Having a boiler or electrical engineer switch the radio frequency channel of the thermostat will fix the problem. Working backwards, your boiler engineer will need to check the gas supply into the burner (i.e. 0. The E163 fault code isn’t one that can be fixed on a DIY basis. test all external and internal time and temperature controls, and observe firing and shutting down sequence in both central heating and domestic hot water modes. Like most boilers from the 90s and 2000s, the Potterton Suprima is easily repaired should it suffer a breakdown. This could be due to old age, faulty wiring, or water damage. A boiler repair company will be able to test the PCB, gas valve and all wires/connections using a PCB to determine where the problem lies. The quicker the issue is found and repaired, the more likely it is that a quick and cheap fix is available. In this case, the PCB needs to be tested. The most obvious explanation for this, is that the gas valve is faulty. If it is, they’ll attempt to free the valve. It’s likely these are the culprits. Boiler Fault Finder is an easy to navigate, technical support workmate, providing many features such as fault finding & diagnosis, boiler manuals, electrical safety checks, system component testing and sequence of boiler operation. Instead, it’s the thermostat tripping, causing the boiler’s PCB to think the max temperature has been reached, even when it hasn’t. Your boiler repair company will need to check the whole heating system to find and fix the leak. Common fault 4: Strange banging noises. However, on some occasions, parts like the PCB and/or gas valve will need to be replaced. Do this by: talk to the house owner, attend manufacturers' training courses, read the manufacturers' installation and servicing instructions, talk to colleagues and component wholesaler staff, and keep a written record of combi boilers worked on, the fault, repair, cost of component(s) of the boiler, and time taken. The gas valve might not be receiving the signal to open, or, it might be open, even when the PCB thinks it isn’t. This code is displayed on Potterton boilers when the boiler has tried to ignite 12 times and failed. no electrical supply to burner Check for 230 V at boiler terminal block. Typically, the cost including parts and labour is going to be in the region of £300. For instance, there could be a problem with the PCB. In many cases, there may not be a problem with the boiler itself but a problem with the supply. Ensure system has appropriate electrical polarity. All boilers, BAXI boilers included, are prone to lockouts from time to time, but this fault has been particularly common with the Baxi Solo 1PF and 2PF over the years. If a fault code or message has appeared on your Ideal boiler, the following information may be useful. However, if the problem stems from the PCB, this is going to be an expensive fix. If the fault lies with the thermistor, it’s likely the problem stems from a short circuit, faulty NTC thermistor, or the connections between the PCB and thermistor aren’t secure (or, possibly damaged). If the fan isn’t working correctly, the boiler will lock out. Fault Error: The boiler will display an alphanumeric fault code to indicate the fault group. Locking Error: The boiler will flash a warning triangle and a fault code. On most occasions, this is a quick and simple fix; usually, a replacement NTC thermistor is needed. Typically, we find it’s years of boiler vibrations working these connections loose, or a small level of water damage. Your boiler needs a clear airway to operate correctly. The huge number of combi boilers available means there are millions of variations of components and it is impossible to specifically describe each one. diaphragm, paddle diaphragm, reed or thermistor. If your boiler is losing pressure, it’s likely you have a leak. Typically, the biggest cause of the E270, is a leak in the heating system. It will also show a static cause code. But, it’s important not to start replacing parts until every possibility has been ruled out. This is a primary circulation fault. Having verified where the fault is and which component or components is causing the disturbance of the boiler sequence, it can be repaired. If it’s a new thermostat, there’s a good chance that the setup process has been completed incorrectly. The E135 Potterton fault code is another that’s related to the supply of gas. Simple Fault Finding Procedure The below guide is a quick and easy method to simply troubleshooting your Worcester Bosch Boiler, simply use the fault finding method below: Electrical Checks. All these airways need to be clear. It’s these thermistors that monitor the flow and return temperature of the water in your heating system, as well as water supplying taps and showers. The PCB has determined that there’s a false flame, but that might be the case. The gas valve should be closed, but the PCB is still detecting a flame. Fault finding on combination boilers is about solving the problem. But I can't find steps to solve this (I tried to restart the thermostat). In fact, the fan is so important, that the boiler won’t fire up until it gets a signal to say that the fan is operating. Your boiler repair specialist will also need to analyse the components in your boiler such as the thermistors and PCB. Typically, a boiler servicing and repair company is going to start by checking all airways are clear. It’s the fan that keeps your boiler operating safely. You should expect to pay somewhere in the region of £250 (the price will vary, depending on the exact boiler model you have). These thermistors monitor the temperature of water, to and from the boiler. If there’s a problem with the PCB, or with wiring and connections to/from it, the signals could