If hayward heater code

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.

If hayward heater code. In this section, we’ll delve into the hayward pool heater p5 code, its features, and how it works. So, let’s dive in! Features Of The Hayward Pool Heater P5 Code: Energy-efficient: The hayward pool heater p5 code is designed with energy efficiency in mind. It utilizes advanced technology to ensure optimal fuel consumption, resulting in ...

Diagnostic Codes For Hayward Heat Pump

For Canadian installations, the heater must be installed in accordance with standards CAN/CGA B149.1 and B149.2 - INSTALLATION CODES FOR GAS BURNING APPLIANCES AND EQUIPMENT and/or local codes, and if applicable, Standard CSA C22.1 - CANADIAN ELECTRICAL CODE, Part 1. Location of heater: Locate the heater in an area where a leaking heatTurn 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.Failure to heed the following may result in damage to equipment. Service by unauthorized personnel will void the heat pump warranty. AIR TEMP SENSOR OPEN or AIR TEMP SENSOR SHORT. CLOCK LOW BATTERY. DEFROST1 SENSOR OPEN or DEFROST2 SENSOR OPEN. DEFROST1 SENSOR SHORT or DEFROST2 SENSOR SHORT. ERROR AT PRIMARY UNIT. HIGH PRESSURE FAULT.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.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...I turned on my Hayward pool heater and it showed a CE code. The service light is on. I am able to press mode button and switch between standby, spa and pool. The heater goes on but cannot work temp. B … read moreHayward H250FDP pool heater showed SF code. Replaced the thermistor and restarted the power. Display still shows SF code and sevice light on. Cycled the mode button and the blower comes on, but no ign … read more

Hayward H250FDP pool heater showed SF code. Replaced the thermistor and restarted the power. Display still shows SF code and sevice light on. Cycled the mode button and the blower comes on, but no ign … read more A protective winter cover is also offered by your retailer. 22 OWNER’S MANUAL Hayward® Heat Pump Pool Heater Limited Warranty The Hayward heat pump pool heater is warranted by the manufacturer to be free of defects in materials and workmanship for a period of two (2) years for parts and (1) one year for labor. 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.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. Radius: miles. Pool Type: ... Heaters (not including Heat Pumps) Heat Pumps. Lighting. Pumps. Variable Speed Pumps ...Hayward Heater LO code. Thread starter joeg679; Start date Jul 19, 2023; Jump to latest Follow Reply Forums. Equipment - Build, Use, and Repair. Pumps, Filters, and Plumbing . 1; 2; Next. 1 of 2 Go to page. Go. Next Last. J. joeg679 Member. May 28, 2017 21 NJ. Jul 19, 2023; Add bookmark #1 Hello, I was getting a Lo code on my heater and ...1 How to Read Hayward Serial Numbers and Date Codes. 1.1 Pumps, Filters, Cleaners, Heaters, Heat Pumps, some Incandescent Lighting and Accessories; 1.2 Controls, Electronic Chlorination, ColorLogic Lighting; 1.3 Heat Pumps, Heaters, Filters, Pumps August 2015 - Present; 1.4 Heat Pumps, Heaters, Filters, Pumps March 2010 - July 2015

View online or download PDF (6 MB) Hayward H250FD, H350FD, H300FD, H150FD, H400FD, H200FD, Universal H-Series Low NOx User manual • H250FD, H350FD, H300FD, H150FD, H400FD, H200FD, Universal H-Series Low NOx above ground pool accessories PDF manual download and more Hayward online manuals.My hayward heater is showing a CE code. I've replaced the display and ignition boards and it's still showing a CE - Answered by a verified Pool and Spa Expert We use cookies to give you the best possible experience on our website.Stumbling upon a 'LO' code on your Hayward heater can be quite the head-scratcher. Don't worry, you're about to unravel the mystery behind this cryptic message. This code typically indicates a water temperature sensor error, but it can also be a sign of other underlying issues with your pool heater. In this article, you'll learn the steps to diagnose and fix the problem, ensuring your pool remainsCaring for Your Pool Heater. How to Protect Your Pool Heater. Initial Startup. Meaning of Display Codes. Display Meaning of Codes. ... 5 Meaning of Display Codes; 6 Display Meaning of Codes; ... Related Products for Hayward Heat Pump. Hayward HET50BTA; Hayward HET65BTA; Hayward HET110BTA; Hayward HET125BTA; Hayward HeatRelax;

