Explore Viessmann boiler fault and error codes and other common boiler issues, like how to repressurise and connect a Viessmann boiler to your Wi-Fi. 

<p>If your Viessmann boiler has stopped working, it can be frustrating, especially if it leaves you without hot water or central heating. To give you an idea of what the problem is, however, an error code will likely be displayed on your boiler&rsquo;s interface.&nbsp;</p>
<p>Viessman <a href="https://www.boxt.co.uk/boilers" rel="follow">boiler</a> fault codes are designed to ensure problems can be diagnosed more quickly, meaning boiler technicians can get your system back up and running more quickly.&nbsp;</p>
<p>To further reduce the time you&rsquo;re left without a functioning boiler, we put this handy guide together so you&rsquo;re not left wondering what&rsquo;s wrong for too long.&nbsp;</p>
<h2>Viessmann fault &amp; error codes by code</h2>
<ul>
<li><a href="#h_232222911108511708094670745" rel="follow">Fault code 5C, 5D, 5E and 5F</a></li>
<li><a href="#h_290959891113001708094726577" rel="follow">Fault code 10</a></li>
<li><a href="#h_941642352115971708094750788" rel="follow">Fault codes F6, 58, F9, F-E1, F-E2 and F-F6</a></li>
<li><a href="#h_78984742118971708094774703" rel="follow">Fault codes 18 and D1</a></li>
<li><a href="#h_497828654121081708094804479" rel="follow">Fault code A4</a></li>
<li><a href="#h_889068054124051708094825684" rel="follow">Fault code OC</a></li>
</ul>
<h2>How to reset a Viessmann boiler</h2>
<p>The way to reset your boiler will vary depending on your Viessman boiler. You may need to turn a dial or press a series of buttons. Make sure to check your boiler&rsquo;s manual for specific instructions relating to your system.&nbsp;</p>
<p>Before resetting your boiler, you must check which fault code is displayed to determine whether you can fix the problem. For example, if your boiler has locked you out because the pressure is too low, this is something you can remedy yourself. You must not attempt difficult or complex repairs, though. Anything requiring more than a simple fix must be repaired by a qualified Gas Safe registered engineer.&nbsp;</p>
<h2>How to increase pressure on a Viessmann boiler</h2>
<p>Most Viessman boilers have an operating pressure of 1-1.5 bar. This is usually shown as a green zone on the pressure gauge.&nbsp;</p>
<p>On Viessmann system and combi boilers, the pressure gauge can be found in the control panel. Meanwhile, for standard (regular or heat-only) boilers, the pressure gauge is fitted in the pipework just below the boiler.&nbsp;</p>

Discover everything you need to know about combi, standard and system boilers

Check out our complete guide

Not sure which type of boiler you have?

<p>Before increasing the pressure on your boiler, you should consult the boiler&rsquo;s instructions for specific guidance and ensure you feel comfortable <a href="https://www.boxt.co.uk/boilers/guides/boiler-pressure" rel="follow">repressurising the boiler</a> yourself. If you are in any doubt about what to do, always contact a Gas Safe registered engineer for help.</p>
<p>If you feel confident in repressurising your boiler, follow the instructions below.</p>
<ol>
<li>Locate the filling loop and pressure gauge - filling loop handles should be at a 90o angle to the flow direction of the pipe.</li>
<li>Make sure you can see the pressure gauge once you find the filling loop. This will help you ensure you&rsquo;re not over- or under-filling the pressure gauge.</li>
<li>The correct pressure level will be shown in green.</li>
<li>Turn the boiler off.</li>
<li>Turn the filling loop handles so they match the direction of the pipe. You should hear water flowing when you do this.</li>
<li>Remember to keep an eye on the pressure gauge so you don&rsquo;t add too much pressure. Once you&rsquo;ve reached the green spot, usually between 1-1.5 bar, make sure the handles are fully closed by returning them to their original position.</li>
<li>Turn the boiler back on and check the pressure remains consistent. If the pressure remains steady, the issue will likely be resolved. If not you should <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">contact a Gas Safe registered engineer</a> to investigate further.&nbsp;</li>
</ol>

