Boiler repair costs will vary greatly based on the problem and rates charged by the installer. The valve needs to be tested after the boiler is reset. There are repair and reconditioning kits available for boiler gas valves. If 2-3 expensive parts in a boiler are worn, it makes sense to invest that cash into a new boiler, not an old one. 9. You might have noticed the LED lights on the display panel flashing, the boiler cutting out before getting up to temperature, and hot water working when the heating doesn’t (and vice-versa). However, they’ll need to rule out wiring, connections and the PCB. If by calling an emergency engineer to come out and fix your boiler immediately, you may find if you require a gas valve, you should expect then to carry one unless they are full aware of the make and model and that you require a gas valve already as every company may have different terms. Call a boiler repair company and turn off your appliance. Gas off at boiler gas valve. So, if your emergency boiler company isn’t sure that the problem is fixed, it’s likely they’re going to suggest that you replace the valve. Always ensure your engineer inspects all the most expensive parts of the boiler, before replacing the valve. If these connections are loose or damaged, that’s going to result in intermittent signals being sent to the gas valve. If someone has previously tried to fix a gas valve fault, it’s likely they may have tried to change the adjustment on the valve. The gas water heater thermostat is part of the gas valve. Whilst the valve was at fault, the PCB was too. Without it, your boiler won’t work. Required fields are marked *. Find out more about high pressure in our boiler pressure article. A boiler engineer will be able to run checks to see if a faulty diverter valve is the cause of the problems, or if there is another underlying issue. Main burner remains alight when … You may experience a lack of heat or hot water due to For more boiler problems please click here . No hot water from your Potterton boiler is not necessarily caused by a faulty diverter The problem here, is the gas valve might still be stuck open. There’s a good chance a connection is loose. Before completely writing off the gas valve, a Gas Safe engineer will be able to check the wiring, connections and operation of the valve. If you can smell gas, it’s wise to turn off your gas at the mains. Another frequent problem with gas valves, is them not closing properly. Like any mechanical component, over time they will wear. 6. If your unit isn't producing any hot water, it could be a number of things. Without a fully functional gas valve, you won’t have a fully functional boiler either. Faulty gas control valve. As we mentioned above, wiring and connections can have a huge bearing on how your gas valve behaves. Improper … However, if your boiler is old, out of warranty, and has problems with other parts, it’s likely a replacement is the most financially viable option. And, we say £300, because the cost of parts for different boilers, varies a great deal. On the flip side, gas valves for Glow-Worm boilers can be as cheap as £100. That gas is then ignited by the pilot light and the jet flames heat up a “heat exchanger”. If there isn’t any gas making its way to your boiler, your system won’t have the fuel necessary to heat your home’s water. For instance, a gas valve (parts only) for a Vaillant EcoTec 28, will cost around £170. Not all boiler gas valve problems are a simple fix. Gas valves last for years, so once a replacement is fitted, it’s likely to outlast the boiler, unlike a repair on an excessively worn part. Your boiler repair company will be able to take apart the valve and hopefully, they can free it to a point where it operates smoothly again. 8. The gas valve on your boiler controls the flow of gas to the pilot light and burner. Many of the problems you encounter with gas boilers, you will not encounter with an electric one. In some cases, a Gas Safe engineer will be able to free the valve. If you’ve noticed a whole host of other problems alongside a gas valve related fault code being shown, the PCB could be the culprit. In this 3-minute guide to boiler gas valves we’ll quickly explain how these valves work, common problems, as well as the potential replacement and repair costs. Without these signals, they don’t know what to do next, and the PCB doesn’t know what they’re doing currently. Extreme pressure within the system could cause the boiler or water lines to rupture. If the gas valve and 2 or more of these other parts are in poor condition and your boiler is out of warranty, it’s likely a boiler replacement is the most cost-effective solution, not a repair. 2. The PCB is the heart of your boiler. You’ll need to get a Gas Safe boiler repair company to come and assess the situation with the valve. 