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Hayward Insights provides expert advice, tips, and industry updates to help pool owners and enthusiasts with their swimming pool experience. Gain insight. Support. ... Rear Clearance - Heaters: 6 in: Refrigerant: No: Series Heaters: Universal HSeries: Shipping Dimensions: 30.6 " x 32.8 " x 39.6 "Shipping Height: 30.6 in: Shipping Length: 39.6 ...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.My Hayward h400 pool/spa heater will not turn on any longer. It is getting power but the combustion blower which turns on first is not turning on. There is no gas smell and no igniter spark happening. ... Hi I have a 2 year old Hayward h series heater showing a "bd" code what is wrong? ...Mar 24, 2023 · Blower vacuum switch; 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, h350fdp, h400fdn, h400fdp

My pool heater stopped working and the display showed IO which means the igniter is bad. It was replaced and still showed that code. Troubleshooting came to...Oct 18, 2020 ... was getting CE code, aka Communication Error. Replaced main board, display board, and display panel.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...Nov 16, 2023 · The SF code on your Hayward heater’s display stands for “Stack Flue Sensor Failure.”. This code indicates that there’s a problem with the sensor responsible for monitoring the flue gases in your heater. Flue gases are the byproducts of combustion, and monitoring them is crucial for safety reasons. Common Causes of SF Code. The Universal H-Series 400,000 BTU Propane Gas Pool & Spa Heater from Hayward provides reliable, long-lasting comfort for pools and spas with a surface area up to 1,200 ft. Built with a durable cupro nickel heat exchanger, it offers exceptional protection against corrosion and premature failure caused by unbalanced water chemistry, ensuring you ...Resetting your Hayward pool heater is a relatively simple process. Before you begin, you'll need to turn off the power to the heater. Once you have, follow these steps: 1) Locate the reset switch on the front or side of your heater. Depending on the type of heater, it could be a button, switch, dial, or lever.Medallion Energy 3055 Tech Park Way Deland, FL 32724 407-786-0000. Hours Mon-Fri: 8am – 7pm Saturday: 9am – 5pm Sunday: By AppointmentRuud hot water heaters can only be purchased through local independent contractors that have been authorized as a Ruud dealer as of 2015. Customers can search for local Ruud author...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 ...Jul 6, 2011. 4,177. FL. Jun 6, 2019. #4. rock909 said: @ps0303 Any assistance is appreciated the part arrives today planned on tackling this week. Turn off power to heater and also turn off your pump. Remove the top and bottom side …

The breakdown the H400FDN model code is as follows: (1) H identifies the heater as part of the Hayward H-Series pool heater range. (2) 400 defines the size of the heater in BTU and shows that the unit is rated at 400,000BTU. (3) FD identifies the unit as a Forced Draft Low NOx Heater. (4) N identifies the unit is designed for a Natural Gas fuel ...