be misleading. Expect a replacement PCB on a Potterton boiler to be in the region of £500. The E384 fault code can be fixed by first, determining the exact cause of the problem. But, the E129 fault code on Potterton boilers isn’t just limited to airway blockages. heatandplumb.com supplies over 90,000 heating and plumbing products to the trade and public at highly-competitive online prices. So, the boiler does have the ability to ignite, but something is stopping the flame from being maintained. The idea behind these sensors, is to ensure that water isn’t too hot, or too cold. A Gas Safe boiler engineer will be able to narrow down the problem, by checking gas supply to other gas appliances. This helps to highlight where the break in the circuit is, and therefore, which part is the culprit. And, like the above, it’s likely that the gas valve is stuck closed. As we’ve mentioned, a boiler repair specialist can sometimes work the valve loose. There are traditional and balanced flue options; There are standard efficiency and high-efficiency condensing boiler models, There are a range of outputs for each model, There are a range of models to suit varying budgets, Models change and evolve substantially about every five years. This includes checking the pump and heating system for air locks, as well as ensuring the central heating sludge isn’t an issue. However, if your gas valve is beyond repair, you’ll need a replacement. Typically, a boiler PCB replacement is going to cost in the region of £500. Unfortunately, they’re not cheap components to replace. The code is generated by the boiler’s printed circuit board(PCB). Many leading manufacturers offer courses on the installation, service, fault finding, and repair of their combi boilers. Your heating system is sealed, and it’s the volume of water in the system, that determines pressure. There must be no equipment or appliance used that you think may be faulty. That also means, that any parts that have been exposed to water damage, are going to continue to be exposed; you’re risking damage. Boiler Manufacturers' instructions give detailed service procedures but most servicing can be carried out with a good comprehensive knowledge of that type of combi boiler. That’s not just at the point of delivery (for example, radiators or taps) to prevent scalding, but also to ensure all parts in the boiler are operational. If there’s an issue with gas supply from the meter, to the boiler, or in the boiler (the gas valve), this is going to stop the boiler from establishing a flame. These are mechanical parts, and mechanical parts wear out over time. There’s a good chance that they’ve been damaged. 3737. If it is the thermostat that’s tripping, then it’s going to need to be replaced. All these components need to be checked unless it is established that the boiler fires in domestic hot water mode but not in central heating mode. If the PCB is faulty, the signals it gives and receives are going to be wrong. It is important to understand which kind of system that you have before you start any type of fault finding or maintenance. This allows the boiler’s PCB to monitor the appliance’s operation. They’ll be able to tell exactly which one is at fault, by testing all NTC thermistors on the boiler using a multi-meter. Typically, the E321 stems from an electrical fault. There’s not a DIY fix for the E09 fault code. Your boiler needs to communicate with the thermostat, to know when you have higher/lower demand for heating. Central heating sludge can block up important components, reduce circulation, and cause overheats. If they are faulty, they will need to be replaced by a Gas Safe boiler repair engineer. The issue that’s causing the fault code to be displayed, is low water pressure. check the meter isn’t blocked or frozen). Below we have listed the main Ideal boilers in domestic use so that you can find your model, find your fault code and then see what the issue is and how it can be fixed. Is there a switch on the boiler to turn on/off RF singal or could this be a battery issue? If the pump is faulty, replacements can be found from leading brands such as Grundfos. THE Boiler Fault Finder “Boiler Fault Finder is aimed at Professional Heating Engineers and results from from years of experience as a professional service and repair engineer, demonstrating technical expertise within the industry – the GOTO to fix Boiler Faults“ Identify the Problem, Find … If necessary, contact the manufacturer using the technical advice lines for specialist advice. This reduces the pressure in the boiler to a point where it can’t operate. If it’s the burner, it’s usually a case of a small amount of debris build-up in the jet. The most obvious explanation for this, is that the gas valve is faulty. There are hundreds of models and many variations; it is important, therefore, to understand combi boilers collectively. When the boiler isn’t working within tolerances and the PCB recognises that there’s a fault, it’s going to display a fault code on the display panel. If the boiler continues to lose pressure and the E270 fault code is displayed again, it’s likely that the problem is with the pressure release valve or expansion vessel. The pump will be working too hard to circulate water and could burn out. You’ll need to press the boiler reset button to clear the code, but only after the boiler has been fixed. single speed, two speed, three speed, modulating, twin pump, and five or six metre head. It’s rarely worth while fixing them, so a replacement is going to be needed. Valves are known for sticking. Typically, this is a gas supply issue. These are extremely important to the engineer and it is vital to always follow the manufacturer's instructions. If the boiler’s flame sensor shows