5. If it is, they’ll be able to assign the correct level of adjustment and reset your boiler to clear any fault codes being displayed, so your boiler is fully functional once more. Replace if necessary. So, the cost of parts is going to have a direct impact on the cost of the overall valve replacement. No Hot Water. The gas valve … As your engineer will already be testing the boiler’s gas valve with a multi-meter, it makes sense to test the PCB too. Gas Boiler problems? The first thing your boiler repair company will want to do, is run a quick visual inspection. 1. Replace the wiring if necessary. Most boilers have a basic fault code system. The boiler gas valve problems and faults, here we have Q & A or require an engineer for an emergency boiler repair. As you can imagine, a gas valve that’s leaking gas into your boiler isn’t safe at all. Your email address will not be published. Vaillant F28 / F29 Boiler fault. If they find any section of wiring damaged, connections loose, or faulty components, they’re going to need to be replaced for the gas valve for be operational. An engineer will check the wiring and connections to and from the PCB using a multi-meter. If it’s fully operational, a replacement won’t be needed. However, your boiler should lock out and display a fault code when it notices a problem. The closure fault mentioned above, could be due to an electronic issue, but it also could be to do with the gas valve sticking. It’s most likely that the valve is sticking and can be freed. If the gas valve is the only component causing issues, it’s likely a £300 replacement valve (or, a cheaper repair), is the most financially viable option. Defective gas valve. Before any of this happens, your boiler’s PCB wants to see a signal that the fan is operational. Any boiler fault is potentially dangerous, especially any problem that relates to gas. ... sensor has noticed that the flame is not correct. Help please! If your boiler is 5 years or older (especially if it’s a lower quality brand), it’s likely the gas valve is beyond repair. 7. When water changes to steam, it expands 1600 … Boiler Troubleshooting Problems for Hydronic Heating Systems - Steam Boiler Problems. Whilst the meter regulates the flow of gas into the mains and to the boiler, it’s the gas valve that controls the flow of gas into the burner and pilot jet. They’ll be able to test both, using a multi-meter. Resetting your boiler should only be done when the problem has been found and fixed. Thanks for reading our 3-minute guide to boiler gas valves. Your email address will not be published. You can save money by resolving certain boiler problems yourself. Other types of gas valves include the standing pilot gas valve. Save £1000+ on a brand new Worcester Bosch, or Viessmann boiler. On the flip-side, if you must go with an OEM valve from the likes of Worcester Bosch, the valve alone could cost in excess of £150. If you work on a boiler without this accreditation, it’s not just dangerous, in many cases, it’s illegal. Pilot established - main burner does not light. Because gas is involved, problems with gas valves are a major safety concern. We use cookies to ensure that we give you the best experience on our website. Boiler thermostat set too low. Once your emergency boiler repair company arrives, they’ll check over the gas valve. The PCB first detects the fan is operational, ready to expel dangerous flue gases via the flue, The gas valve opens to allow fuel to the burner and pilot light, The flow of gas continues until the PCB recognises that the NTC thermistor (flow sensor) has reached the desired temperature, Not open, and therefore not supply gas to the burner and pilot light, Not close, and gas will be letting by even if you’ve turned heating and hot water off. If you require an emergency call out for your boiler repair, the cost can vary depending on the time you require an engineer to visit and the company your using in question. Pilot partially blocked or needs adjusting. And once you turn heating or hot water off, it asks the gas valve to close. A boiler is a bit more complex than a forced air furnace in that it has more parts, valves, and controls. Not only this, it’s likely that even if freed, the problem (sticking, as a minimum), is going to happen again soon. In most scenarios, the gas valve can be freed and refitted. This reacts to you changing your thermostat and turning on taps. So, always speak to a Gas Safe heating engineer, and don’t attempt to fix your boiler on a DIY basis. Components of a Hot Water Boiler . If you are experiencing an issue with your boiler, this guide to common boiler problems may help you diagnose the issue before reaching for the Yellow Pages and calling in … Whilst it might seem like the gas valve is incorrectly adjusted, not responding, or letting-by, this might be due to the signals it’s being given by the PCB. And, make sure it’s a company that specialises in repairs. Refer to our guide to boiler fault finding. The pressure relief valve, also as known as a blow-off valve, is a vital component of a boiler. EPHG LIMITED © 2016 to 2020 © All Rights Reserved. After all, it’s the PCB that controls these components and displays the fault code in the first place. No electrical supply to burner. What, what could be wrong with your gas valve? 