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 ...Installing a non-compliant heater in these counties will void the manufacturer's warranty and could result in a fine from your local code enforcement. Item cannot be refunded/returned without approval and authorization from Home Depot; Rated in the top 20 of the best-selling pool heaters on the market; Shop our wide selection of Hayward Pool ...When it comes to hayward heaters, there are some common bd codes that you might encounter. Bd1 indicates ignition failure, which can often be resolved by cleaning the ignition assembly. Bd2 suggests water temperature sensor failure, which can occur due to a faulty sensor or connection issue. If you see bd3, it indicates high limit switch open ...Below is a list of all Diagnostic Codes for the UHS Heater. Diagnostic Code Description AC Blower Vacuum Switch closed AO Blower Vacuum Switch open BD Bad board or …The Universal H-Series 200,000 BTU Propane Gas Pool & Spa Heater from Hayward provides reliable, long-lasting comfort for pools and spas with a surface area of up to 600 ft. Built with a durable cupro nickel heat exchanger, it offers exceptional protection against corrosion and premature failure caused by unbalanced water chemistry, ensuring ...Pentair Intellichlor IC-60. May 21, 2022. #2. No power switch on the heater. You need to cycle the heater CB to power it down. CE code on the display indicate a display failure. Water gets in around the display and causes the keypad to be non-responsive. The fix is an expensive replacement of the display boards.Hayward - W3HP21004T HeatPro 90K BTU, 230V, Titanium, Digital, Electric Pool Heat Pump. $4,299.00. Delivery. FREE Standard Shipping On All Orders! Shop Now. Hayward pool heaters extend swimming seasons by raising the water temperature of your swimming pool. Gas pool heaters efficiently heat a pool to desired temperature.Hayward pool heaters are known for their durability and ease of use. They are designed with a cupro-nickel heat exchanger that resists corrosion and lasts longer than traditional copper exchangers. Hayward heaters also come with a digital control panel that allows you to adjust the temperature and settings easily.Hayward H250FDP pool heater showed SF code. Replaced the thermistor and restarted the power. Display still shows SF code and sevice light on. Cycled the mode button and the blower comes on, but no ign … read moreThe Universal H-Series 200,000 BTU Propane Gas Pool & Spa Heater from Hayward provides reliable, long-lasting comfort for pools and spas with a surface area of up to 600 ft. Built with a durable cupro nickel heat exchanger, it offers exceptional protection against corrosion and premature failure caused by unbalanced water chemistry, ensuring ...

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The heater attempts to light the burner three times before displaying the IF code and shutting down. The code protects the heater from damage caused by a gas buildup or other ignition-related problems. Common Causes of the Hayward Heater IF Code. There are several reasons your Hayward heater may be displaying the IF code.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.Heater Hayward ED2 Fault Code Thumbnails (18 pages) Heater Hayward C-SPA-XI 5.5 Installation And Operation Manual. Pool and spa/hot tub heaters (24 pages) Summary of Contents for Hayward H250FDN.Our hayward pool heater is showing code. E 03 01. E 03 01. heater is new , was just hooked up and appeared to be working fine at first then a couple days later code appeared. it will start up and run for a few minutes and then code appeared again. ...Hayward 400 bo code. texasstig. Mar 13, 2021. bo code hayward heater failure - remote not firing heater. Jump to latest Follow Reply. Forums. Equipment - Build, Use, and Repair. Everything Else. T. Universal H Series Heaters® Troubleshooting: Hayward H400FDN | Universal H Series Troubleshooting Guide - Page 19 Diagnostic Codes Below is a list of all Diagnostic Codes for the UHS Heater. Troubleshooting Steps for each Code are covered on the following pages. Diagnostic Code AC AO BD CE EE HF HS IF IO LO PF SB SF Best Answer: Turn off the power to the Hayward pool heater. Locate the CE code on the display panel. Press and hold the "Reset" button for three seconds. Press the "Up" or "Down" arrow keys to scroll through the menu options. Select the "Service" menu option. Enter the four-digit service code. Press the "Enter" button.Preventing Future LO Codes. To avoid encountering the Hayward Heater LO Code in the future, consider implementing these preventive measures: Regular Maintenance: Stay on top of regular maintenance tasks, such as cleaning or replacing your pool filter and inspecting your plumbing system for blockages. ….

