The pump will be working too hard to circulate water and could burn out. If you accidentally top up water pressure to above 1.5 bar, it can be released. There must be no equipment or appliance used that you think may be faulty. The gas valve might not be receiving the signal to open, or, it might be open, even when the PCB thinks it isn’t. The Fix: Call a Worcester Bosch service engineer or an accredited engineer, who will … However, if the problem stems from the PCB, this is going to be an expensive fix. Typically, a boiler PCB replacement is going to cost in the region of £500. In this case, the PCB needs to be tested. Accompanying these hands-on courses are the manufacturer's installation, service, repair, and fault finding instructions. 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. 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). Finally, they’ll want to check the radio frequency you’re running, if you have an RF stat. If this is a brand-new timer, your boiler repair engineer will need to check the compatibility of the thermostat. By. Whichever fault diagnosis procedure is used, the objective is always to achieve: Permanent pilot, intermittent pilot, fully automatic, or zero governor. When your boiler displays the E09 fault code, it means there is a problem with the gas valve’s connection to the boiler. pressure differential, diaphragm or reed. ... Hissing or Banging From Boiler or Heating Pipes. DAY 1 – FAULT FINDING. So, don’t top up your boiler, until the leak has been fixed by a qualified engineer. Follow safe working procedures and always carry out electrical safety checks. If your boiler keeps failing to ignite, it’s likely to show the E128 fault code. In freezing conditions, it’s likely that the condensate has frozen. And, a steady flow of gas needs to be provided to the burner. It’s the thermistor on the return side (water coming back to the boiler via pipework to be re-heated) causing the problem. 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 E133 fault code on Potterton boilers is a common one. The most probable cause here, is the gas valve. They can stick open or closed, but in this case, the valve may be stuck partially open. Is there a switch on the boiler to turn on/off RF singal or could this be a battery issue? 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. That means they can discount problems such as the meter, and gas pipework to the boiler. There’s a good chance that they’ve been damaged. You’ll need to call a Gas Safe repair engineer. If they don’t fix the leak causing water damage, this is likely to happen again, not to mention the fact that other parts could get damaged too. Typically, the biggest cause of the E270, is a leak in the heating system. These thermistors monitor the temperature of water, to and from the boiler. If this is the case, the sensor is going to need to be replaced. Cleaning out the jet on the burner, as well as any debris close by, will fix the problem. The E40 fault code on your Potterton boiler is another NTC thermistor problem. A typical gas valve replacement is likely to be in the region of £300. Sometimes, gas valves can be freed. Fortunately, all components carry out obvious actions and in most instances will share basic functions with its counterpart in other combi boilers. However, water damage is a different story. On some occasions, it’s not a physical overheat that’s causing the E110 fault code to be displayed. So, if the switch is faulty, it’s going to be feeding back the wrong signals to the PCB and lock out the boiler. The most obvious explanation for this, is that the gas valve is faulty. Fault Finding & Multimeters Course. You’ll need to press the boiler reset button to clear the code, but only after the boiler has been fixed. 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.. Potterton state that this fault code occurs when a boiler requests the gas valve to open, but no gas is detected. On some occasions, this is a simple case of a fan speed that is too low. The problem is that the combi boiler is failing in its comfort role. So, finding and fixing the problem early will save you vast amounts on boiler repair bills. 0. Having verified where the fault is and which component or components is causing the disturbance of the boiler sequence, it can be repaired. Remember, working on a gas boiler, is a job for Gas Safe qualified repair engineers. So, instead of working, the boiler will lock out, as a self-preservation technique. They’ll then fit a boiler filter, to stop sludge build-up happening in the future. All these airways need to be clear. Your boiler repair company will be able to determine which of these is the case, by testing the fan with a multi-meter. 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. The huge number of combi boilers available means there are millions of variations of components and it is impossible to specifically describe each one. 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. check the meter isn’t blocked or frozen). Like the E129 fault code, the problem usually stems from the burner, or from the gas valve. Central heating sludge can block up important components, reduce circulation, and cause overheats. Typically, this is to preserve internal boiler components. 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 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. When Potterton boilers display the E83 fault code, there’s a problem with room thermostat or timer. Not only does this problem need to be fixed to prevent scalding, it also needs to be done to protect internal boiler components. Typically, you’d expect to see a boiler’s pressure to be at 1.3-1.5 bar; that’s optimum working condition for most boilers. Fault Error: The boiler will display an alphanumeric fault code to indicate the fault group. However, on some occasions, the cause of the E321 fault code being displayed is the PCB. The Boiler Fault FInding Solution; 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. Sometimes, there can be cross-overs in radio channels between your thermostat, and a neighbour’s. 