Bo on hayward pool heater

The Hayward pool heat pump is a self-contained unit designed specifically for pool heating. Each component has been selected with care to achieve a high-quality product in an effort to exceed all industry standards. All Hayward pool heat pumps have an electronic board with service analyzer, a titanium heat exchanger tube warranted for 10 years ...

Bo on hayward pool heater. POOL AND SPA/HOT TUB HEATERS H150FD, H200FD, H250FD, H300FD, H350FD, H400FD & H500FD MODELS SERVICE & INSTALLATION MANUAL FOR YOUR SAFETY This product must be installed and serviced by authorized personnel, qualified in pool/ spa heater installation. Improper installation and/or operation can create carbon monoxide gas

The Hayward HeatPro 140K Electric Heat Pump is a high-efficiency heater, gives you the ideal water temperature while using 80% less energy than natural gas heaters. It offers an alternative way to heat your pool that is safe, reliable, and energy efficient. Hayward HeatPro Electric Heater takes the heat from the surrounding air and uses it to ...

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.Universal HC Series - Dual Fuel 400k BTU. Hayward. SKU: HDF400. The industry’s smallest footprint heater allows replacement of almost any heater in an existing pad with the efficient reliability of the new Universal HC Series dual-fuel technology heater from Hayward®. Add to Compare. Add to Export. Overview.heater in STANDY . Press and hold the minus button and MENU I ON button for 3 seconds. bo should appear on the display when the heater has successfully entered bypass mode. Once in bypass, press the MENU I ON button until POOL or SPA is illuminated. Step 2 Step 3 Step 4 Step 1Companies in the Consumer Goods sector have received a lot of coverage today as analysts weigh in on Dollar Tree (DLTR – Research Report), Tar... Companies in the Consumer Goods ...This is, in my experience at least, simply a function of cost. When you zone in a bypass for a pool heater you will need to have a few valves. Two at minimum and three for optimal flow control if you are using in-and-out style valves like these Jandy diverter valves. If you wanted you could create a zoned bypass with as little as one three way ...Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. Gain insight. ... Phase Heaters: 1.0000: Pool Type: In Ground: Product Dimensions: 24 " x 19 " x 29.5 "Product Height: 24 in: Product Length: 29.5 in: Product Weight: 135 lb: Product Width: 19 in:POOL AND SPA / HOT TUB HEATERS. H135ID heater pdf manual download. ... Hold down both keys for 3 seconds until the indication ‘‘bO’’ is removed from the display. ... CA Clemmons, NC Nashville, TN Tel: 908-355-7995... Page 43: Warranty HAYWARD POOL HEATER CERTIFICATE OF LIMITED WARRANTY LIMITED HEATER WARRANTY: …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 should no longer be on the display. How To Put Hayward Heater In bO Mode? Here’s how you get your heater in Bypass Operation (bo) mode.

Tel: 908.351.5400 www.haywardpool.com. Models HP6003T, HP11003T, HP2100TCO3T, HP21003T, HP21203T. OWNERS OPERATION & PARTS MANUAL. Basic safety precautions should always be followed, including the following: Failure to follow instructions can cause severe injury and/or death. This is the safety-alert symbol.was getting CE code, aka Communication Error. Replaced main board, display board, and display panel.May 11, 2022 · Step 4: Disconnect Blower connector from the Control Module.Set the heater to the Pool or Spa setting. To generate a call for heat, lower the set point temperature. Step 5: Measure 120VAC along pins 1 and 2 during the pre-purge period. Beijing has offered little information about the investigation of several executives from China’s top oil producer, except to accuse them of “severe breaches of discipline,” a phra...HeatPro Series Heat Pump. Hayward. SKU: HP21405T. Our new HeatPro Series of Heat Pumps utilize industry-first microchannel technology to get your pool water to the perfect temperature. Add to Compare. Add to Export. Overview. Specifications.This is usually in your home's main electrical panel. Flip the breaker for your pool heater to the "Off" position, wait a few seconds, then flip it back to the "On" position. Finally, power your heater back on using the power switch. After a successful reset, your heater should be functioning correctly.A Bo Derek is a so-called perfect investment. The term comes from the 1979 movie "10," starring the actress Bo Derek, who depicted "the perfect woman." A &aposBo Derek&apos is a so...POOL AND SPA/HOT TUB HEATERS H150FD, H200FD, H250FD, H300FD, H350FD, H400FD & H500FD MODELS SERVICE & INSTALLATION MANUAL FOR YOUR SAFETY This product must be installed and serviced by authorized personnel, qualified in pool/ spa heater installation. Improper installation and/or operation can create carbon monoxide gas

