{"id":2229,"date":"2026-11-11T09:18:46","date_gmt":"2026-11-11T09:18:46","guid":{"rendered":"https:\/\/www.rapidheat247.co.uk\/blog\/?p=2229"},"modified":"2026-11-11T09:18:50","modified_gmt":"2026-11-11T09:18:50","slug":"emergency-boiler-repair-london-vaillant-codes","status":"publish","type":"post","link":"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-vaillant-codes\/","title":{"rendered":"Your Vaillant Is Shouting. Here&#8217;s What the Codes Mean\u00a0"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Your Vaillant flashes a code at 6am. The house is cold, the shower is not happening, and every guide online tells you to &#8220;call an engineer&#8221;. That does not help when you cannot tell whether it is urgent.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide sorts Vaillant fault codes into three groups. <strong>Red<\/strong> means stop and call now. <strong>Amber<\/strong> means call today. <strong>Green<\/strong> means try one safe check first. It covers codes most guides skip, so you can tell when you need emergency boiler repair London homeowners can book at any hour, and when it can wait until morning.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quick answer:<\/strong> Find your code in the table below. If it is F.20, F.61, F.62 or F.67, stop pressing reset and call a Gas Safe registered engineer straight away. If you smell gas, open the windows, leave the property and call the National Gas Emergency Service on 0800 111 999.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Why Does a Vaillant Boiler Show a Fault Code?<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Your boiler keeps watch over its flame, water pressure, temperatures, fan and electronics. When one reading goes outside the safe range, the boiler locks out and shows a code that starts with F.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The code does not mean the boiler is finished. It tells an engineer where to look first. Vaillant lists its codes by model, and the wording can differ slightly between the ecoTEC Plus, ecoTEC Pro and ecoFIT Pure ranges. Check your manual if your display looks different.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Many <a href=\"https:\/\/www.rapidheat247.co.uk\/blog\/vaillant-boiler-problems-no-more-unveiling-proven-repair-methods\/\" target=\"_blank\" rel=\"noopener\">Vaillant boiler problems<\/a> start with something simple, such as low pressure. Others involve gas, so the sensible rule is to know which group your code belongs to before you press anything.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Red, Amber, Green: The Vaillant Code Cheat Sheet<\/strong>&nbsp;<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Code<\/strong>&nbsp;<\/td><td><strong>What the boiler is telling you<\/strong>&nbsp;<\/td><td><strong>Verdict<\/strong>&nbsp;<\/td><td><strong>Next step<\/strong>&nbsp;<\/td><\/tr><tr><td>F.20&nbsp;<\/td><td>Overheating safety switch-off&nbsp;<\/td><td>Red&nbsp;<\/td><td>Stop and call now&nbsp;<\/td><\/tr><tr><td>F.61&nbsp;<\/td><td>Gas valve actuation fault&nbsp;<\/td><td>Red&nbsp;<\/td><td>Stop and call now&nbsp;<\/td><\/tr><tr><td>F.62&nbsp;<\/td><td>Gas valve switch-off delay&nbsp;<\/td><td>Red&nbsp;<\/td><td>Stop and call now&nbsp;<\/td><\/tr><tr><td>F.67&nbsp;<\/td><td>Implausible flame signal&nbsp;<\/td><td>Red&nbsp;<\/td><td>Stop and call now&nbsp;<\/td><\/tr><tr><td>F.32&nbsp;<\/td><td>Fan fault&nbsp;<\/td><td>Amber&nbsp;<\/td><td>Call today&nbsp;<\/td><\/tr><tr><td>F.64&nbsp;<\/td><td>Electronics or temperature sensor fault&nbsp;<\/td><td>Amber&nbsp;<\/td><td>Call today&nbsp;<\/td><\/tr><tr><td>F.72&nbsp;<\/td><td>Flow or return temperature sensor fault&nbsp;<\/td><td>Amber&nbsp;<\/td><td>Call today&nbsp;<\/td><\/tr><tr><td>F.73&nbsp;<\/td><td>Water pressure sensor signal out of range&nbsp;<\/td><td>Amber&nbsp;<\/td><td>Call today&nbsp;<\/td><\/tr><tr><td>F.49&nbsp;<\/td><td>eBUS communication fault&nbsp;<\/td><td>Green&nbsp;<\/td><td>One safe check&nbsp;<\/td><\/tr><tr><td>F.65&nbsp;<\/td><td>Electronics temperature too high&nbsp;<\/td><td>Green&nbsp;<\/td><td>One safe check&nbsp;<\/td><\/tr><tr><td>F.22&nbsp;<\/td><td>Low water pressure&nbsp;<\/td><td>Green&nbsp;<\/td><td>Repressurise once&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This ranking is our practical guide, based on whether a code involves gas, flame or safety systems. Your boiler manual always has the final word.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Red Codes: Stop Pressing Reset and Call<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Red codes involve overheating, gas or flame detection. These are safety systems, and they are doing their job when they shut the boiler down. Resetting over and over does not fix the cause. It simply asks the boiler to try again with the same fault.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>F.20: The Boiler Overheated and Shut Itself Down<\/strong>&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">F.20 is a safety switch-off because an overheating temperature was reached. Causes range from poor circulation to a faulty sensor or electronics, and you cannot tell which by looking.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Leave the heating off and do not keep resetting. An engineer needs to find out why the boiler got too hot before it runs again.