But, the E40 fault code is specific. These thermistors monitor the temperature of water, to and from the boiler. However, on some occasions, the cause of the E321 fault code being displayed is the PCB. After all, this is what circulates water from the boiler. 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. 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 you’re having a problem with your Potterton boiler, it will be listed in this guide. There are hundreds of models and many variations; it is important, therefore, to understand combi boilers collectively. A Gas Safe boiler engineer will be able to narrow down the problem, by checking gas supply to other gas appliances. 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. Your boiler engineer will be able to test this using a multi-meter. Is there a switch on the boiler to turn on/off RF singal or could this be a battery issue? So, the boiler is likely to lock out, before displaying the fault code. You’ll need to call a Gas Safe repair engineer. 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. It will also show a static cause code. Boiler Fault finding logic. The E163 fault code isn’t one that can be fixed on a DIY basis. It’s the thermistor on the return side (water coming back to the boiler via pipework to be re-heated) causing the problem. use fault logic, use safe working practices, use instruments to test signals/ components, prove the fault, and avoid wrong conclusions. So, it might not be reading the readings from the thermistor correctly. The offending parts will need to be replaced. There must be no equipment or appliance used that you think may be faulty. Like all mechanical parts in your boiler, the fan can fail over time. That’s useful information for your boiler service engineer. 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. These are extremely important to the engineer and it is vital to always follow the manufacturer's instructions. On some occasions, it’s not a physical overheat that’s causing the E110 fault code to be displayed. 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. When they notice a temperature differential between the two sensors that is too high or low, they’ll lock out the boiler and display a fault code. This could be due to old age, faulty wiring, or water damage. But, it’s important not to start replacing parts until every possibility has been ruled out. The gas valve is an electronic component, controlled by the PCB. And, a steady flow of gas needs to be provided to the burner. 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. It is either failing in its heating role or failing in its hot water role or both. Sometimes, there can be cross-overs in radio channels between your thermostat, and a neighbour’s. 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. This 3 day course is designed for those who want to improve their knowledge, develop their skills and learn best practice when fault finding and repairing a gas boiler. Test the electrical circuits by checking for short circuits, continuity (earth) and resistance (to earth). This frequent flame failure is potentially dangerous. However, if the gas valve is excessively worn, it makes sense to replace it. If this is the case, the sensor is going to need to be replaced. If the PCB is faulty, the signals it gives and receives are going to be wrong. Typically, a boiler PCB replacement is going to cost in the region of £500. single speed, two speed, three speed, modulating, twin pump, and five or six metre head. If you know the fault code being displayed on your boiler, you can click the link and read the details on that specific fault code below. For more boiler issues regarding any other type of Boiler then please visit the Boiler Problems And Cures page. Instead, they can isolate the problem to boiler. It is either failing in its heating role or failing in its hot water role or both. If it’s the PCB that is faulty, a replacement will be needed. The boiler can then be reset to clear the E160 fault code. Locking Error: The boiler will flash a warning triangle and a fault code. If this is a brand-new timer, your boiler repair engineer will need to check the compatibility of the thermostat. The valve might be shut, and the flame might not even exist. You’ll need to press the boiler reset button to clear the code, but only after the boiler has been fixed. If your boiler is losing pressure, it’s likely you have a leak. That means your boiler engineer is going to be focused on wiring and connections to/from the valve. Your boiler needs to communicate with the thermostat, to know when you have higher/lower demand for heating. If your boiler keeps failing to ignite, it’s likely to show the E128 fault code. The quicker the issue is found and repaired, the more likely it is that a quick and cheap fix is available. The fact that it’s just the NTC thermistor on the return side, helps to narrow down the problem quickly. If it is the thermostat that’s tripping, then it’s going to need to be replaced. Many components are ‘fit and forget' and require no servicing, although it is always good intuitive to check for imminent component failure whenever it is possible. 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. If it is, they’ll attempt to free the valve. This can cause you to control their boiler, and vice-versa. If the burner isn’t blocked, your boiler repair company will move onto the gas valve. These jets are incredibly delicate, so a tiny spec of debris, could be enough to limit the supply of gas. However, they’ll need to be 100% confident that the operation of the gas valve is smooth, so this won’t happen again. When fault finding in a combi boiler, use a logical and personal approach which includes collecting evidence, analysing evidence, locating the fault, establishing the cause of the fault, repairing the fault, and checking the system. The root of the problem comes from the boiler overheating. Typically, the biggest cause of the E270, is a leak in the heating system. In this case, the PCB needs to be tested. DAY 1 – FAULT FINDING. In some cases, we’ve found the problem is electrical, but other contributing factors aren’t helping. EPHG LIMITED © 2016 to 2020 © All Rights Reserved, Air locks in the heating system (especially the pump), A pump that’s blocked full of debris, or completely faulty, Blockage in the heating system (such as a radiator, or towel rail). Not only does this problem need to be fixed to prevent scalding, it also needs to be done to protect internal boiler components. Some common overheat fault codes include D1 286, E5 218, E5 332, E9 219 and E9 224. Typically, the cost including parts and labour is going to be in the region of £300. check the meter isn’t blocked or frozen). These are mechanical parts, and mechanical parts wear out over time. 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. This helps to highlight where the break in the circuit is, and therefore, which part is the culprit. 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. A logical approach is required to quickly track down, isolate, and repair the fault. 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. It’s the fan that keeps your boiler operating safely. As well as if the boiler runs and then stops and also if it makes a noise. Establish if the fault is constant or infrequent and whether it affects the hot water, the central heating, or both. 