According to the pool tech, the heater shouldn't have been functioning without being in 'bo' mode, but I don't buy that. This heater has a 2 wire control by the way. Willing to pay whoever can get me a final resolution to this problem.POOL AND SPA / HOT TUB HEATERS. H135ID heater pdf manual download. ... Hold down both keys for 3 seconds until the indication ‘‘bO’’ is removed from the display. ... CA Clemmons, NC Nashville, TN Tel: 908-355-7995... Page 43: Warranty HAYWARD POOL HEATER CERTIFICATE OF LIMITED WARRANTY LIMITED HEATER WARRANTY: …Feb 28, 2023 · Make sure that the heater is in POOL or SPA mode. Press the MODE button on the user panel keypads to set the heater on STANDBY mode. On STANDBY mode, the heater will not heat the water. Press and hold the MODE and DOWN buttons for at least three seconds. The panel should display BO, which means bypass operation. Turn off the pool heater using the power switch or breaker. Wait for at least 30 seconds to ensure the heater completely powers down. Turn the power back on and observe the display board. If the display board is functioning properly, it should show the default screen or a startup message.Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. Gain insight. ... Phase Heaters: 1.0000: Pool Type: In Ground: Product Dimensions: 24 " x 19 " x 29.5 "Product Height: 24 in: Product Length: 29.5 in: Product Weight: 135 lb: Product Width: 19 in:Sep 24, 2022 · Here is the Hayward Pool Heater Manual. Don’t Miss: How Do I Reduce The Ph In My Pool. How To Put Hayward Heater In Bo Mode. Heres how you get your heater in Bypass Operation mode. 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.

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The Universal H-Series 150,000 BTU Propane Gas Pool & Spa Heater from Hayward provides reliable, long-lasting comfort for pools and spas with a surface area of up to 400 ft. Built with a durable cupro nickel heat exchanger, it offers exceptional protection against corrosion and premature failure caused by unbalanced water chemistry, ensuring ...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.Apr 16, 2010 · 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 ... Set the water pressure switch to the desired setting. If the Hayward pool heater LO code persists, the water pressure switch must be replaced. 3. Vent Pressure Switch Fault. The vent pressure switch fault is another cause of the Hayward heater LO code occurring.How to connect to Wi-Fi network. To connect to a 2.4 GHz Band Wi-Fi network, perform the following at the Omni controller: 1. Use the right arrow to find the “config” icon, then press it. 2. Press “network”. 3. Press “setup wifi”. 4.

For an event whose outcome is all but assured, the Bo Xilai trial—scheduled to begin in Jinan on Thursday—arrives with an unusual amount of fanfare. Bo is accused of bribery and ab...May 29, 2018 ... The LO code on a Hayward heater means Limit Open, where one of the limit switches is not closing to complete the circuit.Answering a viewers request on how to add and program a newly installed heater to a Hayward OmniLogic Automation system.a short video showing how to light the pilot in the pool heater.turn gas on (blue nob)open door with screwdriver.put mirror down so you can see where flame g...Hayward H200 pool heater: Removal of the old thermostat and replacement with new, working thermostat.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.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.Shopping for Hayward ASME Universal H-Series Pool Heater, 250,000 BTU, Natural Gas? Doheny's has it in stock now at the guaranteed lowest price. ... Note: Hayward ASME heater ships by truck. Please allow 5-7 business days for delivery. Compare with Similar Products . Current Product. Out of stock. Hayward H250FDNASME ASME Universal H …

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.