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>F.61 and F.62: The Gas Valve Is Not Behaving<\/strong>&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vaillant describes F.61 as a gas valve actuation fault, meaning the control board cannot operate the valve properly. F.62 is a switch-off delay, where the valve is slow to close after the flame goes out. The exact wording differs slightly between models.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Both faults involve the part that controls gas flow to the burner. In the UK, only a Gas Safe registered engineer can legally work on it. Switch the boiler off and call.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>F.67: The Flame Signal Makes No Sense<\/strong>&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">F.67 means the boiler is receiving an implausible flame signal. The cause could be the flame monitoring or the control board. Because it relates to flame detection, treat it as urgent.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The flame and ignition codes F.27, F.28, F.29 and F.75 are also red. We explain them in our guide to the <a href=\"https:\/\/www.rapidheat247.co.uk\/blog\/vaillant-fault-codes-stop-resetting\/\" target=\"_blank\" rel=\"noopener\">Vaillant fault codes you should not keep resetting<\/a>, and our <a href=\"https:\/\/www.rapidheat247.co.uk\/blog\/vaillant-f75-error-code-meaning-fix-london\/\" target=\"_blank\" rel=\"noopener\">F.75 guide<\/a> goes deeper on the pump fault.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Amber Codes: Call Today<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Amber codes do not point to gas, but the boiler still cannot run safely without the part that failed. You can usually book the same day rather than wake someone at midnight, unless you have no heating in freezing weather or someone vulnerable at home.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>F.32: The Fan Fault<\/strong>&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The fan clears combustion gases from the boiler, so the boiler will not fire if it cannot confirm the fan is working. Check the boiler has power and press reset once. If F.32 returns, you need an engineer to test the fan and its wiring.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>F.64, F.72 and F.73: The Boiler Cannot Trust Its Sensors<\/strong>&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">These three codes are all about readings the boiler depends on.&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>F.64<\/strong> points to an electronics or temperature sensor fault, such as a short-circuited flow or return sensor.\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>F.72<\/strong> means the flow or return temperature sensor has a fault.\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>F.73<\/strong> means the water pressure sensor signal is outside its expected range.\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">With F.73, check the pressure gauge. If the gauge looks normal but the boiler still complains, the sensor or its wiring is the likely suspect. An engineer can test both quickly.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sensor faults are rarely dramatic, which is why people ignore them. A boiler running on bad readings can lock out at the worst moment, so book a visit before the next cold snap.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Green Codes: Try One Safe Check First<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Green does not mean ignore it. It means one simple check is worth doing before you call. If the code comes back, move it up to amber.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>F.49: The eBUS Fault<\/strong>&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The eBUS is the communication line between the boiler and its controls. F.49 points to a short circuit, an overload, or two power supplies on that line.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Switch the boiler off at the isolator, wait a minute, then switch it on once. If you recently added a smart thermostat or controller, tell the engineer. Do not open the boiler or touch any wiring yourself.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>F.65: The Electronics Are Too Hot<\/strong>&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">F.65 means the electronics temperature is too high, which can come from external heat or a faulty board. Check that nothing is covering or stacked against the boiler and that any cupboard around it has the ventilation your manual asks for. Let it cool, then reset once.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>F.22: Low Water Pressure<\/strong>&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">F.22 is the most common code and the one you can often fix yourself. Bring the pressure back to the level in your manual using the filling loop, then reset once. If the pressure keeps dropping, read why a <a href=\"https:\/\/www.rapidheat247.co.uk\/blog\/boiler-losing-pressure-causes-fixes\/\" target=\"_blank\" rel=\"noopener\">boiler keeps losing pressure<\/a>.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What to Do Tonight Before the Engineer Arrives<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A cold house is stressful, so use this short routine while you wait.