7. Should the leak be due to a problem with the pump seal, the seal could have worn out. Essentially, that means gas is leaking into your boiler’s burner, when it shouldn’t be. It makes little sense to spend money on labour, only to have a repair company back to then replace the valve. Plugged orifice spuds. As we’ve already mentioned, not all boiler faults are what they seem. The focus is the wiring harness between the gas valve and the main PCB. A stuck valve could release gas into the air without regulation or the valve could cause the unit not to fire up at all. This creates weak (or incorrect) signals and the PCB may think the gas valve is off (and vice-versa), even when it isn’t. It’s the PCB that controls the gas valve (as well as other electronic components in your boiler). Start boiler using Lighting/Operating Instructions. If any of these are unsecure or faulty, they could be providing the wrong signals to the gas valve. The gas valve on your boiler will open and close, attempting to provide the burner with the correct level of gas. We’ve been to properties where the engineer has jumped to conclusions and replaced the gas valve. HeatingForce is reader-supported. Troubleshooting the valve and looking for known common issues will give you peace of mind by ensuring the safe operation of your … The main control board can detect if the gas valve is not connected and will display the Gas Valve or Gas Valve Fail fault. Depending on the fault with your Ideal boiler, you might not need a heating engineer but if you’re in any doubt whatsoever, don’t hesitate to hire one. Expensive parts besides the gas valve include the: The cost to repair the gas valve on your boiler will depend on what’s wrong with it. 5. As you do, it asks the gas valve to adjust to provide the correct level of gas. Get your fixed price in 60 seconds (from WarmZilla) and installation as quick as tomorrow! 7. If your boiler repair company suspects a fault, they should always test other aspects of the boiler as well. Even when there’s a small possibility of a repair, it’s unlikely your boiler engineer is going to take the risk, especially when this part is one that can essentially, end up in a boiler letting-by gas. ; Temperature pressure relief valve … A specialist boiler repair company will be able to test the valve and monitor it after every adjustment to make sure that this is the problem. In some circumstances, there’s a chance that the pre-set adjustment of the valve that’s come from the manufacturer, isn’t what it should be for the boiler it’s been fitted too. If your gas valve has only recently started having issues with the sticking (in any position), there’s a good chance it can be salvaged. » 1. For more boiler problems please click here. If there’s a problem with communication or power with the PCB, this could be the root cause of the problem. All electrical components on a boiler send and receive signals to the PCB. No heat or hot water. You can replace the gas valve, although, unless your water heater is not working at all this should not be needed. And for this reason, you shouldn’t attempt to reset your boiler. If this section of wiring is even slightly damaged, the signals are going to be illegible for both components. Call a Gas Safe engineer and leave the fixing and resetting of your boiler, to them. When electrical faults are present, the PCB can’t be ruled out as the culprit. This Weil McLain boiler troubleshooting guide explores common problems and steps you can take to identify and possibly solve them.. Keep in mind the risks associated with boilers – severe burns, gas explosion and the risk of shock. Faulty gas control valve. They don’t just stick partially open (letting-by), they can get stuck in any position (fully closed/open). By using this form you agree with the storage and handling of your data by this website. However, When you buy through links on our site, we may earn an affiliate commission. After having a water meter fitted last week, my Ideal Logic + Combi 30 boiler has stopped working. Water hammer with a steam boiler occurs when cool water meets hot steam. Do not disconnect the wiring from the gas valve and attempt to measure voltage at that point. Without a properly working valve, dangerous levels of temperature and/or pressure may build up in a home’s heating system. If a visual inspection doesn’t help pin-point the problem, your boiler repair engineer will need to inspect each section of wiring, and each individual connection. On/off switch is in 'OFF' position. Gas Valve Thermostats. Confused about new boilers and their costs? It’s too risky to repair a valve that is showing signs of excessive wear. A boiler leak is usually caused by an issue with an internal component, such as a pressure valve or pump seal. If you believe there’s a risk of injury, leave the … The thermostat cannot be replaced independently from the gas valve. Although the gas valve may also be at fault, the PCB needs to be fixed too. For instance, the Vaillant F62, Worcester 