Dive in with a dealer near you. Our network of certified personnel can help you build your pool, recommend a product, repair a faulty product, and test your water. Find a …Contractor's Assistant: Who manufactured the pool? Need to remove Bo code from Hayward heater. Contractor's Assistant: Do you plan on doing the work yourself? Yes. Contractor's Assistant: Is there anything else the Pool Technician should know before I connect you? Rest assured that they'll be able to help you. Just help …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...Universal H Series Heaters® How To: Hayward H400FDN | Universal H Series Troubleshooting Guide - Page 13 and hold the minus button and 'MENU ICON' button for 3 seconds. Step 4 'bo' should appear on the display when the heater has successfully entered bypass mode. Once in bypass, press the 'MENU ICON ' button until 'POOL' or …FibroPool Swimming Pool Heat Pump - FH255 55,000 BTU - for Above and In Ground Pools and Spas - High Efficiency, All Electric Heater - No Natural Gas or Propane Needed 4.3 out of 5 stars 58 1 offer from $2,199.99May 22, 2023 · 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. Jul 21, 2013 47,820 Northern NJ Pool Size 35000 Surface Plaster Chlorine Salt Water Generator SWG Type Pentair Intellichlor IC-60A 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...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 and spas. Its hydraulic performance also saves energy by reducing the circulation time of the pump. It can raise the temperature of an 800 gallon pool 30 degrees in less ...Advertisement Most human beings much prefer a warm meal to a cold one, especially if they're in cold or wet conditions. Eating cold spaghetti or cold beef stew is definitely no fun...

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Some of the most reviewed products in HAYWARD Pool Heaters are the HAYWARD Universal H-Series Propane Gas 150,000 BTU Low NOx Pool Heater with 5 reviews, and the HAYWARD Universal H-Series Natural Gas 400,000 BTU Low NOx Pool Heater with 4 reviews. Related Searches. hayward pool heater.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...To take a closer look or see other Hayward products please go to: www.hayward.com or call 1-800-432-8387 ... for ‘bo’ to appear. Heater must be in Spa or Pool Mode for bypass operation to work Temperature Lockout ... POOL SERVICE HEAT TEMP SET Max Pool Temp Limit is Pre-set To Energy-saving 90 F, See Owner’s Manual. 104 (default) ˜ashing ...Hayward has an advanced lineup of gas heat and electric heat and heat+chill solutions to deliver the ultimate control of your water temperature. Learn More. Download Assets. 56 …Encountering a ‘Bo Code’ on your Hayward pool heater can be frustrating, but with the right approach, you’ll get your heater back up and running smoothly. Here’s …Appliance Helpers. 6.99K subscribers. Subscribed. 25. 8.9K views 1 year ago. If you're looking for help fixing your Hayward Pool Heaters, look no further! Our …How to connect to Wi-Fi network. To connect to a 2.4 GHz Band Wi-Fi network, perform the following at the Omni controller: 1. Use the right arrow to find the “config” icon, then press it. 2. Press “network”. 3. Press “setup wifi”. 4.1. 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 …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 […]Hayward®'s HeatPro® Heat Pump, a high-efficiency heater, gives you the ideal water temperature while using less energy than natural gas heaters. It offers an alternative way to heat your pool that is safe, reliable, and energy efficient. To heat your pool water efficiently, the HeatPro takes the heat from the surrounding air and uses it to ... ….