&nbsp;<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Check for gas or carbon monoxide.<\/strong> If you smell gas or your CO alarm sounds, open the windows, leave and call 0800 111 999.\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>Photograph the display.<\/strong> Note the exact code and the time.\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>Reset once at most.<\/strong> Write down whether the code came back and how quickly.\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>Read the pressure gauge.<\/strong> Note the figure.\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li><strong>Check the basics.<\/strong> Look at the thermostat batteries, the programmer and the timer.\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"6\" class=\"wp-block-list\">\n<li><strong>Keep warm safely.<\/strong> Use blankets and warm layers, and keep babies, older people and anyone unwell warm first. Never use a gas hob or oven for heat.\u00a0<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">This matters in autumn. British Gas warned in October that around 34,000 homes could lose heating or hot water in the first cold snap, because boilers that sit idle all summer often fail when they are asked to work hard again.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>When Is It Emergency Boiler Repair in London?<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Call straight away if you smell gas, your CO alarm sounds, water is leaking from the boiler, or your code is red. Call straight away too if there is no heating and someone vulnerable is at home, or if freezing weather is close.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An amber or green code can usually wait for a same-day visit. If you are not sure, our guide on <a href=\"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-real-or-not\/\" target=\"_blank\" rel=\"noopener\">whether you need an emergency boiler engineer right now<\/a> walks through the decision.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What to Tell the Engineer When You Call<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A clear call saves time on the doorstep. Have this ready:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The exact code and what the display showed\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Your boiler model, usually printed on the front panel\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>How many times you pressed reset\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The pressure gauge reading\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Any noises, smells or leaks\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Whether your hob still works\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>When the boiler was last serviced\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">With these details, the engineer can arrive with the right parts and avoid a second visit.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How to Choose a Vaillant Engineer in London<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When the heating is off, it is tempting to book the first number you see. Take two minutes to check these points.&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Gas Safe registration.<\/strong> Ask to see the engineer&#8217;s ID card, or check them on the Gas Safe Register website.\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Vaillant experience.<\/strong> If you are searching for Vaillant approved service engineers, ask for proof of Vaillant training or accreditation rather than trusting a logo.\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A clear quote.<\/strong> You should know the call-out charge and how time and parts are charged before work starts.\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Our Gas Safe registered engineers cover London and the area within the M25 from our Hackney base, 24 hours a day, 365 days a year. See our <a href=\"https:\/\/www.rapidheat247.co.uk\/vaillant-boiler-repair-in-hackney.php\" target=\"_blank\" rel=\"noopener\">Vaillant boiler repair in Hackney<\/a> page or our <a href=\"https:\/\/www.rapidheat247.co.uk\/emergency-boiler-repair-in-city-of-london.php\" target=\"_blank\" rel=\"noopener\">emergency boiler repair service<\/a> for details. For the wider picture, read our guide to <a href=\"https:\/\/www.rapidheat247.co.uk\/blog\/vaillant-boiler-repair-service-london-what-every-homeowner-needs-to-know\/\" target=\"_blank\" rel=\"noopener\">Vaillant boiler repair services in London<\/a> and our full <a href=\"https:\/\/www.rapidheat247.co.uk\/blog\/vaillant-boiler-error-codes-guide-london\/\" target=\"_blank\" rel=\"noopener\">Vaillant error codes guide<\/a>.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Will an Emergency Call-Out Cost?<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The price depends on the fault, the time of day and any parts needed. Our current rates are on our <a href=\"https:\/\/www.rapidheat247.co.uk\/pricing.php\" target=\"_blank\" rel=\"noopener\">pricing page<\/a>, and you should always ask for the call-out charge and parts costs before work begins.