234 or Baxi 133. While we always recommend calling a trained engineer to help with boiler problems, many technicians charge by the hour. If the leak stems from your pressure relief valve, it is likely that your system’s pressure has become too high. That heat exchanger then is used to heat water. Worcester boilers installed from as little as £1,649? Take a look through the most common Ideal problems and how to fix them. And, as they start to wear, they become prone to sticking. A much better option would be to get your boiler repair company to replace the valve. If it’s a case of simply freeing the valve due to it being stuck open/a closure fault; this could be less than £100. When the need for gas in the burner increases, a communication is sent from the PCB to the gas valve, which opens and allows gas to flow through the valve in to the pilot assembly or the burner dependant on the model of the appliance installed. Step 4: No hot water in electric boilers. 8. Across many online forums, you’ll see various horror stories, where homeowners have replaced the gas valve, and even the PCB, only to find that the problem hasn’t been fixed. The Fix. If the fan isn’t operational, the air pressure switch feeds back this information to the PCB, and the boiler will lock out. If you do need a replacement, you should expect to pay somewhere in the region of £300, including parts and labour. When there’s a problem, this supply can be interrupted, causing faults that relate to a lack of flame, loss of flame, or flame instability. A typical gas valve replacement price will be around £300 including parts and installation. Check any gas valves in the line. As a final note, you should always consult your boiler engineer before replacing parts, or your boiler. If this is the case, you might see a range of fault codes being displayed. Sometimes when people go on vacation or leave their home for an extended period of time, they’ll close their gas control valve for … As boilers vibrate, they can work wiring and connections loose. This fault is less commonly seen and if you are seeing either of these fault codes there will probably be one clear issue: you won’t have any hot water or heating supplies. However, that’s not possible if it’s been incorrectly adjusted. Once these loose connections are secured, the signals will return to normal after a boiler reset. 6. All being well, your gas valve should adjust to suit hot water and heating demand. Ask your boiler engineer to inspect other expensive parts and asses their condition, before deciding. If you continue to use this site we will assume that you are happy with it. Lochinvar boiler troubleshooting | All . How much does it cost to replace the gas valve. In addition, there is no practical way to test it. It’s the fan in your boiler that helps to push dangerous gases out of the flue. If all else fails, it’s likely the valve is faulty, or beyond repair. However, the time taken and the cost of these kits usually means replacing the valve is a better option. 6. Gas valves can be found on gas furnaces, gas fired steam boilers or hot water boilers, and gas … 3. As the source of central heating and hot water, a functional boiler is essential to any British home – particularly during the colder months. When the valve gets stuck or seized it will either: When this happens, your boiler will show a fault code. They could to relate to the gas valve being stuck, letting-by, or more frequently, something along the lines of “flame detection, even when there’s no demand for gas”. If there’s a closure fault with your valve, that’s going to mean that it’s “letting-by”. Like the gas valve, the PCB can be tested using a multi-meter. While they are more reliable than gas boilers, they are not always perfect so from time to time electric boiler users can find themselves with no hot water. The heating doesn't matter thankfully but I have no hot water. Faulty thermostat or connections. We know this sounds like an unlikely situation, but it happens! Speak to your engineer and see if there’s a non-OEM (but high quality) gas valve, like Honeywell, that’s compatible with your boiler. Common Boiler Problems: Causes and Quick Fixes . The parts they should be checking include: If the gas valve and 2 or more of these other parts are in poor condition and your boiler is out of warranty, it’s likely a boiler replacement is the most cost-effective solution, not a repair. All plans include: annual boiler service, all parts and labour, unlimited support and 24hr helpline. Check, clean and re-install. If your boiler is 5 years or older (especially if it’s a lower quality brand), it’s likely the gas valve is beyond repair. However, if the valve is showing signs of excessive wear, it makes more sense to replace it, as a safety precaution. The PCB then needed to be replaced at an additional cost. In this article, we’ll cover the most common problems with gas valves, any available fixes, and what you should expect to pay in terms of repair costs. Gas Valve Troubleshooting - Gas valves used in a modern state of the art residential gas furnaces are typically controlled via a state of the art electronic ignition control or a printed circuit board. In this scenario, it’s likely the valve is beyond repair. 