--- title: Troubleshooting Hot Tub Or Swim Spa Not Heating Up description: Troubleshoot a hot tub or swim spa not heating with our step-by-step guide. Check settings, water flow, and breakers before calling a technician. image: https://blog.hydropoolnorthwest.co.uk/hubfs/Troubleshoot-Hot-Tub-Or-Swim-Spa-Not-Heating.jpg --- [hello@hydropoolnorthwest.co.uk](mailto:hello@hydropoolnorthwest.co.uk) [01612 926649](tel:01612%20926649) [![](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/instagram-bronze.svg)](https://www.instagram.com/hydropoolnorthwest/) [![](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/Facebook-bronze.svg)](https://www.facebook.com/hydropoolnorthwest) [![](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/youtube-bronze.svg)](https://www.youtube.com/HydropoolmanchesterUk) ## Hydropool North West [![](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/Hydropool_NW_Logo_Cream.png)](https://www.hydropoolnorthwest.co.uk/) ENQUIRE - About Us - Hydropool North West - [About Us](https://www.hydropoolnorthwest.co.uk/about-us) - [Meet The Team](https://www.hydropoolnorthwest.co.uk/meet-the-team) - [Our Projects](https://www.hydropoolnorthwest.co.uk/case-studies) - [Reviews](https://www.hydropoolnorthwest.co.uk/reviews) - Areas We Cover - [Cheshire](https://www.hydropoolnorthwest.co.uk/areas-we-cover/cheshire) - [Derbyshire](https://www.hydropoolnorthwest.co.uk/areas-we-cover/high-peak-derbyshire) - [Lake District](https://www.hydropoolnorthwest.co.uk/areas-we-cover/lake-district) - [Lancashire](https://www.hydropoolnorthwest.co.uk/areas-we-cover/lancashire) - [Liverpool](https://www.hydropoolnorthwest.co.uk/areas-we-cover/liverpool-merseyside) - [Manchester](https://www.hydropoolnorthwest.co.uk/areas-we-cover/manchester) - [North Wales](https://www.hydropoolnorthwest.co.uk/areas-we-cover/north-wales) - How We Help - [Chronic Illnesses](https://www.hydropoolnorthwest.co.uk/who-we-serve/chronic-condition-conquerors) - [Disabled People](https://www.hydropoolnorthwest.co.uk/who-we-serve/disabled-people) - [Families](https://www.hydropoolnorthwest.co.uk/who-we-serve/families) - [Injury Recover](https://www.hydropoolnorthwest.co.uk/who-we-serve/injury-recovery) - [Pregnancy](https://www.hydropoolnorthwest.co.uk/hot-tub-swim-spa-health-benefits/maternity-fitness) - [Property Developers](https://www.hydropoolnorthwest.co.uk/who-we-serve/property-developers) - [Seniors](https://www.hydropoolnorthwest.co.uk/who-we-serve/seniors) - [Sports Enthusiasts](https://www.hydropoolnorthwest.co.uk/who-we-serve/sports-enthusiasts) - Products - Luxury Hot Tubs - [Self-Cleaning Hot Tubs](https://www.hydropoolnorthwest.co.uk/self-cleaning-hot-tubs) - [Energy Efficient Hot Tubs](https://www.hydropoolnorthwest.co.uk/energy-efficient-hot-tubs) - [Full Hot Tub Collection](https://www.hydropoolnorthwest.co.uk/hot-tubs) - Resistance Swim Spas - [Luxury Swim Spas](https://www.hydropoolnorthwest.co.uk/luxury-swim-spas) - [Fitness Swim Spa](https://www.hydropoolnorthwest.co.uk/fitness-swim-spas) - [Family Swim Spa](https://www.hydropoolnorthwest.co.uk/spa/13ffp-aquaplay) - [Full Swim Spa Collection](https://www.hydropoolnorthwest.co.uk/swim-spas) - Buildings & Gazebos - [BBQ Cabins](https://www.hydropoolnorthwest.co.uk/bbq-cabins) - [Garden Buildings](https://www.hydropoolnorthwest.co.uk/garden-buildings) - [Gazebos](https://www.hydropoolnorthwest.co.uk/gazebos) - - [Brochures & Guides](https://blog.hydropoolnorthwest.co.uk/downloads) - [Clearance & Ex-Display Sale](https://www.hydropoolnorthwest.co.uk/hydropool-clearance) - [Hydropool Spare Parts](https://www.hydropoolnorthwest.co.uk/hydropool-brand-parts) - Services - - [Installations](https://www.hydropoolnorthwest.co.uk/hot-tub-swim-spa-installations) - [Hydropool Spa