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Stop Faults Coming Back<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Most red and amber faults are easier to catch early. An annual <a href=\"https:\/\/www.rapidheat247.co.uk\/boiler-maintenance-companies-london.php\" target=\"_blank\" rel=\"noopener\">boiler service<\/a> checks the parts that cause lockouts, and older systems with sludge may need a <a href=\"https:\/\/www.rapidheat247.co.uk\/power-flushing-services.php\" target=\"_blank\" rel=\"noopener\">power flush<\/a>. Booking in autumn is far easier than booking in a January emergency.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Vaillant Showing a Code? Get Help Now<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Don&#8217;t sit in a cold house guessing. If your Vaillant is showing a red code, or an amber code that keeps returning, our Gas Safe registered engineers are ready to help with emergency boiler repair across London.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Call 07888078885 now<\/strong>, <a href=\"https:\/\/www.rapidheat247.co.uk\/emergency-callout-booking-form.php\" target=\"_blank\" rel=\"noopener\">book an emergency call-out online<\/a>, or visit <a href=\"https:\/\/www.rapidheat247.co.uk\/\" target=\"_blank\" rel=\"noopener\">www.rapidheat247.co.uk<\/a> to see all our boiler repair and servicing options.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Frequently Asked Questions<\/strong>&nbsp;<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1794384696075\"><strong class=\"schema-faq-question\"><strong>What does a fault code mean on a Vaillant boiler?<\/strong>\u00a0<\/strong> <p class=\"schema-faq-answer\">A Vaillant fault code tells you which system the boiler has detected a problem with, such as flame, pressure, temperature, the fan or the electronics. It shuts the boiler down to keep it safe. The exact wording can vary slightly by model, so check your manual.\u00a0<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1794384712434\"><strong class=\"schema-faq-question\"><strong>Which Vaillant fault codes need emergency repair?<\/strong>\u00a0<\/strong> <p class=\"schema-faq-answer\">Treat F.20, F.61, F.62 and F.67 as red codes that need an engineer straight away. The ignition and flame codes F.27, F.28, F.29 and F.75 also need an engineer. Call immediately if you smell gas or your CO alarm sounds.\u00a0<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1794384747069\"><strong class=\"schema-faq-question\"><strong>Is it safe to reset a Vaillant boiler?<\/strong>\u00a0<\/strong> <p class=\"schema-faq-answer\">You can reset once, then check whether the code returns. If it comes back, stop. Repeated resets do not fix the cause and can hide a safety fault.\u00a0<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1794384773976\"><strong class=\"schema-faq-question\"><strong>Can I fix a Vaillant fault code myself?<\/strong>\u00a0<\/strong> <p class=\"schema-faq-answer\">Some green codes, such as low pressure, allow one safe check. Anything involving gas, flame or overheating must be handled by a Gas Safe registered engineer, as it is illegal and unsafe to work on gas parts without registration.\u00a0<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1794384794453\"><strong class=\"schema-faq-question\"><strong>Do you offer emergency boiler repair in London at night and at weekends?<\/strong>\u00a0<\/strong> <p class=\"schema-faq-answer\">Yes. Our engineers are available 24 hours a day, 365 days a year, including nights, weekends and bank holidays.\u00a0<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Your Vaillant flashes a code at 6am. The house is cold, the shower is not happening, and every guide online tells you to &#8220;call an engineer&#8221;. That does not help when you cannot tell whether it is urgent.&nbsp; This guide sorts Vaillant fault codes into three groups. Red means stop and call now. Amber means [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2230,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[40],"tags":[60,55,259,292],"class_list":["post-2229","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-boiler-service","tag-boiler-repair-company-in-london","tag-boiler-repair-in-london","tag-boiler-repair-service-in-london","tag-emergency-boiler-repair-in-london"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Emergency Boiler Repair London: Codes That Can\u2019t Wait<\/title>\n<meta name=\"description\" content=\"Vaillant showing a fault code? 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Here&#8217;s What the Codes Mean\u00a0"}]},{"@type":"WebSite","@id":"https:\/\/www.rapidheat247.co.uk\/blog\/#website","url":"https:\/\/www.rapidheat247.co.uk\/blog\/","name":"Rapidheat Blog","description":"Heating and Plumbing Solutions London","publisher":{"@id":"https:\/\/www.rapidheat247.co.uk\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.rapidheat247.co.uk\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-GB"},{"@type":"Organization","@id":"https:\/\/www.rapidheat247.co.uk\/blog\/#organization","name":"Rapidheat Blog","url":"https:\/\/www.rapidheat247.co.uk\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/www.rapidheat247.co.uk\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/rapidheat247.co.uk\/blog\/wp-content\/uploads\/2022\/10\/rapid-response-p-h-e1666857839489.png","contentUrl":"https:\/\/rapidheat247.co.uk\/blog\/wp-content\/uploads\/2022\/10\/rapid-response-p-h-e1666857839489.png","width":58,"height":100,"caption":"Rapidheat Blog"},"image":{"@id":"https:\/\/www.rapidheat247.co.uk\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/rapidresponse.plumbingheating","https:\/\/x.com\/rapidheat247","https:\/\/www.instagram.com\/rapidheat247.co.uk\/"]},{"@type":"Person","@id":"https:\/\/www.rapidheat247.co.uk\/blog\/#\/schema\/person\/1240ffcab06a39e7904e159fa38e8299","name":"Rapidheat247 Team","image":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/secure.gravatar.com\/avatar\/dfe640bf22d78ff59b5a7fb6cef54edfde5bc3d3c9abde8a3493bbf99984e452?