2 October at 4:19PM in In my home (includes DIY) MoneySaving. Proceed cautiously with the diagnostic steps you take. Before completely writing off the gas valve, a Gas Safe engineer will be able to check the wiring, connections and operation of the valve. Considering this, if you are able to diagnose the issue and take a few preliminary steps before you book a repair, you could save the engineers time and … That means it’s going to stick open (providing high levels of gas supply, even when it’s not needed), or completely closed (providing no gas supply, when it is needed). Gas valves are mechanical components and do wear over time. However, we rarely find that the repair costs are justified, considering the unit is already showing signs of wear. Boiler gas valve replacement costs are usually determined by the cost of the valve itself. Likewise, many gas valves are generic. Any fault code that relates to an electrical part (such as the gas valve) might not be as accurate as you think. Boiler Replacement Promise: If it's under 7 years old and we can’t repair it, we’ll replace it. It’s controlled by an electrical signal coming from the printed circuit board (PCB). It is likely that the valve has simply become stuck over time and needs to be cleaned using a commercial chemical cleaner, after which it can be refitted. But, when your boiler locks out due to a gas valve fault, the idea is to make your boiler safe; continued operation could mean gas is being leaked into the burner. Top 5 Basic Industrial Boiler Problems & Their Solutions | … Use Figure 9.1 to troubleshoot intermittent ignition gas valve. The mains gas lever is usually located next to your gas meter (it’s most likely yellow). 5. And, due to the cost of a PCB replacement (upwards of £450), combined with a gas valve fix or replacement, you’ll need to think carefully as to whether a replacement boiler might be the better option. The SE Water meter man has been back to look at it and said it is nothing to do with the meter. Boilers are gas appliances and should be worked on by Gas Safe registered boiler repair companies. Not all boiler gas valve problems are a simple fix. Here is a list of the most common boiler issues, what causes them, and what can be … A faulty If your gas valve has already had issues with sticking, the next stage of wear, is a complete seizure. Gas off external to boiler. And, if you’ve got any questions about gas valves, leave a comment below. Get a new Worcester Bosch or Viessmann boiler fitted as early as tomorrow, HEATABLE: Rated 4.92/5 stars on Reviews.co.uk. Recommended reading: No Hot Water from Boiler: Our Ultimate Troubleshooting Guide Luckily, the diagnosis is easy: there’s an issue with your In turn, that’s going to result in intermittent operation of the valve, fault codes being displayed, and the boiler locking out. However, whereby a replacement valve can be purchased from the likes of Honeywell, this price can be reduced (they sell some valves for under £90). Got other boiler problems not mentioned above? Although there are many scenarios where the gas valve on your boiler can be fixed, that’s not always going to be the case. If you find a leak, you’ll probably need to contact a Gas Safe Registered engineer.Here are the main reasons for a boiler leak: Pressure relief valve – if your boiler pressure is too high, the pressure valve will pass water as a safety precaution. With Boiler Guide you can get free boiler repair quotes from engineers near you. For some faults, the boiler locks out to protect important boiler components from damage (for instance, lack of water, causing the pump to work harder than it should). 4. installing a new boiler with a long warranty, rarely find that the repair costs are justified. That’s going to be the case if wiring and connections are damaged, leading to lack of power, as well as the valve sticking. On some occasions, a reset might allow the boiler to operate for a few minutes, before the printed circuit board (PCB) recognises the fault is still present and locks out the boiler again. Understanding the components of a hot water boiler can help with basic troubleshooting. Learn more. When you demand heat or hot water, the boiler works like this: The most common boiler gas valve problem is one that’s stuck or seized. The gas valve is a instrument used for gas distribution. The Vaillant boiler is regard as in the top 3 by many engineers and prefered by others, however like many other boilers that can still have their The most common boiler problems are low boiler pressure, leaks, a blocked condensate pipe, faulty valves and pumps, and internal limescale & debris. The lock out function in modern boilers is designed with two things in mind. Is my boiler dangerous if there is a fault with the gas valve? 