - Versatility & PowerLearn 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...The LO error code means that the limit string is open. The reason why the limit string opens is a low water flow rate. So, basically, the LO code means that your heater doesn’t have sufficient water flow. When this occurs you may mistake it as your Hayward pool heater not turning on. But actually, the heater … See moreFirst, 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.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), ifUniversal 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.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.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... 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...Remove front & rear panels Remove wires from limit switches. Step 13. Remove the 4 screws from the bottom of the front and rear panels and pull up and out to remove each one. Step 14. Use needle nose pliers to remove the 2 red wires from each of the high limit switches. Remove wires from water pressure switch.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. Replace defective switches.A pool heater is an essential component of any swimming pool, especially in areas where the weather can get chilly. If you own a Hayward pool heater and it breaks down, you need to...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.

Jun 20, 2022 · My pool heater quit working. It would try to start, but then fail. The error code "IF" was displayed. It was an "Ignition Failure Lockout". I looked at a... . Jennifer paeyeneers brother all american rejects

lo hayward heater

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.They are built to control the amount of emissions released from the heater. Lo-Nox heaters also complies with California Air Quality Emissions Standards and qualify for state rebates as well. ... I am looking to replace our heater. We had a Hayward (either 150 BTU or 200 BTU) heater that heated our 18 foot round above ground pool really well ...Hi Mark, hard to say if it does not display any error code, the caution symbol on a Hayward Heater is usually accompanied by an error code, LO being the most …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 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 ... Universal H-Series Natural Gas …Learn How Solar Pool Heaters Work; Learn About Hayward. At Hayward, we're more than just equipment. Learn more. Hayward Insights. Hayward Insights. Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. Gain insight. Support.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 ...The flagship of our H-Series line, they combine industry-leading hydraulics, exceptional performance, energy efficiency, and reliability, with planet-friendly low-NOx emissions. Flexible connection options make them ideal for new or existing applications. Choose from 6 250,000, 400,000 and 500,000 BTU natural gas or propane models.I have a Hayward 300k BTU heater. It's light comes on and shows low. When water pressure increases the "Lo" sign goes away but I can't get the mode to switch to pool. 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 LO - PF - Sb - SF - ‘bo’ (bypass operation -2 wire ONLY) Press to place the heater in MODE MODE & STANDBY SPA POOL SERVICE HEAT TEMP SET MODE Max Pool Temp Limit is Pre-set To Energy-saving 90 F, See Owner’s Manual. ‘STANDBY’ Mode. for 3 seconds for ‘bo’ to appear. Heater must be in Spa or Pool Mode for bypass operation to workClean the hayward heater regularly to prevent any debris buildup, which can trigger the if code. Remove leaves, sticks, and other objects from the heater. Check the air filter and clean or replace it as needed. A dirty filter restricts airflow and can cause the heater to overheat, resulting in the if code.My Hayward spa heater (installed 2018) is not heating the water and is displaying this LO code. I have read every troubleshooting guide and watched every video I could find. My diagnostics included: 1. Cleaned the filters, even ran the pump without the filters - still LO 2. Checked wires at pressure switch for continuity - still LO 3.Pool Heaters - Hayward Pool Products | Hayward Pool Products. Home. Products. Heaters. Hayward has an advanced lineup of gas heat and electric heat and heat+chill ….

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