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. If it’s the burner, it’s usually a case of a small amount of debris build-up in the jet. On Potterton boilers, the E384 fault is a false flame. The problem is that the combi boiler is failing in its comfort role. This is a simple DIY fix, but it’s still wise to call an engineer. Your boiler repair specialist will also need to analyse the components in your boiler such as the thermistors and PCB. Just below, we have a list of common codes related to the Poterton Boiler. 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. Boiler Fault-finding & Service and parts replacement courses. Your boiler has an air pressure switch. This guide is meant for informational purposes only, you should never attempt to fix an issue within your boiler if you aren’t a Gas Safe registered engineer. Fortunately, all components carry out obvious actions and in most instances will share basic functions with its counterpart in other combi boilers. Leaks can come from all sorts of places, including: Technically, topping up your boiler’s pressure and resetting it, would work as a temporary fix. Finally, they’ll want to check the radio frequency you’re running, if you have an RF stat. Typically, this is to preserve internal boiler components. 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. This could lead to a gas valve replacement, that can cost £250-300, depending on the exact type of Potterton boiler that you own. However, that’s going to mean that the leak hasn’t been fixed. The E321 fault code on your Potterton boiler, means that there’s a fault with the NTC thermistor. 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. And, all mechanical components can wear over time. They’ll be able to tell exactly which one is at fault, by testing all NTC thermistors on the boiler using a multi-meter. Suprima by Potterton, 30-80 and 30L-80L (but NOT Suprima HE). Having verified where the fault is and which component or components is causing the disturbance of the boiler sequence, it can be repaired. But, there are other common reasons that the E125 is displayed. Common fault 4: Strange banging noises. Your boiler needs a clear airway to operate correctly. Typically, this is a gas supply issue. The Fix: Call a Worcester Bosch service engineer or an accredited engineer, who will … In most cases, it’s wires and connections that are the culprits. For a quick and easy check conduct the following: Electrical. Fortunately, all components share basic functions, which should know. The different types of central heating system probably have a greater noticeable impact of the hot water in your home, but the central heating system and boiler is inextricably linked. Like the E129 fault code, the problem usually stems from the burner, or from the gas valve. If you are having any difficulty getting yours fixed or have been told parts are hard to get, give me a call or send me a text on 07866 766364 for a chat about it.. Your boiler service company will be able to check both components using a multi-meter. Fault Finding & Multimeters Course. When the E09 fault code is displayed, it means that the connection is weak, intermittent, or non-existent. However, water damage is a different story. The problem can be fixed by flushing out the system using chemicals, and then fitting a magnetic system filter. All repairs on Combi boilers require a methodical approach and have a logical and efficient method of diagnosing combi boiler faults. This leak could cause further damage. 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. All mechanical and electrical appliances eventually breakdown and need to be repaired or replaced, central heating boilers and combination boilers are no different. Common Fault 5: Baxi 105e combi boiler – no hot water. heatandplumb.com supplies over 90,000 heating and plumbing products to the trade and public at highly-competitive online prices. When they’re not, the fan isn’t able to push harmful gases out of the flue. To make recognising a fault as straightforward as possible, modern boilers display a digital boiler error code to let you know exactly what’s causing the fault. 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 should be closed, but the PCB is still detecting a flame. The fault code displayed will indicate the specific type of fault as listed in the manufacturer's instructions. 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 … The most obvious explanation for this, is that the gas valve is faulty. Check that the system has correct polarity. That means they can discount problems such as the meter, and gas pipework to the boiler. Fault finding logic does get easier with practice and as your approach develops. 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. It’s common for the wiring and connections between the gas valve and the PCB to be interrupted, so they won’t function in harmony. If the boiler goes above 3 bar, or below 0.5 bar, it will lock out. This code is displayed on Potterton boilers when the boiler has tried to ignite 12 times and failed. A replacement could cost £450-500 to install, not to mention the other components that the water damages. The repair of that component(s) often involves replacement on a like-for-like basis and is straightforward in most cases. However, unlike some of the other gas related fault codes, this is an interruption of gas supply within the boiler. The E384 fault code can be fixed by first, determining the exact cause of the problem. The gas valve could be giving or receiving the wrong signals, or even sticking partially open/closed when it shouldn’t be. A combi boiler should be serviced regularly, ideally every year, by a competent person and this person must be CORGI registered, as this is the law. But, it’s not always the ignition lead and probe that are to blame. When the fault is established and found it can then be easily repaired. When Potterton boilers display the E83 fault code, there’s a problem with room thermostat or timer. use professional tools, use quality parts from a reputable wholesaler, avoid damage to other components, and use a pipe freezing machine if drain down is necessary. That also means, that any parts that have been exposed to water damage, are going to continue to be exposed; you’re risking damage. Some combi boilers have a built-in diagnostic system that illuminates LEDs or neon's, either on the control board or the user panel. Even though they are very reliable, one day they will break down. The gas valve should be closed, but the PCB is still detecting a flame. And, if it’s the NTC thermistor, these are not particularly expensive. Skills Training Group’s boiler fault-finding & breakdown course is designed for heating engineers, who have little or no knowledge of boiler fault finding techniques and want to improve or enhance their skills and practice in a comfortable and welcoming environment. That’s going to cause a gas supply issue that could be dangerous. For instance, the ST620WBC from Salus, is designed specifically for Worcester boilers, and not any other brands. 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. For instance, if the heat exchanger is overheating, it could weaken and crack. They can stick open or closed, but in this case, the valve may be stuck partially open. E110 fault code on Potterton boilers, the E129 fault code being.... 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