no flame, the boiler will shut off. This is a simple DIY fix, but it’s still wise to call an engineer. Some combi boilers have a built-in diagnostic system that illuminates LEDs or neon's, either on the control board or the user panel. If it’s the PCB that is faulty, a replacement will be needed. As well as if the boiler runs and then stops and also if it makes a noise. The app greatly simplifies current repair execution techniques by eliminating time consuming and inconvenient phone calls to … The gas valve is an electrical, but also mechanical component. Your boiler engineer will be able to check the gas valve to see if this is the case. The fix here is simple; top up the water pressure by using the external filling loop. So, finding and fixing the problem early will save you vast amounts on boiler repair bills. That means your boiler engineer is going to be focused on wiring and connections to/from the valve. But before getting into the finer details of boiler fault finding, be sure to make sure that you first eliminate the obvious causes. This can cause you to control their boiler, and vice-versa. By. Making Boiler Fault Finding Easier. However, if the overheat is genuine, your boiler engineer is going to need to focus on anything that affects the circulation of water. For example, if the fan is running but there is no ignition, the fault is at or after the fan but before the boiler firing. After all, this is what circulates water from the boiler. For instance, if a gas hob, cooker or fire still works, the problem isn’t the gas meter. Basic Fault Finding Procedure When troubleshooting your Biasi Combi or System boiler please follow the following safety checks need to be done: - Gas Supply: verify basic boiler gas supply, check if it is clean and gas has a free passage. If your boiler is showing the E270 fault code, that means there’s not enough water in the system. The Cause: If you hear a strange banging noise when your boiler fires up, this is usually a problem with the gas valve communicating with the fan speed. The offending parts will need to be replaced. Cleaning out the jet on the burner, as well as any debris close by, will fix the problem. This leak could cause further damage. They can stick open or closed, but in this case, the valve may be stuck partially open. You’ll need to call a Gas Safe repair engineer. On some occasions, this is a simple case of a fan speed that is too low. If this is a brand-new timer, your boiler repair engineer will need to check the compatibility of the thermostat. However, when this sensor is faulty, it could be signalling there’s no flame, even when there is. The most probable cause here, is the gas valve. They’ll be able to find and fix the fault. There’s a good chance that old-age has set in, and there’s a problem somewhere in the circuit providing the thermostat with power. Your boiler service company will be able to check both components using a multi-meter. Just below, we have a list of common codes related to the Poterton Boiler. If your boiler keeps failing to ignite, it’s likely to show the E128 fault code. Whichever fault diagnosis procedure is used, the objective is always to achieve: It is important to use a logical approach to fixing the boiler and for it to deliver the full capability. In the case of the E133 fault code, it’s likely that the gas valve is stuck closed, even when the PCB is telling it to open. Instead, they can isolate the problem to boiler. Typically, anything that affects the circulation of water is going to be something your heating repair engineer needs to look at. After your boiler engineer has found the problem causing the lock out, they’ll be able to reset the boiler and the fault code will be cleared from the display panel. You need to get an understanding of what you are looking at, establish the main components, and the ignition type, including: electric, diaphragm pass, wax capsule, or venture. Potterton Suprima Gas Boiler Faults, Problems and Fault Finding. The E321 fault code on your Potterton boiler, means that there’s a fault with the NTC thermistor. However, on some occasions, the damage is much more serious. They’ll be checking for things such as the pump being seized, air locks, and even electrical power. And, all mechanical components can wear over time. It will be a fault with the fan speed, flue airways, air pressure hose(s), thermistor(s), air pressure switch or its connections, printed circuit board, gas valve, ignition components, or condensate pump. With the huge number of combi boilers installed (about 10 million in the UK) and the variations that can occur, major or minor, it is impossible to specifically describe each and every component for all the different boilers. The fault code displayed will indicate the specific type of fault as listed in the manufacturer's instructions. So, instead of working, the boiler will lock out, as a self-preservation technique. However, that’s going to mean that the leak hasn’t been fixed. Your boiler repair company will be able to determine which of these is the case, by testing the fan with a multi-meter. Able Skills Boiler Fault Finding & Heating Controls Course is suitable for Gas Safe registered engineers, or those who have undertaken Able Skills Gas Managed Learning Programme.This course is aimed at those individuals who are looking to enhance their practical skills with additional technical knowledge on boiler maintenance, fault finding and repair. Your boiler engineer will be able to test this using a multi-meter. The gas valve should be closed, but the PCB is still detecting a flame. Like all mechanical parts in your boiler, the fan can fail over time. A fluctuation in temperature via the NTC thermistors could indicate a problem, and the