How to repressurise your boiler

left

<h2>Viessmann boiler error codes</h2>
<p>Here are some of the most common Viessmann error and fault codes, and what they mean.</p>
<h3 id="h_232222911108511708094670745">Fault codes 5C, 5D, 5E and 5F</h3>
<table border="1" style="border-collapse: collapse; width: 100.054%;"><colgroup><col style="width: 49.9465%;"><col style="width: 49.9465%;"></colgroup>
<tbody>
<tr>
<td><strong>Boiler mode</strong></td>
<td><strong>Problem</strong></td>
</tr>
<tr>
<td>Vitotronic 300-K with Vitotronic 200 control</td>
<td>The system has gone into control mode due to a communication fault.&nbsp;</td>
</tr>
</tbody>
</table>
<h3>Fault code 10</h3>
<table border="1" style="border-collapse: collapse; width: 100.054%;"><colgroup><col style="width: 49.9465%;"><col style="width: 49.9465%;"></colgroup>
<tbody>
<tr>
<td><strong>Boiler mode</strong></td>
<td><strong>Problem</strong></td>
</tr>
<tr>
<td>Vitodens 200-W / 222-F / Vitotronic 300 / 200/ 200-H / 050/200-H / 300-K / vitocontrol-S</td>
<td>The outdoor temperature sensor has short-circuited - the boiler is operating as though the outdoor temperature is 32&deg;F / 0&deg;C.&nbsp;</td>
</tr>
<tr>
<td>Vitotronic 300-K, MW2S with Vitotronic 100 / Vitodens 100-W (combiPLUS) / 200-w / Vitocontrol-S, WB2B with Vitotronic 100</td>
<td>The outdoor temperature sensor has short-circuited - the boiler is operating as though the outdoor temperature is 32&deg;F / 0&deg;C.&nbsp;</td>
</tr>
</tbody>
</table>
<h3>Fault codes F6, 58, F9, F-E1, F-E2 and F-F6</h3>
<table border="1" style="border-collapse: collapse; width: 100.054%; height: 39.1876px;"><colgroup><col style="width: 49.9465%;"><col style="width: 49.9465%;"></colgroup>
<tbody>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;"><strong>Boiler mode</strong></td>
<td style="height: 19.5938px;"><strong>Problem</strong></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">All Viessman boilers</td>
<td style="height: 19.5938px;">The burner is in fault/emergency operation mode.&nbsp;</td>
</tr>
</tbody>
</table>
<h3>Fault codes 18 and D1</h3>
<table border="1" style="border-collapse: collapse; width: 100.054%; height: 215.531px;"><colgroup><col style="width: 49.9465%;"><col style="width: 49.9465%;"></colgroup>
<tbody>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;"><strong>Boiler mode</strong></td>
<td style="height: 19.5938px;"><strong>Problem</strong></td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">Vitodens 100 / 200-W / 222-F / Vitotronic 300-K With 100 / Vitocontrol-S</td>
<td style="height: 39.1875px;">The outdoor temperature sensor is broken - the boiler is operating as though the outdoor temperature is 32&deg;F / 0&deg;C.&nbsp;</td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">Vitotronic / 100 / 200 / 300 / 050/200-H /300-K / Vitocontrol-S, MW1 with Vitotronic 100</td>
<td style="height: 39.1875px;">A circuit on the outdoor temperature sensor is open - the boiler is operating as though the outdoor temperature is 32&deg;F / 0&deg;C.&nbsp;</td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">Vitotronic 200-H / Vitotronic 300-K, MW1B with Vitotronic 300 / Vitotronic 300-K, MW2B with Vitotronic 200</td>
<td style="height: 39.1875px;">The outdoor temperature sensor is broken due to a lead break - the boiler is operating as though the outdoor temperature is 32&deg;F / 0&deg;C.&nbsp;</td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">Vitotronic 050/200-H</td>
<td style="height: 19.5938px;">The outdoor temperature sensor is broken - the boiler is operating as though the outdoor temperature is 32&deg;F / 0&deg;C.&nbsp;</td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">Vitodens 100-W</td>
<td style="height: 19.5938px;">The burner is in fault mode, and DIP switch S2 is turned on.&nbsp;</td>
</tr>
</tbody>
</table>
<h3>Fault code A4</h3>
<table border="1" style="border-collapse: collapse; width: 100.054%;"><colgroup><col style="width: 49.9465%;"><col style="width: 49.9465%;"></colgroup>
<tbody>
<tr>
<td><strong>Boiler mode</strong></td>
<td><strong>Problem</strong></td>
</tr>
<tr>
<td>Vitodens 222 F</td>
<td>The burner is blocked, and the venting program is started automatically - caused by an airlock in the internal circulation pump or the minimum flow rate not being achieved.</td>
</tr>
</tbody>
</table>
<h3>Fault code OC&nbsp;</h3>
<table border="1" style="border-collapse: collapse; width: 100.054%; height: 58.7814px;"><colgroup><col style="width: 49.9465%;"><col style="width: 49.9465%;"></colgroup>
<tbody>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;"><strong>Boiler mode</strong></td>
<td style="height: 19.5938px;"><strong>Problem</strong></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">Vitodens 100-W</td>
<td style="height: 19.5938px;">The burner is blocked due to an insufficient power supply.</td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">Vitodens 200</td>
<td style="height: 19.5938px;">The burner control has switched to lockout due to the flame signal still being present after switching off.&nbsp;</td>
</tr>
</tbody>
</table>
<p></p>