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 boiler locks out to protect you, and anyone else in the property. 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. When a Potterton boiler shows the E110 fault code, it means the maximum temperature gradient has been reached; something is causing your boiler to overheat. Some common overheat fault codes include D1 286, E5 218, E5 332, E9 219 and E9 224. Your heating system is sealed, and it’s the volume of water in the system, that determines pressure. The valve might be shut, and the flame might not even exist. For a quick and easy check conduct the following: Electrical. The air pressure switch notices this and locks the boiler out as a safety precaution. You can release water, and therefore pressure, from the drain cock, or from the bleed valves on radiators. Then they have to be fixed and a logical approach to fault finding and repair is essential. 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. Your boiler engineer will start by checking that the ignition lead and probe are in good condition. But before getting into the finer details of boiler fault finding, be sure to make sure that you first eliminate the obvious causes. 0 Servicing or fault finding on a combi boiler is about learning about many different types of boiler and realising they are all slightly different. However, they’ll need to be 100% confident that the operation of the gas valve is smooth, so this won’t happen again. This is a simple DIY fix, but it’s still wise to call an engineer. 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). A Gas Safe boiler engineer will be able to narrow down the problem, by checking gas supply to other gas appliances. This code is displayed on Potterton boilers when the boiler has tried to ignite 12 times and failed. That’s going to mean that the NTC thermistor has a short circuit or is faulty. Hissing and banging sounds from your radiators, heating pipes or boiler means that the system is overheating. The Fault Finding & Multimeters Course is designed for installers who want to improve fault finding, servicing and repairs for their customers, or maybe change from installing and move into breakdowns which will make more money. Fault finding on combination boilers is about solving the problem. This could lead to a gas valve replacement, that can cost £250-300, depending on the exact type of Potterton boiler that you own. 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. The app greatly simplifies current repair execution techniques by eliminating time consuming and inconvenient phone calls to … It’s rarely worth while fixing them, so a replacement is going to be needed. 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. 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. It will also show a static cause code. If the boiler goes above 3 bar, or below 0.5 bar, it will lock out. Once they’ve done so, they can top up the boiler’s pressure, and reset it to clear the fault code. 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. In many cases, there may not be a problem with the boiler itself but a problem with the supply. For instance, if a gas hob, cooker or fire still works, the problem isn’t the gas meter. Common fault 4: Strange banging noises. Your boiler engineer will be able to test this using a multi-meter. The E20 fault code on Potterton boilers, relates to an NTC thermistor issue in your appliance. This includes checking the pump and heating system for air locks, as well as ensuring the central heating sludge isn’t an issue. use fault logic, use safe working practices, use instruments to test signals/ components, prove the fault, and avoid wrong conclusions. There could be a problem with the supply of gas. When the E15 fault code is displayed on your boiler, it’s another gas related fault. Table A - boiler start and burner related fault finding table for all Grant Vortex oil fired boilers Fault Cause Action Boiler will not start Low pressure cut-out activate Refill system to 0.5 - 1.0 bar. However, if the gas valve is excessively worn, it makes sense to replace it. On most occasions, this is a quick and simple fix; usually, a replacement NTC thermistor is needed. 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. They’ll then reset the boiler on your behalf when they’ve fixed the fault. 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. Gas Boiler Fault Finding and Repair - Level 1-3. There are hundreds of models and many variations; it is important, therefore, to understand combi boilers collectively. check the gas valve isn’t sticking closed), and the supply of gas into the boiler (i.e. The fault code displayed will indicate the specific type of fault as listed in the manufacturer's instructions. When they’re not, the fan isn’t able to push harmful gases out of the flue. Even though they are very reliable, one day they will break down. Potterton Suprima Gas Boiler Faults, Problems and Fault Finding. The E135 Potterton fault code is another that’s related to the supply of gas. For instance, if the heat exchanger is overheating, it could weaken and crack. On many occasions, this means that a replacement isn’t needed. And, all mechanical components can wear over time. Making Boiler Fault Finding Easier. It is either failing in its heating role or failing in its hot water role or both. These are extremely important to the engineer and it is vital to always follow the manufacturer's instructions. Ensure system has appropriate electrical polarity. Share on Facebook. If you’ve got a Worcester boiler that’s overheating it could be caused by things such as a faulty fan, pump, blocked PRV or even a condensate blockage. The issue that’s causing the fault code to be displayed, is low water pressure. 