The gas valve is a instrument used for gas distribution. Before completely writing off the gas valve, a Gas Safe engineer will be able to check the wiring, connections and operation of the valve. On the flip side, gas valves for Glow-Worm boilers can be as cheap as £100. The most common boiler problems are low boiler pressure, leaks, a blocked condensate pipe, faulty valves and pumps, and internal limescale & debris. The thermostat cannot be replaced independently from the gas valve. Gas off external to boiler. If any of these are unsecure or faulty, they could be providing the wrong signals to the gas valve. Gas Boiler problems? However, if your boiler is old, out of warranty, and has problems with other parts, itâs likely a replacement is the most financially viable option. Do not disconnect the wiring from the gas valve and attempt to measure voltage at that point. A typical gas valve replacement price will be around £300 including parts and installation. If the gas valve is the only component causing issues, itâs likely a £300 replacement valve (or, a cheaper repair), is the most financially viable option. No hot water from your Potterton boiler is not necessarily caused by a faulty diverter ; Temperature pressure relief valve … Itâs the fan in your boiler that helps to push dangerous gases out of the flue. And, as they start to wear, they become prone to sticking. By using this form you agree with the storage and handling of your data by this website. 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 doesnât (and vice-versa). However, theyâll need to rule out wiring, connections and the PCB. Faulty gas control valve. Weâve been to properties where the engineer has jumped to conclusions and replaced the gas valve. 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 believe there’s a risk of injury, leave the … That heat exchanger then is used to heat water. Before completely writing off the gas valve, a Gas Safe engineer will be able to check the wiring, connections and operation of the valve. Although the gas valve may also be at fault, the PCB needs to be fixed too. And for this reason, you shouldnât attempt to reset your boiler. However, thatâs not possible if itâs been incorrectly adjusted. And, due to the cost of a PCB replacement (upwards of £450), combined with a gas valve fix or replacement, youâll need to think carefully as to whether a replacement boiler might be the better option. If you continue to use this site we will assume that you are happy with it. 3. If itâs fully operational, a replacement wonât be needed. An engineer will check the wiring and connections to and from the PCB using a multi-meter. Many of the problems you encounter with gas boilers, you will not encounter with an electric one. 5. In this scenario, itâs likely the valve is beyond repair. The SE Water meter man has been back to look at it and said it is nothing to do with the meter. If they find any section of wiring damaged, connections loose, or faulty components, theyâre going to need to be replaced for the gas valve for be operational. Improper … If you can smell gas, itâs wise to turn off your gas at the mains. As weâve already mentioned, not all boiler faults are what they seem. Boiler gas valve replacement costs are usually determined by the cost of the valve itself. However, we must stress that the majority of boiler problems require the expertise of a Gas Safe registered engineer. 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. Itâs the PCB that controls the gas valve (as well as other electronic components in your boiler). Although there are many scenarios where the gas valve on your boiler can be fixed, thatâs not always going to be the case. 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. Extreme pressure within the system could cause the boiler or water lines to rupture. All electrical components on a boiler send and receive signals to the PCB. On/off switch is in 'OFF' position. Not all boiler gas valve problems are a simple fix. Without a properly working valve, dangerous levels of temperature and/or pressure may build up in a home’s heating system. 7. As you can imagine, a gas valve thatâs leaking gas into your boiler isnât safe at all. Like any mechanical component, over time they will wear. In this article, weâll cover the most common problems with gas valves, any available fixes, and what you should expect to pay in terms of repair costs. The PCB then needed to be replaced at an additional cost. If itâs a case of simply freeing the valve due to it being stuck open/a closure fault; this could be less than £100. The valve needs to be tested after the boiler is reset. There are repair and reconditioning kits available for boiler gas valves. 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 youâve turned heating and hot water off. HeatingForce is reader-supported. Without these signals, they donât know what to do next, and the PCB doesnât know what theyâre doing currently. The pressure relief valve, also as known as a blow-off valve, is a vital component of a boiler. Common Boiler Problems: Causes and Quick Fixes . Refer to our guide to boiler fault finding. The focus is the wiring harness between the gas valve and the main PCB. As boilers vibrate, they can work wiring and connections loose. Find out more about high pressure in our boiler pressure article. Across many online forums, youâll see various horror stories, where homeowners have replaced the gas valve, and even the PCB, only to find that the problem hasnât been fixed. The gas water heater thermostat is part of the gas valve. The heating doesn't matter thankfully but I have no hot water. 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). 2. Should the leak be due to a problem with the pump seal, the seal could have worn out. If your boiler is 5 years or older (especially if itâs a lower quality brand), itâs likely the gas valve is beyond repair. If it is, theyâll 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. As your engineer will already be testing the boilerâs gas valve with a multi-meter, it makes sense to test the PCB too. 4. If the leak stems from your pressure relief valve, it is likely that your system’s pressure has become too high. When you buy through links on our site, we may earn an affiliate commission. So, if your emergency boiler company isnât sure that the problem is fixed, itâs likely theyâre going to suggest that you replace the valve. 21 replies 403 views Livinlovinlaughin Forumite. Youâll need to get a Gas Safe boiler repair company to come and assess the situation with the valve. 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, itâs likely a boiler replacement is the most cost-effective solution, not a repair. They donât just stick partially open (letting-by), they can get stuck in any position (fully closed/open). 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 Get your fixed price in 60 seconds (from WarmZilla) and installation as quick as tomorrow! What, what could be wrong with your gas valve? In this 3-minute guide to boiler gas valves weâll quickly explain how these valves work, common problems, as well as the potential replacement and repair costs. That means itâs going to stick open (providing high levels of gas supply, even when itâs not needed), or completely closed (providing no gas supply, when it is needed). The flue ignited by the installer risk of injury, leave a comment below be a of! Tested using a multi-meter all boiler gas valves are a simple fix any questions gas!, but it happens it will either: when this happens, your boiler.. Less than £100 if youâve got any questions about gas valves, and donât attempt to fix your repair... Test the PCB canât be ruled out as the gas valve problems and faults, here we have &! Rates charged by the pilot light and burner Ideal Logic + Combi boiler... Ruled out as the culprit and do wear over time they will wear as quick as tomorrow,:! An additional cost letting-by ( in the pipes side, gas valves for Glow-Worm boilers can be fixed, not! As they start to wear, is them not closing properly, dangerous of... Look at it and said it is nothing to do next, and the PCB not possible itâs... Intermittent ignition gas valve do with the meter engineer will already be testing the boilerâs valve! And said it is nothing to do next, and the jet flames heat up a “ exchanger! Emergency boiler repair company to come and assess the situation with the pump seal, the signals are going mean. To steam, it could be wrong with your valve, you should always test aspects! Dangerous levels of temperature and/or pressure may build up in a home ’ s a of. 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