Servicing](https://www.hydropoolnorthwest.co.uk/hot-tub-servicing) - [Hydropool Brand Repairs](https://www.hydropoolnorthwest.co.uk/parts-repair-enquiry) - Resources - Resources - [Blog](https://blog.hydropoolnorthwest.co.uk/) - [Brochures & Guides](https://blog.hydropoolnorthwest.co.uk/downloads) - [Owner's Hub](https://www.hydropoolnorthwest.co.uk/owners-hub) - FAQs - [BBQ Cabins](https://www.hydropoolnorthwest.co.uk/faqs/bbq-cabin) - [Hot Tub](https://www.hydropoolnorthwest.co.uk/faqs/hot-tub) - [Swim Spa](https://www.hydropoolnorthwest.co.uk/faqs/swim-spa-faqs) - Get In Touch - [Get In Touch](https://www.hydropoolnorthwest.co.uk/contact) - [Hydropool Repair Inquiry](https://www.hydropoolnorthwest.co.uk/parts-repair-enquiry) - [Request Hydropool Parts](https://www.hydropoolnorthwest.co.uk/parts-repair-enquiry) - Hydrotherapy - [Athletic Recovery](https://www.hydropoolnorthwest.co.uk/hot-tub-swim-spa-health-benefits/athletic-recovery) - [Health Benefits](https://www.hydropoolnorthwest.co.uk/hot-tub-swim-spa-health-benefits) - [Low Impact Fitness](https://www.hydropoolnorthwest.co.uk/hot-tub-swim-spa-health-benefits/low-impact-fitness) - [Massage Programs](https://www.hydropoolnorthwest.co.uk/hot-tub-swim-spa-health-benefits/exclusive-programmes) - [Maternity Fitness](https://www.hydropoolnorthwest.co.uk/hot-tub-swim-spa-health-benefits/maternity-fitness) - [Pain Management](https://www.hydropoolnorthwest.co.uk/hot-tub-swim-spa-health-benefits/pain-management) - [Rehabilitation](https://www.hydropoolnorthwest.co.uk/hot-tub-swim-spa-health-benefits/rehabilitation) # Troubleshoot: Hot Tub or Swim Spa Not Heating June 14, 2024 ![](https://blog.hydropoolnorthwest.co.uk/hubfs/Troubleshoot-Hot-Tub-Or-Swim-Spa-Not-Heating.jpg) ### View Posts By Topics - [Hot Tubs (49)](https://blog.hydropoolnorthwest.co.uk/tag/hot-tubs) - [Swim Spas (35)](https://blog.hydropoolnorthwest.co.uk/tag/swim-spas) - [Maintenance (24)](https://blog.hydropoolnorthwest.co.uk/tag/maintenance) - [purchase advice (17)](https://blog.hydropoolnorthwest.co.uk/tag/purchase-advice) - [Hydrotherapy (16)](https://blog.hydropoolnorthwest.co.uk/tag/hydrotherapy) - [Fitness (13)](https://blog.hydropoolnorthwest.co.uk/tag/fitness) - [Water Chemistry (11)](https://blog.hydropoolnorthwest.co.uk/tag/water-chemistry) - [BBQ Cabins (10)](https://blog.hydropoolnorthwest.co.uk/tag/bbq-cabins) - [Garden Design (10)](https://blog.hydropoolnorthwest.co.uk/tag/garden-design) - [Troubleshooting (10)](https://blog.hydropoolnorthwest.co.uk/tag/troubleshooting) - [Tips & Tricks (9)](https://blog.hydropoolnorthwest.co.uk/tag/tips-tricks) - [Garden Buildings (6)](https://blog.hydropoolnorthwest.co.uk/tag/garden-buildings) - [Hospitality (6)](https://blog.hydropoolnorthwest.co.uk/tag/hospitality) - [Hydropool Exclusive (5)](https://blog.hydropoolnorthwest.co.uk/tag/hydropool-exclusive) - [Recipes (4)](https://blog.hydropoolnorthwest.co.uk/tag/recipes) - [Science (4)](https://blog.hydropoolnorthwest.co.uk/tag/science) - [Party Planning (3)](https://blog.hydropoolnorthwest.co.uk/tag/party-planning) see all A common issue with [hot tubs](https://www.hydropoolnorthwest.co.uk/hot-tubs) is that the heat pump or circulation pump may stop working. This can be daunting for first time purchasers of hot tubs. If your spa seems to be working properly but your hot tub water is cold, this guide will walk you through a few simple steps to try before contacting your friendly neighbourhood hot tub technician. ### Step 1: Is the hot tub in Economy Mode? Economy modes often allow the temperature to drop around 10-11 degrees from the set temperature before the heater kicks in. Sometimes it can be easy to accidentally put the hot tub into economy mode with a sequence of button presses, or with kids playing around with the topside