Pomona, CA Clemmons, NC Nashville, TN Tel: 908-351-5400 www.haywardpool.com USE ONLY HAYWARD GENUINE REPLACEMENT PARTS 51 INTERNAL WIRING: If the heater display is blank after the electrical has been installed see …Change/Replace Combustion Chamber Disconnect gas & water unions Remove screw from Display Step 1 Step 2 Turn Power and gas off to unit, disconnect the gas Using a 5/16 nut driver or #2 Phillips Head line and plumbing unions from the heater. screwdriver, remove screw from below display.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.Hayward 400K BTU Pool Heater Review. November 14, 2023 by sunny. Step into a world of poolside luxury and endless relaxation with the Hayward Universal H-Series 400,000 BTU Natural Gas Pool & …Press the three buttons three times then set to pool OnUniversal HC Series - Dual Fuel 400k BTU. Hayward. SKU: HDF400. The industry’s smallest footprint heater allows replacement of almost any heater in an existing pad with the efficient reliability of the new Universal HC Series dual-fuel technology heater from Hayward®. Add to Compare. Add to Export. Overview.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. Table of Contents How the Heat Pump Works & Specifications Pg. 4-5 Replacement Parts & 4.8k ohm Chart Pg. 6-7 Display Functions and Descriptions Pg. 8 How To: Pg. 9-15 Toggle ON/OFF and Mode & Lock/Unlock Heat Pump 10-11 Set Pool Temperature & Set Clock 12-14 Set Timer ON/OFF &... Page 4: How The Heat Pump Works & Specifications An artificial intelligence chip would tell you just how pungent the smell is, on a scale from 1 to 5. Ever get home from a long day in the office and realize, a little too late, th...We have 4 Hayward H400FDN manuals available for free PDF download: Troubleshooting Manual, Service & Installation Manual, Owner's Manual Hayward H400FDN Service & Installation Manual (64 pages) POOL AND SPA/HOT TUB HEATERS Bo on hayward pool heater, An artificial intelligence chip would tell you just how pungent the smell is, on a scale from 1 to 5. Ever get home from a long day in the office and realize, a little too late, th..., Pomona, CA Clemmons, NC Nashville, TN Tel: 908-351-5400 www.haywardpool.com USE ONLY HAYWARD GENUINE REPLACEMENT PARTS 51 INTERNAL WIRING: If the heater display is blank after the electrical has been installed see …, Summary of Contents for Hayward H300FD. Page 1 POOL AND SPA/HOT TUB HEATERS H150FD, H200FD, H250FD, H300FD, H350FD, H400FD & H500FD MODELS OWNER’S MANUAL FOR YOUR SAFETY WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, PRINTED 10/24/2011 AT 1:13 PM injury, or death. , 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., 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., A pool heater sizing chart is a useful tool that can help streamline the process. By cross-referencing the pool’s surface area with the average temperature increase desired, a sizing chart can provide a quick reference for the minimum BTU output needed. This eliminates much of the guesswork involved in heater selection and …, Press the ‘MENU ICON’ button to place the heater in ‘STANDBY’. ‘bo’ should appear on the display when the heater has successfully entered bypass mode. Press and hold the …, 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., Checking And Cleaning The Water Flow Path: Verify water level: Ensure that the pool water level is at the appropriate mark. Low water levels can cause the heater to overheat and trigger the h5 code. Inspect the skimmer and pump basket: Remove any debris that has accumulated in the skimmer or pump basket., 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., By following these guidelines, you can quickly get your pool heater back up and running efficiently. Hayward Pool Heater Parts Diagram Hayward Pool Heater BO Code What Does BO Code Mean? The Hayward Pool Heater BO code indicates a flame-sensing fault. It means that the heater is unable to detect the flame properly., (1.5 m) of inside walls of swimming pool, spa, or hot tub. ... heat pump from hot water flow of heating devices such as gas ... In bypass operation “bo” mode, the ..., Table of Contents How the Heat Pump Works & Specifications Pg. 4-5 Replacement Parts & 4.8k ohm Chart Pg. 6-7 Display Functions and Descriptions Pg. 8 How To: Pg. 9-15 Toggle ON/OFF and Mode & Lock/Unlock Heat Pump 10-11 Set Pool Temperature & Set Clock 12-14 Set Timer ON/OFF &... Page 4: How The Heat Pump Works & Specifications , Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. Gain insight. ... 