Need to call a Gas Safe registered engineer?

Viessmann fault & error codes

Find full lists of Worcester Bosch boiler error and fault codes with possible causes and fixes. Resolve issues with combi, system and standard boilers.

Worcester Bosch fault & error codes

Find full lists of Ideal boiler error and fault codes alongside possible causes and solutions. Keep your Ideal boiler running smoothly with help from BOXT.

<p>Noticing that there&rsquo;s a fault with your Ideal <a href="https://www.boxt.co.uk/boilers" rel="follow">boiler</a> is less than ideal, but getting it sorted doesn&rsquo;t have to be as much of a hassle as you&rsquo;d expect.</p>
<p>It&rsquo;s important to note that once you&rsquo;ve discovered an issue with your system, a Gas Safe registered engineer needs to be called to diagnose and rectify the problem fully.</p>
<p>To make the process of diagnosing any problems as painless as possible, Ideal pre-programs its boilers with fault and error codes. These codes are displayed on the user interface to alert you and your engineer to anything that needs attention within the system.</p>
<p>Here, we&rsquo;ll cover all of the most common Ideal boiler fault codes, discussing their meaning and advising on any next steps that you or a Gas Safe registered engineer can take to get things back to working as they should.</p>
<h2>Ideal boiler fault &amp; error codes by boiler model</h2>
<ul>
<li><a href="#h_283069789193621705408930675" rel="follow">Ideal boiler F fault codes</a></li>
<li><a href="#h_373458347195981705408940506" rel="follow">Ideal boiler L fault codes</a></li>
<li><a href="#h_651947860197021705408948577" rel="follow">Ideal boiler C fault codes</a></li>
<li><a href="#h_541516278198321705408957447" rel="follow">Additional Ideal boiler fault codes</a></li>
</ul>
<h2 id="h_283069789193621705408930675">Ideal boiler F fault codes</h2>
<table border="1" style="border-collapse: collapse; width: 100.054%; height: 293.907px;"><colgroup><col style="width: 16.4882%;"><col style="width: 40.1695%;"><col style="width: 43.3423%;"></colgroup>
<tbody>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;"><strong>Error code</strong></td>
<td style="height: 19.5938px;"><strong>Problem</strong></td>
<td style="height: 19.5938px;"><strong>Solution</strong></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">F</td>
<td style="height: 19.5938px;">Boiler operating in frost mode.</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">FD</td>
<td style="height: 39.1875px;">No water flow</td>
<td style="height: 39.1875px;">Repressurise the boiler. If this doesn&rsquo;t resolve the issue, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">call an engineer</a>.</td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">FU</td>
<td style="height: 19.5938px;">Flow/return differential &ndash; 50&deg;C</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">F1</td>
<td style="height: 19.5938px;">Low boiler pressure</td>
<td style="height: 19.5938px;">Top up the <a href="https://www.boxt.co.uk/boilers/guides/boiler-pressure" rel="follow">water pressure</a>.</td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">F2/FL</td>
<td style="height: 39.1875px;">Flame loss</td>
<td style="height: 39.1875px;">Reset the boiler. If this doesn&rsquo;t resolve the issue, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">call a Gas Safe engineer</a>.</td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">F3</td>
<td style="height: 19.5938px;">Fan fault</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">F4</td>
<td style="height: 19.5938px;">Thermistor fault</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">F5</td>
<td style="height: 19.5938px;">Return thermistor fault</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">F6</td>
<td style="height: 19.5938px;">Outside sensor fault</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">F7</td>
<td style="height: 19.5938px;">Low mains voltage</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">F8</td>
<td style="height: 19.5938px;">Printed circuit board (PCB) fault</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">F9</td>
