There are several reasons why your boiler may be experiencing low pressure. For example, a Vaillant electrode will cost around £24.59, and an ignition cable will be around £33. The cost to you would be the part plus labour. This can be done if you hire one of our Gas Safe engineers, as they carry parts with them, meaning they may be able to solve the problem there and then. The spark electrode may become worn down, or the wire connecting it to the printed circuit board may be faulty or broken.Įlectrode failures can be solved by replacing the part. There may also be a fault with the ignition system (ignition cable, ignition electrode, ignition transformer, or ignition plug). You may have a faulty PCB or have the PCB incorrectly plugged in.Ī problem will arise if one of the wires is incorrectly connected or if there is a break in the wiring. The printed circuit board or PCB is the hub of the boiler where all its components are electronically connected. It may begin to work again if it doesn’t, then call an engineer for assistance. If you feel you can try and defrost the pipe this way, wait for a moment, then try to reset your boiler. Pour water from your kettle carefully over the pipe, but be careful, as if the temperature outside is freezing, the water you pour could freeze on the ground, causing a hazard. Try to feel down the pipe and see if there is an area that feels colder than the rest – this may suggest a blockage or that it is frozen. Defrost the frozen condensate pipe to clear the blockageĪlternatively, you may be able to defrost the condensate pipe yourself using hot water. If they find the condensate duct blocked, they will work to unblock it and get the system up and running again and restore the gas flow pressure. If it is frozen, your engineer will simply defrost it using hot water. There is also a possibility of your condensate duct being obstructed or blocked.Ĭondensate pipes are relatively easy to sort. The condensate pipe will filter all of the excess water waste as vapour from the combustion process in the boiler.ĭue to the heat radiated from the boiler, the vapour condenses back into water and can then be disposed of with the rest of the water waste from your home. Cold weather may cause a frozen condensate pipe to cause a blockage To replace gas valves may cost around £300, including parts and labour – Bare in mind that you can get a brand new combi boiler for £1,700. If there is a gas valve fault, you may need to get a new one. This means the boiler isn’t able to function properly, leaving you with a faulty gas valve as the problem. However, if your boiler is an older model, there may be signs of wear and tear to the gas valve, causing it to stick. When gas is required, the gas valve will open and close. A mechanical fault may cause the gas valve to stop functioning However, if you are still getting gas to your other appliances, the Vaillant F28 fault code means there is an issue with your boiler. If they don’t work, the problem is with your gas supplier and not your boiler.Īlternatively, if you are on a pre-paid meter, you could try making a payment, then resetting your boiler manually and restarting it. This can be checked by trying other appliances in your home that use gas to see if they still work. This may be because there is an issue with the gas supply in your local area or a missed payment on your gas meter. This applies to most of the popular Vaillant boilers. Here are some common causes of this ignition failure and lack of gas in your boiler. Vaillant officially states that the F28 error code is an ignition fault. What causes the Vaillant boiler F28 error code? There are several reasons why your boiler is not working, which we’ll take a look at below.īroken boiler? Check out some of the best combi boilers available right now for less than you might think: The boiler will attempt to light three times if it cannot detect a flame, the F28 code appears, meaning there is a problem. The code means there has been a “lockout” in your boiler system. The F28 code will appear on Vaillant models including the Vaillant Ecotec Pro and the Ecotec Pro Plus. When one of these fault codes appears on your Vaillant boiler, you may be wondering what is wrong. If you have a Vaillant boiler, you may have seen the F28 code appear on the boiler display.
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