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. Follow safe working procedures and carry out electrical safety checks every time. You should expect to pay somewhere in the region of £250 (the price will vary, depending on the exact boiler model you have). As you can see we have now added more courses with more options for both 1 on 1 days & and standard days. Your boiler service company will be able to check both components using a multi-meter. The problem is that the combi boiler is failing in its comfort role. This is a primary circulation fault. But, it’s important not to start replacing parts until every possibility has been ruled out. These jets are incredibly delicate, so a tiny spec of debris, could be enough to limit the supply of gas. If the boiler’s flame sensor shows no flame, the boiler will shut off. Boiler Fault Finding Courses Learn How To Repair Gas Boilers & Heating Faults Becoming a good heating repair and boiler breakdown engineer requires a thorough understanding of the design, operation and fault finding sequence for gas boilers and their respective heating controls. 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. And, if it’s the NTC thermistor, these are not particularly expensive. Boiler Fault-finding & Service and parts replacement courses. This frequent flame failure is potentially dangerous. If your boiler’s water temperature is too high, that’s a sign of an internal problem. If it’s the PCB that is faulty, a replacement will be needed. But I can't find steps to solve this (I tried to restart the thermostat). 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. Typically, the cost including parts and labour is going to be in the region of £300. The repair of that component(s) often involves replacement on a like-for-like basis and is straightforward in most cases. With gas valves, they tend to stick. When your boiler develops a fault, a code will be shown on the display panel. After all, this is what circulates water from the boiler. It is important to understand which kind of system that you have before you start any type of fault finding or maintenance. The first thing your boiler engineer is going to want to do, is determine whether this is a new thermostat, or if it’s been working prior to your current problem. If they are faulty, they will need to be replaced by a Gas Safe boiler repair engineer. That’s letting gas into the burner, even when it shouldn’t be. Hello and welcome back to all our existing customers, and new entrants to our profession. Instead, they can isolate the problem to boiler. But, the E129 fault code on Potterton boilers isn’t just limited to airway blockages. 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. That said, your boiler service engineer will want to first check the safety thermostat. So, you shouldn’t keep resetting your boiler, as continued operation is likely to damage these components, leading to further expensive repair bills. The PCB has determined that there’s a false flame, but that might be the case. The problem can be fixed by flushing out the system using chemicals, and then fitting a magnetic system filter. The most obvious explanation for this, is that the gas valve is faulty. The gas valve is an electrical, but also mechanical component. The gas valve should be closed, but the PCB is still detecting a flame. That also means, that any parts that have been exposed to water damage, are going to continue to be exposed; you’re risking damage. The gas valve is an electronic component, controlled by the PCB. 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. Locking Error: The boiler will flash a warning triangle and a fault code. 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. Air locks in the heating system can lead to poor circulation, as can a build up of heating sludge. This is always the same. However, if your gas valve is beyond repair, you’ll need a replacement. Typically, a boiler servicing and repair company is going to start by checking all airways are clear. The Suprima is a strikingly small boiler. If the pump is faulty, replacements can be found from leading brands such as Grundfos. 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. However, this is a fault that’s directly related to the gas valve. 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. The first place to start is the burner. They’ll be able to find and fix the fault. The Fix: The diaphragm washer can … This helps your boiler repair company to quickly diagnose what the problem is, rather than having to fault-find every single component in your boiler; the fault code system makes repairs cheaper. Doing it efficiently is about understanding the concepts and principles of combi boiler components and how they work, especially in relation to each other. The gas valve should be closed, but the PCB is still detecting a flame. For instance, the ST620WBC from Salus, is designed specifically for Worcester boilers, and not any other brands. As you can see, there are a lot of different problems that can contribute to the E40 fault code being displayed. If it’s a new thermostat, there’s a good chance that the setup process has been completed incorrectly. Damage can occur to these wires