<td style="height: 19.5938px;">Unconfigured PCB.</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
</tbody>
</table>
<h2 id="h_373458347195981705408940506">Ideal boiler L fault codes</h2>
<table border="1" style="border-collapse: collapse; width: 100.054%; height: 431.063px;"><colgroup><col style="width: 16.8094%;"><col style="width: 40.0532%;"><col style="width: 43.0303%;"></colgroup>
<tbody>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;"><strong>Error code</strong></td>
<td style="height: 19.5938px;"><strong>Problem</strong></td>
<td style="height: 19.5938px;"><strong>Solution</strong></td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">L1</td>
<td style="height: 39.1875px;">Low water flow</td>
<td style="height: 39.1875px;">Reset the boiler. If this doesn&rsquo;t resolve the issue, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">call an engineer</a>.</td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">L2</td>
<td style="height: 39.1875px;">Ignition lockout</td>
<td style="height: 39.1875px;">Reset the boiler. If you hear a <a href="https://www.boxt.co.uk/boilers/guides/9-reasons-why-your-boiler-is-making-a-noise" rel="follow">rumbling noise</a>, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">call an engineer</a>.</td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">L3</td>
<td style="height: 19.5938px;">No flow thermistor fault</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">L9/H9/HA/LA</td>
<td style="height: 39.1875px;">Overheating</td>
<td style="height: 39.1875px;">Check pressure readings and <a href="https://www.boxt.co.uk/boilers/guides/how-to-bleed-a-radiator" rel="follow">bleed your radiators</a>. If no change, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">call an engineer</a>.</td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">LF</td>
<td style="height: 39.1875px;">Ignition fault</td>
<td style="height: 39.1875px;">Reset your boiler. If your boiler is rumbling, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">contact a qualified engineer</a>.</td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">L4</td>
<td style="height: 39.1875px;">Flow thermistor fault</td>
<td style="height: 39.1875px;">Restart the boiler. If the issue continues, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">contact an engineer</a>.</td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">L5</td>
<td style="height: 39.1875px;">Boiler return pipe issue</td>
<td style="height: 39.1875px;">Turn off the boiler&rsquo;s power at the fuse spur, then turn it back on. If the issue persists, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">call an engineer</a>.</td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">L6</td>
<td style="height: 39.1875px;">Flame detection fault</td>
<td style="height: 39.1875px;">Reset your boiler. If the problem persists, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">contact an engineer</a>.</td>
</tr>
<tr style="height: 58.7812px;">
<td style="height: 58.7812px;">LC</td>
<td style="height: 58.7812px;">5 boiler resets in 15 minutes.</td>
<td style="height: 58.7812px;">Turn the electrical supply to the boiler off and on. If the boiler fails to operate, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">contact a Gas Safe registered engineer</a>.</td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">L9</td>
<td style="height: 19.5938px;">Unconfigured PCB</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">L-F</td>
<td style="height: 19.5938px;">Boiler fails to ignite</td>
<td style="height: 19.5938px;">Try resetting the boiler. If nothing changes, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">contact an engineer</a>.</td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">L-A</td>
<td style="height: 19.5938px;">Boiler overheated</td>
<td style="height: 19.5938px;">Check that there is <a href="https://www.boxt.co.uk/boilers/guides/boiler-pressure" rel="follow">sufficient water pressure</a> in the central heating system and that all radiators have been bled. Then, reset the boiler. If the issue persists, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">contact an engineer</a>.</td>
</tr>
</tbody>
</table>