boiler locks out. But, it’s not always the ignition lead and probe that are to blame. © HeatandPlumb.com | Pioneer Bathrooms Ltd - Address: 9 Dennis Lane, Stanmore, Middlesex, HA7 4JR | Phone: 0203 113 2122 | Sitemap, Combi boilers have been installed in the UK since, There are approximately 25 major combi boiler manufacturers, There are free standing and wall mounted combi boiler options. If your Baxi 105e combi boiler is failing to provide you with hot water, or the water is only heating up when the central heating is turned on, it could be a problem with your diaphragm washer. use knowledge of the components installed, knowledge of operating principles, and knowledge of firing sequence. Instead of attempting DIY fixes, speak to a boiler repair company instead. Check that the system has correct polarity. It is important to have adequate understanding to enable recognition of each component, how it works and how it relates to the other components within a combi boiler. You can release water, and therefore pressure, from the drain cock, or from the bleed valves on radiators. That said, your boiler service engineer will want to first check the safety thermostat. Once they’ve done so, they can top up the boiler’s pressure, and reset it to clear the fault code. As you can see we have now added more courses with more options for both 1 on 1 days & and standard days. The fact that it’s just the NTC thermistor on the return side, helps to narrow down the problem quickly. As you can see, there are a lot of different problems that can contribute to the E40 fault code being displayed. Share on Facebook. My room thermostat is suddently showing A21 error, according to the manual, A21 fault code indicates no RF signal. Establish if the fault is constant or infrequent and whether it affects the hot water, the central heating, or both. And, a steady flow of gas needs to be provided to the burner. The first place to start is the burner. Fault finding on combination boilers is about solving the problem. So, don’t top up your boiler, until the leak has been fixed by a qualified engineer. DAY 1 – FAULT FINDING. However, they’ll need to be 100% confident that the operation of the gas valve is smooth, so this won’t happen again. Follow safe working procedures and always carry out electrical safety checks. Like the E129 fault code, the problem usually stems from the burner, or from the gas valve. If the supply of gas isn’t the problem, it could be a sensing fault. Common Fault 5: Baxi 105e combi boiler – no hot water. To avoid expensive long-term repair bills, it makes sense to get an engineer to find and fix any leaks, to stop this (and more problems) happening again. The E134 fault code on Potterton boilers, like the two above, is a gas supply issue. The E20 fault code on Potterton boilers, relates to an NTC thermistor issue in your appliance. The thermistors monitor the temperature of water. Many attempts have been made to ease this part of the job for the professional, and the latest boiler fault finding apps could be of some use. It is either failing in its heating role or failing in its hot water role or both. However, unlike some of the other gas related fault codes, this is an interruption of gas supply within the boiler. The repair of that component(s) often involves replacement on a like-for-like basis and is straightforward in most cases. These jets are incredibly delicate, so a tiny spec of debris, could be enough to limit the supply of gas. However, this is a fault that’s directly related to the gas valve. Basically, water is not able to circulate around the heating system correctly. In most cases, it’s wires and connections that are the culprits. Your boiler engineer will start by checking that the ignition lead and probe are in good condition. And, if you have a leak, it could be damaging your property (for instance, pipework beneath floorboards, leaking over plaster), or your boiler (for instance, the heat exchanger is leaking onto electrical components). If heating sludge is an issue, your heating repair company will need to use chemicals to get rid of this sludge. When your boiler develops a fault, a code will be shown on the display panel. For example, a small connection could have come loose, and re-securing that connection is going to fix the problem. Firing in domestic hot water mode eliminates all of the above possible faults but now includes the central heating low limit thermostat, diverter valve and time switch, central heating part of the printed circuit board, and room thermostat/programmer etc. If your boiler’s water temperature is too high, that’s a sign of an internal problem. Boiler Fault finding logic. Finally, they’ll want to check the radio frequency you’re running, if you have an RF stat. A replacement could cost £450-500 to install, not to mention the other components that the water damages. These are the top 10 most common boiler problems: Common Boiler Problems: Hot water but no heating; No heat or hot water; Boiler is leaking; Boiler is kettling It’s the PCB that gives the signal to the valve to open, and receives a signal back from the gas valve, to say that is has opened. The smallest bit of carbon build-up in the jet, will be enough to limit the flow of gas to a point where the flame can’t stay established. With gas valves, they tend to stick. On some occasions, it’s not a physical overheat that’s causing the E110 fault code to be displayed. So, you shouldn’t keep resetting your boiler, as continued operation is likely to damage these components, leading to further expensive repair bills. That’s letting gas into the burner, even when it shouldn’t be. On Potterton boilers, the E384 fault is a false flame. 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