Hayward pool heater if code. If your Hayward pool heater displays an IF or 1F code, it indicates an issue of “Ignition Failure” in your pool heater. Different problematic components trigger the code to appear on display. Well, showing code helps you to determine a specific issue and helps you to take steps to the relevant issue immediately.Hayward Pool Products 620 Division Street, Elizabeth NJ 07207 Phone (908)-355-7995 www.hayward.com ... heater, a valve actuator, pool and yard lighting, and more. The VS Omni offers the next generation of ... local codes require). The Hub is designed to mount vertically with the knockouts facingPREMIUM PERFORMANCE: The Hayward Universal H-Series 200,000 BTU Propane Heater delivers premium heating performance for years of reliable, long-lasting comfort. more Last update on 2023-07-10 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API2 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. 3.2 Refer To The Diagnostic Codes Manual.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. 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 ... Please enter a zip code within the 48 contiguous states. i. Please enter a valid zip code Your zip code will help us to provide you with the most up-to-date delivery information ... (Liquid Propane) gas can be hazardous by combustion or exhaust of the pool heater. Hayward pool equipment had created the Pool heater FAQ below to help the pool ...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... If hayward heater code, Yes on actual heater it is left on spa or pool does not matter which one because the control now comes from automation. Temperature at the actual heater should be set to max as well. Again because temperature setting will come from automation not heater. Ask Your Own Pool and Spa Question. Pool and Spa Expert: CertifiedPoolPro., When my Hayward heater started displaying the "AO" error code, I immediately felt a sense of panic. As a homeowner who relies on my heater to keep the pool, For Canadian installations, the heater must be installed in accordance with standards CAN/CGA B149.1 and B149.2 - INSTALLATION CODES FOR GAS BURNING APPLIANCES AND EQUIPMENT and/or local codes, and if applicable, Standard CSA C22.1 - CANADIAN ELECTRICAL CODE, Part 1. Location of heater: Locate the heater in an area where a leaking heat, Hayward H250FDP pool heater showed SF code. Replaced the thermistor and restarted the power. Display still shows SF code and sevice light on. Cycled the mode button and the blower comes on, but no ign … read more, 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's Universal H-Series 400,000 BTU natural gas pool and spa heaters provide reliable, long-lasting comfort for pools and spas with surface areas up to 1,200 feet. Manufactured with a durable copper-nickel heat exchanger that provides superior protection against corrosion and premature failure due to water chemistry imbalances, ensuring ..., The Hayward Municipal Code is updated on a regular basis. Review the Municipal Code here: Hayward Municipal Code. For additional information on the Hayward Municipal Code, please contact the Office of the City Clerk at 510.583.4400. Traffic Code & Regulations. Traffic codes are regulations governing parking and traffic movement., 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 Round Heat-Cool Pump 100k BTU. Hayward. SKU: HP31005T. High performance, energy-efficient HeatPro heat pumps quietly and economically maintain the ideal water temperature at all times. Add to Compare. Add to Export. Overview. Specifications., Meaning of Display Codes 17 Troubleshooting 18 Requesting Assistance or Service 20 Maintenance 21 Winterizing 21 Hayward® Heat Pump Pool Heater Limited Warranty 22 International Warranty 23 Notes 24 Warranty Card Registration 25 Table of contents OWNER'S MANUAL. 2 Thank you for buying, Please enter a zip code within the 48 contiguous states. i. Please enter a valid zip code Your zip code will help us to provide you with the most up-to-date delivery information RALEIGH, NC #466 Buy Online Pickup In-Store Available! Curbside Available. Leslie's Pool Supplies ... Hayward Pool Heaters. Home Equipment Pool Heaters & Heat Pumps ..., 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., See more reviews for this business. Top 10 Best Heater Repair in Hayward, CA - April 2024 - Yelp - Artisan Air Heating and Cooling, Jazz Heating, Air Conditioning & Plumbing, AJ Heating & Cooling, Bay Area Climate Control, Air Flow Pros Heating And Air Conditioning, JR Heating & Cooling Systems, AIS Heating & Air Conditioning, JJ Heating and ..., Pentair Intellichlor IC-60. May 21, 2022. #2. No power switch on the heater. You need to cycle the heater CB to power it down. CE code on the display indicate a display failure. Water gets in around the display and causes the keypad to be non-responsive. The fix is an expensive replacement of the display boards., Aug 6, 2021 ... ... If you are international - please add a ... How to Run a Successful Heat Pump Service Call With Multiple Failures - Hayward Pool Heater Repair., Raypak 014786-156A Propane Gas Pool Heater 150K BTU for 0-1999ft Elevation. Part Number: 014786. Model Number: P-R156A-EP-C. Click For Best Price. Raypak 266,000 BTU Digital Electronic Ignition Natural Gas Pool Heater. Built to withstand various weather conditions, perfect solution for environments requiring efficiency, convenience and versatility., The Hayward Pool Heater SF Code is a safety feature that prevents the pool heater from over-heating. The code stands for "Safety Fault" and is displayed when the temperature in the heater exceeds 110 degrees Fahrenheit (43°C). It will shut off power to the pool heater until it can cool down to a safe temperature., How to Repair The Hayward H Series Heater by replacing the Heat Exchanger and Control Panel DIY. The Hayward H series pool heaters have a similar repair orde..., View online or download Hayward H400FDN Owner's Manual, Troubleshooting Manual ... Brands; Hayward Manuals; Heater; H400FDN; Hayward H400FDN Manuals. Manuals and User Guides for Hayward H400FDN. We have 4 Hayward H400FDN manuals available for free PDF download: Troubleshooting ... Diagnostic Codes and Part Numbers. 19. Troubleshooting Guide. 20 ..., Good afternoon; how are you this afternoon? I am sorry to hear about your BD code on your Hayward Heater. I am sure this is frustrating. We will start from the beginning; some of this may be repetitive. BD Code means Bad Board or Secondary High Voltage Fault. Remove FC4 fuse and measure continuity. Let me know if that fuse is the one you ..., 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) Step 4: Temperature Limit Switch Wiring Inspection. Step 5: Continuity Test for Temperature Limit Switches., 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., My pool heat pump trips the circuit when the compressor starts up., Common Causes of the H5 Code. When your pool heater displays the H5 code, it typically occurs due to a few common reasons. Troubleshooting h5 code in other pool equipment can help identify the issue. Common misconceptions about h5 code in Hayward pool heaters include thinking it is solely related to a faulty igniter or gas valve., 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 …, 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., Re: H400 natural gas heater that was throwing the IF code I just encountered the same problem with my hayward H350 pool heater. I cleaned the office with a bamboo skewer, and removed some of the web. I decided to go a step further and removed the gas valve/regulator then blew out each of the offices with some compressed …, Hayward 250 pool heater throwing AO code. Replaced control board, blower motor, pressure switch, igniter. Still not turning on. ..., For more on the CE and SF codes read Hayward H-Series Heaters - Further Reading . Reply. Report. B. BKOhioPool New member. Oct 3, 2023 2 Ohio. Oct 4, 2023; Add bookmark #3 Yes, I found that yesterday and removed it. It did not look corroded (maybe i'm wrong, pic attached) and the wiring looked fine. I order another one and will install it today ..., Heater will not power up Pages 14-22 Open FC1 and/or FC2 Fuse Pages 23-24 Open FC3 and/or F1 Fuse Pages 25-28 Open FC4 Fuse Pages 29-31 Diagnostic Codes Page 32 BD Code Pages 33-34 EE and CE Codes Page 35 IO and SB Codes Page 36 SF and HS Codes Page 37 HS and PF Codes Page 38 HF Code Page 39 LO Code Pages 40-43 , 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..., We have 1 Hayward H400IDL2 manual available for free PDF download: Installation, Operation & Service Instructions Hayward H400IDL2 Installation, Operation & Service Instructions (23 pages) Pool and Spa/Hot Tub Heaters, I have a Hayward HP21104T heat pump that seemed to stop heating late last season. ... Since it is running but not heating I assume low refrigerant but the manual indicates that there is a code thrown for low coolant. Don't know if I should call an electrician or an HVAC person. ... That could be the issue as not all the water is reaching the ...