from boiler vibrations, water and even old age. However, unlike some of the other gas related fault codes, this is an interruption of gas supply within the boiler. So, the boiler is likely to lock out, before displaying the fault code. The quick fix here, is to have a Gas Safe engineer replace the NTC thermistor. Potterton Suprima 60 Boiler Fault Customer reported boiler repeatedly locking out. If it’s a particularly old thermostat, it’s likely they’ll test it using a multi-meter. This reduces the pressure in the boiler to a point where it can’t operate. All repairs on Combi boilers require a methodical approach and have a logical and efficient method of diagnosing combi boiler faults. Your boiler needs to communicate with the thermostat, to know when you have higher/lower demand for heating. Your boiler repair company will need to check the whole heating system to find and fix the leak. If the supply of gas isn’t the problem, it could be a sensing fault. 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. 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 your boiler is losing pressure, it’s likely you have a leak. The code is generated by the boiler’s printed circuit board(PCB). The E160 fault code on Potterton boilers is a fan fault. That’s going to include checking the flue for debris blockages, and the condensate pipe. Test the electrical circuits by checking for short circuits, continuity (earth) and resistance (to earth). For more boiler issues regarding any other type of Boiler then please visit the Boiler Problems And Cures page. 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. The first place a boiler repair specialist will start, is the pump. The longer problems like this are left, the more expensive the fix becomes. The quicker the issue is found and repaired, the more likely it is that a quick and cheap fix is available. Like all mechanical parts in your boiler, the fan can fail over time. © 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. That means your boiler engineer is going to be focused on wiring and connections to/from the valve. And, like the above, it’s likely that the gas valve is stuck closed. 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. If there’s a problem with the PCB, or with wiring and connections to/from it, the signals could be misleading. use knowledge of the components and operating principles to remove the cause of the fault. If necessary, contact the manufacturer using the technical advice lines for specialist advice. Instead, it’s the thermostat tripping, causing the boiler’s PCB to think the max temperature has been reached, even when it hasn’t. It is either failing in its heating role or failing in its hot water role or both. Cause Error When the E09 fault code is displayed, it means that the connection is weak, intermittent, or non-existent. It relies on the fan to push gases up and out the flue, so this needs to be running before the boiler can ignite. Suprima by Potterton, 30-80 and 30L-80L (but NOT Suprima HE). Boiler inlet gas pressure level at the gas valve should be set for 20 mbar. heatandplumb.com supplies over 90,000 heating and plumbing products to the trade and public at highly-competitive online prices. In some cases, we’ve found the problem is electrical, but other contributing factors aren’t helping. Ideal Boiler Fault Finding Information for Vogue Max Combi, Vogue Gen2 Combi, Vogue Max System and Vogue Gen2 System . paul - December 19, 2018. A fluctuation in temperature via the NTC thermistors could indicate a problem, and the boiler locks out. If that’s the case, the fan can be adjusted, so it creates a big enough draught to push gases out of the flue. 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. 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. Typically, we find it’s years of boiler vibrations working these connections loose, or a small level of water damage. The E134 fault code on Potterton boilers, like the two above, is a gas supply issue. This leak could cause further damage. 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. Unfortunately, they’re not cheap components to replace. 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. That’s going to cause a gas supply issue that could be dangerous. For example, a small connection could have come loose, and re-securing that connection is going to fix the problem. Fault Finding Charts and Tables The troubleshooting manuals below is an easy step by step process to fault find your Baxi Combi Boiler. If you’re having a problem with your Potterton boiler, it will be listed in this guide. Typically, the E321 stems from an electrical fault. Many manufacturers provide training courses and basic instruction manuals for specific models of boiler. The E125 fault code on Potterton boilers, is another common one. But, there are other common reasons that the E125 is displayed. 3737. So, it might not be reading the readings from the thermistor correctly. Typically, this is a gas supply issue. The E384 fault code can be fixed by first, determining the exact cause of the problem. Your boiler repair specialist will also need to analyse the components in your boiler such as the thermistors and PCB. The boiler can then be reset to clear the E160 fault code. Expect a replacement PCB on a Potterton boiler to be in the region of £500. If the connections are simply loose, they can be re-secured to clear the E135 fault. 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. Valves are known for sticking. Instead of attempting DIY fixes, speak to a boiler repair company instead. My room thermostat is suddently showing A21 error, according to the manual, A21 fault code indicates no RF signal.