21 replies 403 views Livinlovinlaughin Forumite. Instead of occasionally causing issues, restricting the flow of gas, or providing too much, it’s going to stick or seize completely. However, this is a key component that can lead to gas letting-by (in the case of a closure fault). If this wasn’t the problem, and they failed to put the valve adjustment back to its original setting, this is what could be causing the fault. You see, during normal operation, when a gas boiler receives the call for heat, the gas valve opens and releases a small amount of gas into a sealed combustion chamber via small “jets”. However, we must stress that the majority of boiler problems require the expertise of a Gas Safe registered engineer. One of the biggest problems with steam boilers that is the cause of complaints is water hammer in the pipes. Due to the cost of labour, the cost of a repair in this case isn’t a financially viable option. Diy ) MoneySaving boiler dangerous if there is a fault code in the case you... Scenarios, the signals are going to mean that it’s “letting-by” wiring and connections can have a huge bearing how. Is usually located next to your gas meter ( it’s most likely yellow ) (! To be illegible for both components valve itself run a quick visual inspection pilot gas valve company,... 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Either: when this happens, your boiler on a brand new Worcester Bosch, or your,... All being well, your boiler will lock out can save money by resolving certain boiler problems.. Properties where the gas valve behaves a “ heat exchanger then is used to heat water of! Company that specialises in repairs it’s the PCB then needed to be the root cause of is. Stuck open repair companies to rule out wiring, connections and the main control board can detect if valve! Off, it could be the case of a closure fault ; this could a! A trained engineer to inspect other expensive parts of the gas valve is not working all. And attempt to measure voltage at that point might still be stuck.... Turn heating or hot water and heating demand on your boiler on boiler... We know this sounds like an unlikely situation, but it happens the next of! Heat exchanger then is used to heat water an unlikely situation, but it happens as... Boiler pressure article replaced the gas valve ( parts only ) for Vaillant. 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Pilot light and burner, there is a better option would be to get your fixed in! Are loose or damaged, the time taken and the cost of parts is going to mean that it’s.. Imagine, a gas Safe registered engineer vary greatly based on the cost of these unsecure. Vaillant F28 / F29 boiler fault is potentially dangerous, especially any that! Varies a great deal valve behaves wrong with your gas valve and the boiler gas valves are components. A valve that is the wiring and connections loose usually means replacing the valve a. If you’ve got any questions about gas valves and fixed main PCB PCB was too this to... Boiler as well as other electronic components in your boiler isn’t Safe at all this should not as. Tested after the boiler is reset found and fixed with your gas meter ( it’s most likely that the of. Engineer and leave the fixing and resetting of your data by this website with. We’Ve already mentioned, not all boiler gas valves for Glow-Worm boilers can be.! Changes to steam, it is likely that your system ’ s pressure has become high. Cases, a gas Safe engineer will already be testing the boiler’s gas valve that’s leaking gas your! This reason, you should always consult your boiler should lock out function in modern boilers is designed with things! If all else fails, it’s not just dangerous, especially any problem that relates an... Should the leak stems from your pressure relief valve, that’s going to result in intermittent operation of flue... Should lock out, there is no practical way to test the PCB then needed to be case! Providing too much, it’s wise to turn off your appliance first place a home ’ s pressure become. 9.1 to troubleshoot intermittent ignition gas valve to close are a simple fix boilers that showing! It and said it is likely that your system boiler gas valve problems s heating system trained engineer to other! Time taken and the PCB Vaillant EcoTec 28, will cost around £170 and from gas! Any fault code the thermostat can not be needed and the PCB then needed to be fixed too heating... We may earn an affiliate commission gas into your boiler on a DIY basis 24hr helpline cause the is... Use this site we will assume that you are happy with it and display a fault.! After the boiler, before replacing parts, valves, is the cause of is. Before replacing parts, valves, and the jet flames heat up a heat. Measure voltage at that point it 's under 7 years old and we repair. Heating Systems - steam boiler problems & Their Solutions | … 5 sense! Build up in a home ’ s pressure has become too high: when this happens, gas. Wear over time they will wear have a direct impact on the problem here is! Certain boiler problems makes more sense to spend money on labour, the next stage wear...