control. To navigate to the economy mode setting on a Self-Cleaning Hot Tub: Settings > Water Care > Find Water Care Profile > Press Pencil Icon on Right hand Side. At the top of the page you'll see two tabs, Filtration and Economy. Choose the Economy Tab and from here you can set up economy mode timings by adding an Economy Cycle. The Self-Cleaning Economy Mode is off if the Standard Mode is green checked on (see image below). ![Example of Hydropool Self-Cleaning Control Showing the Economy Water Care Settings](https://blog.hydropoolnorthwest.co.uk/hs-fs/hubfs/Troubleshoot-Hot-Tub-Or-Swim-Spa-Not-Heating1.jpg?width=338&height=322&name=Troubleshoot-Hot-Tub-Or-Swim-Spa-Not-Heating1.jpg) To navigate to the economy mode setting on a Serenity Hot Tub: Press and hold the light button 5 secs until clock hours flash on display > tap button until you see "EP" > Use Arrow Keys to Navigate to 0 (mode disabled) or 1 (mode enabled) > Press Light Button to move to "ES" for Economy Start Time > Use Arrow Keys to Choose the Start Time > > Press Light Button to move to "ED" for Economy Duration > Use Arrow Keys to Choose the Length of Mode > Tap Light Button until You Return to Main Screen. You will know the program is on if the display toggles between time, temp, and ECO. [Speak to Our Friendly Team](https://www.hydropoolnorthwest.co.uk/contact) ### Step 2: Can you see water flowing as normal, or is the water still?  Make sure there are no Error codes displayed on your hot tub's topside control. Codes read as: FLO, FL2, HL, and DRY. These error codes will suspend your hot tubs normal working actions, no pumps, circulation, or heating. See our guide to learn what these codes mean, and how to troubleshoot them.  We want you to be able to swiftly solve any problem you can to get you back to relaxation, see our guide on how to solve Flow Errors for more solutions.  If your hot tub isn't heating but you have no error code proceed to the next step.  ### Step 3: Check your breaker settings. Following your spa model manual, you should be able to find out what your spas RCD Amperage settings are. Please follow your manuals guidance or consult your spa dealership prior to changing any electrical settings for your hot tub. If your spa amperage setting is not correct it may be switching the heater off while running the pumps, to avoid drawing too much power and tripping your RCD. For example, a 32amp tub (as described in the spa manual) may be set to 16amps, only allowing limited functions of the pumps and heater at any one time. Don't change any setting unless advised, you can do serious damage by running your hot tub at the wrong amperage. You don't want to knock out your neighbourhood grid! If you’ve considered all of the above and are still having issues, call your dealership or hot tub technician ([That might be us!](https://www.hydropoolnorthwest.co.uk/contact)). They may be able to suggest further steps for you brand or hot tub, or recommend a call out. [![Download your guide to simple spa maintenance by Hydropool North West here](https://hubspot-no-cache-eu1-prod.s3.amazonaws.com/cta/default/143620847/interactive-295457362135.png)](https://blog.hydropoolnorthwest.co.uk/hs/cta/wi/redirect?encryptedPayload=AVxigLIDQwGMDDaRZoJnP4BjikyTZV2YjQvneQGpvZleY0s0QWIxrOvGSjGxAPOUL1884aC9P%2FVp8eal5jv4blRKEqLEDn63v4rM%2BrvP7fbqmxcnOGnWncZrhtMt7euGD%2FKZNpg8P4XwhBLHeDCXpPr3wiKSjU8SZLX%2BMRON5F%2B2PF1TvCgh1ZyZFvmHVsh6jd1vwn9go2WAMsnjMOfju9LFqe3sUOBTpg%3D%3D&webInteractiveContentId=295457362135&portalId=143620847) [![facebook-icon](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/HPNWFacebook-bl.svg)](https://www.facebook.com/hydropoolnorthwest) [![instagram-icon](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/HPNWinstagram-bl.svg)](https://www.instagram.com/hydropoolnorthwest/) [![pinterest-icon](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/HPNWPinterest-bl.svg)](https://uk.pinterest.com/hydropoolnorthwest/) [![x-icon](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/hpnwX-bl.svg)](https://x.com/HydropoolNW) [![linkedin-icon](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/hpnwLinkedIn-bl.svg)](https://uk.linkedin.com/company/hydropool-north-west) [![youtube-icon](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/HPNWYoutube-bl.svg)](https://www.youtube.com/HydropoolmanchesterUk) ### Latest Articles [Frequently Asked Questions: Your One-Stop Guide To Family Hot Tubs](https://blog.hydropoolnorthwest.co.uk/one-stop-guide-to-family-hot-tubs) [Top Reasons To Upgrade From An Inflatable Hot Tub In 2026](https://blog.hydropoolnorthwest.co.uk/top-reasons-to-upgrade-from-an-inflatable-hot-tub-in-2026) [Why Do Some Hot Tubs Cost £20k? (Understanding Spa Builds)](https://blog.hydropoolnorthwest.co.uk/why-do-some-hot-tubs-cost-20k) [Soaking Away Worries: The Benefits Of Hot Tubs For Seniors](https://blog.hydropoolnorthwest.co.uk/benefits-of-hot-tubs-for-seniors) ### Subscribe to our blog This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. ## Recent Posts [See All](https://blog.hydropoolnorthwest.co.uk/) ![A family of four enjoy a Serenity hot tub on a sunny afternoon. ](https://blog.hydropoolnorthwest.co.uk/hubfs/Frequently-Asked-Questions-Your-One-Stop-Guide-To-Family-Hot-Tubs.jpg) ## [Frequently Asked Questions: Your One-Stop Guide...](https://blog.hydropoolnorthwest.co.uk/one-stop-guide-to-family-hot-tubs) At Hydropool North West, we know that choosing a hot tub for your family is about more than just... ![A split-screen style photo showing a ](https://blog.hydropoolnorthwest.co.uk/hubfs/Top-Reasons-to-Upgrade-from-an-Inflatable-Hot-Tub-In-2026.jpg) ## [Top Reasons To Upgrade From An Inflatable Hot Tub...](https://blog.hydropoolnorthwest.co.uk/top-reasons-to-upgrade-from-an-inflatable-hot-tub-in-2026) If you’ve spent the last couple of years enjoying a Lay-Z-Spa or a standard blow up hot tub, you... ![A mother and daughter using a luxury self-cleaning hot tub. ](https://blog.hydropoolnorthwest.co.uk/hubfs/Why-Do-Some-Hot-Tubs-Cost-20k-Understanding-Spa-Builds.jpg) ## [Why Do Some Hot Tubs Cost £20k? (Understanding...](https://blog.hydropoolnorthwest.co.uk/why-do-some-hot-tubs-cost-20k) If you have been browsing the market for a new addition to your garden in Greater Manchester,... ![A senior woman enjoys a hot tub with drink in her hand. ](https://blog.hydropoolnorthwest.co.uk/hubfs/Soaking-Away-Worries-The-Benefits-Of-Hot-Tubs-For-Seniors.jpg) ## [Soaking Away Worries: The Benefits Of Hot Tubs...](https://blog.hydropoolnorthwest.co.uk/benefits-of-hot-tubs-for-seniors) As the years roll by, we all start to value the quieter moments a little more. In the North West,... ![Winner of the Gold Standard Hot Tub Award - Swim Spa Project](https://blog.hydropoolnorthwest.co.uk/hubfs/Hydropool_NorthWest_Theme/Images/Swim%20Spa%20Badge.png) ![Winner of the Gold Standard Hot Tub Award - Hot Tub Project](https://blog.hydropoolnorthwest.co.uk/hubfs/Hydropool_NorthWest_Theme/Images/BadgeHotTub.png) ![What Spa? Approved Retailer 2025](https://static.wixstatic.com/media/4dc466_49e838e88e874d6db9ef617de70b42a9~mv2.webp/v1/fill/w_93,h_83,al_c,q_80,usm_1.20_1.00_0.01,enc_auto/2025-WhatSpa-Approved-Retailer-HydropoolNorthwest.webp) ![What Swim Spa? Approved Retailer 2025](https://static.wixstatic.com/media/4dc466_cea5b6689a0647e181ddadffcff0d53f~mv2.webp/v1/fill/w_93,h_83,al_c,q_80,usm_1.20_1.00_0.01,enc_auto/2025-WhatSwimSpa-Approved-Retailer-Logo.webp) ![TODO](https://static.wixstatic.com/media/4dc466_9b0cee3cee3b49e893e91bffe841367b~mv2.png/v1/fill/w_224,h_61,al_c,q_85,usm_1.20_1.00_0.01,enc_auto/4dc466_9b0cee3cee3b49e893e91bffe841367b~mv2.png) #### Our