The Fix: An engineer will either replace the fan or the PCB. Also, check ignition leads and power from the PCB. I’d recommend getting a multimeter out and checking your readings from the PCB to the fan. However, if the fan does not come up to speed, you have an ignition fault, anyway. Fault codes F1, F3 & F4 (Flexicom CX range)Ĭodes F1 and F4 indicate an ignition fault, however F3 is a fan speed fault. TIP: Whenever I do this for my clients, I usually fit a magnetic filter and on one occasion, I’ve also replaced the thermistors (in the case of black iron oxide coating the sensors) – all good, and no second call-backs. However, as I mentioned above, I’ve found Glow-worm boilers are very sensitive to sludge build-up, so flushing the system may be advised. The Fix: It can be as simple as topping up the pressure, or getting an engineer to replace the pump. In my own personal experience, and usually also with communication from Glow-worm, this fault code has actually been caused by a sludged up plate heat exchanger – this can happen when the system has not been cleansed or adequately flushed. Is the boiler going through the correct sequence? First, check your pump is running, then check all electrics from the circuit board. The main problem here is that it’s a very generic code which can point to a few different faults relating to pressure, circulation and diverter valve issues. If so, replace the flame detection probe and lead. The Fix: Check the pilot assembly is clean and free flowing from the gas valve. Please note though, I’ve also seen this code when the boiler is not igniting due to no gas coming through the pilot assembly, It could very well be that the boiler itself requires a service, and the probe needs cleaned or replaced. If the code F16 flashes up on your Glow-worm Ci model, this indicates a flame detection fault with your boiler. So, without further ado, let’s dive right into some of the most common Glow-worm faults and fixes… 1. The parts are usually easy enough to source, and from my experience you can usually replace just one part and the boiler will fire back up – unlike some other budget brands with simultaneous faults. The good news is that although Glow-worm is a budget boiler, it’s NOT a boiler brand with numerous faults and a bad reputation. Parts are easily available and reasonably priced, and they are a popular option for many of my clients. Glow-worm is part of the Vaillant Group, and the company has its own dedicated service engineers to cover both Glow-worm and Vaillant boilers. NOTE: It’s important you DO NOT try to fix the problem yourself, unless it’s a very simple fix such as topping up water pressure or defrosting a frozen condensate pipe – for everything else, always call a Gas Safe registered engineer. That’s why I thought I’d put together this handy blog post, to help you diagnose the problem and determine whether or not you need to call in an expert – as well as to give you an idea of how involved the fix will be! I know how stressful it is – I’ve been helping people in the Edinburgh area deal with faulty boilers for over 20 years, and I’ve had many a run-in with Glow-worm boilers in that time. We depend so much on our boilers day in and day out, so it’s easy to forget that they’re even there, just doing their jobs – that is, until they break down and you’re left in the cold with no hot water or heating! Some spares we stock for Glow Worm boilers include:įor more information on Glow Worm products please contact one of our team who will be happy to find the right spare for you.Need help with a faulty Glow-worm boiler? We have next day delivery available to our customers within the United Kingdom so your boiler will be up and running again as soon as possible. We suggest using official parts and spares for your heating system as this will make your boiler work at peak efficiency. They lead the UK in producing highly efficient boilers and other products. Glow worm has manufactured the best heating systems on the market. Founded in Derbyshire, in the early 1930’s, they have been are the forefront of heating and energy solutions. The company has been around for over 70 years, innovating and producing heating products for Britain. We sell a huge selection of boiler spares and parts for Glow Worm boilers so we’re sure you’ll find what you need at MJT. Glow Worm is one of the most reputable heating companies within the UK.
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