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: 25 in:, 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..., Are you experiencing a LO code on your Hayward H-Series pool heater? If so, give this video a watch for a few basic tips on how to work through the issue you... , 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 […], (1.5 m) of inside walls of swimming pool, spa, or hot tub. ... Consideration has gone into the design of Hayward's HDF series pool heater ... bo” disappears from ..., 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., HeatPro Variable-Speed Heat-Cool Pump 120k BTU. Heating swimming pools is a wise investment as it increases its value and extends the swimming season. So to graduate to a higher degree of comfort and control, choose a Hayward heating solution., This unit is perfect for the environmentally conscious Pool and Spa owner thanks to its Low NOx capabilities. The Hayward Universal H-Series gas heater meets or exceeds the South Coast Air Quality Management District's (SCAQMD) Low NOx emission standards, making it ideal for use in states with strict air quality guidelines such as California., Here is the Hayward Pool Heater Manual. Don’t Miss: How Do I Reduce The Ph In My Pool. How To Put Hayward Heater In Bo Mode. Heres how you get your heater in Bypass Operation mode. 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., Answering a viewers request on how to add and program a newly installed heater to a Hayward OmniLogic Automation system., Tel: 908.351.5400 www.haywardpool.com. Models HP6003T, HP11003T, HP2100TCO3T, HP21003T, HP21203T. OWNERS OPERATION & PARTS MANUAL. Basic safety precautions should always be followed, including the following: Failure to follow instructions can cause severe injury and/or death. This is the safety-alert symbol., The Hayward Heat Pro HP21124T pool heat pump has 110,000 BTUs, making it suitable for midsize pools. Ranks high as an energy-efficient and durable unit. Compatible with Hayward Intermatic, Compool, AquaLink, Goldline, and AquaSwitch control systems. The temperature display is continuous and easy to use allowing you to change your temperature by ..., Page 40 Heat Pump Pool / Spa Heater Owner’s Manual Notes:... Page 41 Notes:... Page 42 1. Fill out the reverse side of this card. 2. Cut card along the edges and drop it in the mail to us. ALONG EDGES Hayward Pool Products 1 Hayward Industrial Drive Clemmons, NC 27012 ATTN: HEAT PUMP WARRANTY DEPT., Hayward H400IDL pool heater rust on burn tubes, corrosion on heat exchanger. Thread starter cowgs; Start date Apr 9, 2021; Jump to latest Follow Reply Forums. Equipment - Build, Use, and Repair. Everything Else . C. cowgs 0. Sep 5, 2009 2. Apr 9, 2021; Add bookmark #1 Hello I just took apart my 16 year old Hayward natural …, This unit is perfect for the environmentally conscious Pool and Spa owner thanks to its Low NOx capabilities. The Hayward Universal H-Series gas heater meets or exceeds the South Coast Air Quality Management District's (SCAQMD) Low NOx emission standards, making it ideal for use in states with strict air quality guidelines such as California., May 11, 2022 · Step 4: Disconnect Blower connector from the Control Module.Set the heater to the Pool or Spa setting. To generate a call for heat, lower the set point temperature. Step 5: Measure 120VAC along pins 1 and 2 during the pre-purge period. , Shopping for Hayward ASME Universal H-Series Pool Heater, 250,000 BTU, Natural Gas? Doheny's has it in stock now at the guaranteed lowest price. ... Note: Hayward ASME heater ships by truck. Please allow 5-7 business days for delivery. Compare with Similar Products . Current Product. Out of stock. Hayward H250FDNASME ASME Universal H …, Encountering a ‘Bo Code’ on your Hayward pool heater can be frustrating, but with the right approach, you’ll get your heater back up and running smoothly. Here’s what you need to do: Reset Your Heater. To clear the ‘Bo Code’, the first step is a simple reset: Turn off the pool heater and disconnect it from the power source., Here’s how you get your heater in Bypass Operation(bo) mode. 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. … See more, To take a closer look or see other Hayward products please go to: www.hayward.com or call 1-800-432-8387 ... for ‘bo’ to appear. Heater must be in Spa or Pool Mode for bypass operation to work Temperature Lockout ... POOL SERVICE HEAT TEMP SET Max Pool Temp Limit is Pre-set To Energy-saving 90 F, See Owner’s Manual. 104 (default) ˜ashing ...