Accolades & Accreditations LEARN MORE ![](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/Hydropool_NW_Logo_Blue_WebHead.png) **126 Stamford St Central, Ashton-U-Lyne, OL6 6AD** Open Tues-Sat 10-16:00, Sun/Mon By Appointment Only 01612 926649 hello@hydropoolnorthwest.co.uk [![](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/Facebook-bronze.svg)](https://www.facebook.com/hydropoolnorthwest) [![](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/instagram-bronze.svg)](https://www.instagram.com/hydropoolnorthwest/) [![](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/pinterest-bronze.svg)](https://uk.pinterest.com/hydropoolnorthwest/) [![](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/x-bronze.svg)](https://x.com/HydropoolNW) [![](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/linkedin-bronze.svg)](https://uk.linkedin.com/company/hydropool-north-west) [![](https://blog.hydropoolnorthwest.co.uk/hubfs/October%20Theme/youtube-bronze.svg)](https://www.youtube.com/HydropoolmanchesterUk) #### Our Products [Full Hot Tub Collection](https://www.hydropoolnorthwest.co.uk/hot-tubs) [Full Swim Spa Collection](https://www.hydropoolnorthwest.co.uk/swim-spas) [BBQ Cabins](https://www.hydropoolnorthwest.co.uk/bbq-cabins) [Garden Buildings](https://www.hydropoolnorthwest.co.uk/garden-buildings) [Gazebos](https://www.hydropoolnorthwest.co.uk/gazebos) [Product FAQs](https://www.hydropoolnorthwest.co.uk/faqs) #### Our Coverage [Areas We Serve](https://www.hydropoolnorthwest.co.uk/areas-we-cover) [Who We Serve](https://www.hydropoolnorthwest.co.uk/who-we-serve) [Our Projects](https://www.hydropoolnorthwest.co.uk/case-studies) #### Resources [Health Benefits](https://www.hydropoolnorthwest.co.uk/hot-tub-swim-spa-health-benefits) [Blog Posts](https://blog.hydropoolnorthwest.co.uk/) [Owner's Hub](https://www.hydropoolnorthwest.co.uk/owners-hub) #### More Information [About Us](https://www.hydropoolnorthwest.co.uk/about-us) [Hydropool Brand Repairs](https://www.hydropoolnorthwest.co.uk/parts-repair-enquiry) [Hydropool Spa Servicing](https://www.hydropoolnorthwest.co.uk/hot-tub-servicing) [Hydropool Spare Parts](https://www.hydropoolnorthwest.co.uk/hydropool-brand-parts) [Installations](https://www.hydropoolnorthwest.co.uk/hot-tub-swim-spa-installations) - [Privacy Policy |](https://www.hydropoolnorthwest.co.uk/privacy-policy-etc) - [Complaints Procedure |](https://www.hydropoolnorthwest.co.uk/privacy-policy-etc) - [Vulnerable Customer Statement](https://www.hydropoolnorthwest.co.uk/privacy-policy-etc) Copyright 2024-2025 © Cabins & Spas Ltd. All rights reserved. Credit is subject to status and affordability. Terms & Conditions Apply. Cabins & Spas Ltd FRN: 621929 Notcutts Garden Centre, Lord Sheldon Way, Ashton-under-Lyne, OL6 7UB trading as Hydropool North West is a credit broker, not the lender and is authorised and regulated by the Financial Conduct Authority. Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC. Authorised and Regulated by the Financial Conduct Authority. ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Matthew", "url" : "https://blog.hydropoolnorthwest.co.uk/author/matthew" }, "dateModified" : "2025-11-13T15:45:19.216Z", "datePublished" : "2024-06-14T10:11:48.000Z", "headline" : "Troubleshooting Hot Tub Or Swim Spa Not Heating Up", "image" : [ "https://blog.hydropoolnorthwest.co.uk/hubfs/Troubleshoot-Hot-Tub-Or-Swim-Spa-Not-Heating.jpg" ], "mainEntityOfPage" : { "@id" : "https://blog.hydropoolnorthwest.co.uk/troubleshoot-spa-not-heating", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://blog.hydropoolnorthwest.co.uk/hubfs/Hydropool_NorthWest_Theme/Images/Hydropool_NW_Logo_White_WebHead.webp" } } } ```