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/dfe640bf22d78ff59b5a7fb6cef54edfde5bc3d3c9abde8a3493bbf99984e452?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/dfe640bf22d78ff59b5a7fb6cef54edfde5bc3d3c9abde8a3493bbf99984e452?s=96&d=mm&r=g","caption":"Rapidheat247 Team"},"sameAs":["https:\/\/rapidheat247.co.uk\/blog"],"url":"https:\/\/www.rapidheat247.co.uk\/blog\/author\/admin\/"},{"@type":"Question","@id":"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-vaillant-codes\/#faq-question-1794384696075","position":1,"url":"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-vaillant-codes\/#faq-question-1794384696075","name":"What does a fault code mean on a Vaillant boiler?\u00a0","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A Vaillant fault code tells you which system the boiler has detected a problem with, such as flame, pressure, temperature, the fan or the electronics. It shuts the boiler down to keep it safe. The exact wording can vary slightly by model, so check your manual.\u00a0","inLanguage":"en-GB"},"inLanguage":"en-GB"},{"@type":"Question","@id":"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-vaillant-codes\/#faq-question-1794384712434","position":2,"url":"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-vaillant-codes\/#faq-question-1794384712434","name":"Which Vaillant fault codes need emergency repair?\u00a0","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Treat F.20, F.61, F.62 and F.67 as red codes that need an engineer straight away. The ignition and flame codes F.27, F.28, F.29 and F.75 also need an engineer. Call immediately if you smell gas or your CO alarm sounds.\u00a0","inLanguage":"en-GB"},"inLanguage":"en-GB"},{"@type":"Question","@id":"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-vaillant-codes\/#faq-question-1794384747069","position":3,"url":"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-vaillant-codes\/#faq-question-1794384747069","name":"Is it safe to reset a Vaillant boiler?\u00a0","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"You can reset once, then check whether the code returns. If it comes back, stop. Repeated resets do not fix the cause and can hide a safety fault.\u00a0","inLanguage":"en-GB"},"inLanguage":"en-GB"},{"@type":"Question","@id":"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-vaillant-codes\/#faq-question-1794384773976","position":4,"url":"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-vaillant-codes\/#faq-question-1794384773976","name":"Can I fix a Vaillant fault code myself?\u00a0","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Some green codes, such as low pressure, allow one safe check. Anything involving gas, flame or overheating must be handled by a Gas Safe registered engineer, as it is illegal and unsafe to work on gas parts without registration.\u00a0","inLanguage":"en-GB"},"inLanguage":"en-GB"},{"@type":"Question","@id":"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-vaillant-codes\/#faq-question-1794384794453","position":5,"url":"https:\/\/www.rapidheat247.co.uk\/blog\/emergency-boiler-repair-london-vaillant-codes\/#faq-question-1794384794453","name":"Do you offer emergency boiler repair in London at night and at weekends?\u00a0","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. Our engineers are available 24 hours a day, 365 days a year, including nights, weekends and bank holidays.\u00a0","inLanguage":"en-GB"},"inLanguage":"en-GB"}]}},"_links":{"self":[{"href":"https:\/\/www.rapidheat247.co.uk\/blog\/wp-json\/wp\/v2\/posts\/2229","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rapidheat247.co.uk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rapidheat247.co.uk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rapidheat247.co.uk\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rapidheat247.co.uk\/blog\/wp-json\/wp\/v2\/comments?post=2229"}],"version-history":[{"count":1,"href":"https:\/\/www.rapidheat247.co.uk\/blog\/wp-json\/wp\/v2\/posts\/2229\/revisions"}],"predecessor-version":[{"id":2231,"href":"https:\/\/www.rapidheat247.co.uk\/blog\/wp-json\/wp\/v2\/posts\/2229\/revisions\/2231"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rapidheat247.co.uk\/blog\/wp-json\/wp\/v2\/media\/2230"}],"wp:attachment":[{"href":"https:\/\/www.rapidheat247.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=2229"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rapidheat247.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=2229"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rapidheat247.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=2229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}