<h2 id="h_651947860197021705408948577">Ideal boiler C fault codes</h2>
<table border="1" style="border-collapse: collapse; width: 100.054%; height: 117.563px;"><colgroup><col style="width: 17.1306%;"><col style="width: 40.1599%;"><col style="width: 42.6025%;"></colgroup>
<tbody>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;"><strong>Error code</strong></td>
<td style="height: 19.5938px;"><strong>Problem</strong></td>
<td style="height: 19.5938px;"><strong>Solution</strong></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">C2</td>
<td style="height: 19.5938px;">Boiler chip card fault.</td>
<td style="height: 19.5938px;">Reset your boiler. If the issue persists, <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">contact an engineer</a>.</td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">C0</td>
<td style="height: 19.5938px;">Central heating signal issue.</td>
<td style="height: 19.5938px;"><a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Contact an engineer.</a></td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">C</td>
<td style="height: 19.5938px;">The boiler is operating in central heating mode. Or the boiler has a call for central heating, and the appliance has reached the desired set temperature.</td>
<td style="height: 19.5938px;">No solution needed. This is a setting, not a problem.</td>
</tr>
</tbody>
</table>
<h2 id="h_541516278198321705408957447">Additional Ideal boiler fault codes</h2>
<table border="1" style="border-collapse: collapse; width: 100.054%; height: 156.75px;"><colgroup><col style="width: 17.0236%;"><col style="width: 40.3739%;"><col style="width: 42.4955%;"></colgroup>
<tbody>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;"><strong>Error code</strong></td>
<td style="height: 19.5938px;"><strong>Problem</strong></td>
<td style="height: 19.5938px;"><strong>Solution</strong></td>
</tr>
<tr style="height: 58.7812px;">
<td style="height: 58.7812px;">D</td>
<td style="height: 58.7812px;">The boiler is operating in hot water mode, or the boiler has a call for hot water and the appliance has reached the desired set temperature.</td>
<td style="height: 58.7812px;">No solution needed; this is a setting.</td>
</tr>
<tr style="height: 39.1875px;">
<td style="height: 39.1875px;">0</td>
<td style="height: 39.1875px;">The boiler is in standby mode awaiting hot water requests or a central heating call.</td>
<td style="height: 39.1875px;">Choose your settings.</td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">H-3</td>
<td style="height: 19.5938px;">Domestic hot water thermistor error.</td>
<td style="height: 19.5938px;">Reset the system.</td>
</tr>
<tr style="height: 19.5938px;">
<td style="height: 19.5938px;">No display</td>
<td style="height: 19.5938px;">No heating or hot water.</td>
<td style="height: 19.5938px;">This is a PCB error. <a href="https://www.boxt.co.uk/boilers/boiler-repair" rel="follow">Call an engineer</a>.</td>
</tr>
</tbody>
</table>
<h2>Protect your home&rsquo;s central heating with BOXT</h2>
<p>Luckily, the majority of Ideal <a href="https://www.boxt.co.uk/boilers" rel="follow">boiler</a> problems are relatively quick and easy for qualified engineers to fix, provided they&rsquo;re identified promptly. If you suspect that any of the issues mentioned above are to blame for your boiler&rsquo;s malfunctioning, and the recommended fix isn&rsquo;t as simple as pressing the reset button, always contact a Gas Safe registered engineer who&rsquo;ll be able to come and assist you.</p>
<p>Sometimes, it&rsquo;s better to be safe than sorry. We all know that household issues arise when you&rsquo;re least prepared for them, so it helps to have a good idea of how your boiler is performing.&nbsp;</p>
<p>If you&rsquo;re unsure about the current performance of your boiler, why not book a <a href="https://www.boxt.co.uk/boilers/boiler-servicing" rel="follow">boiler service</a>? With the help of our engineers, you&rsquo;ll be sound in the knowledge that your boiler is doing the most it can possibly do for your home.</p>

Ideal boiler fault & error codes

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Baxi Boiler fault & error codes

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