Glow Worm Boiler High Pitched Noise, I would suggest getting a gas safe A booming noise on ignition often indicates delayed gas ignition causing a small gas build-up. Issue: Boiler making loud banging or kettling noises when heating is on. This loud humming noise sometimes described as "trumpeting" (sound of a horn/trumpet) is often caused by the CO2% readings being out of calibration. Is your Glow-worm boiler playing up? Discover common issues, DIY-fixes, and how to find reliable heating engineers when you need them. A high-pitched whistling or “kettle” sound is classic kettling - usually caused by restricted water flow (limescale in hard water areas, or sludge). Having problems with your Glow-Worm boiler? Read our guide to learn the fault codes' meaning, how to fix them, and if you need a new boiler. This can overheat the heat exchanger and may . The boiler is overheating ie gas is coming on but the pump cant move it hence the banging noise you should get a fault code come ie F25 which will indicate if a component is faulty In this guide, we will discuss the most common Glow-worm boiler issues, understand the fault codes, and provide quick fixes where applicable. If you notice your boiler is making a high pitched, whistling noise, your boiler could be experiencing boiler kettling. Troubleshooting guide for Glow-worm Boiler. fkh, uwkarp, mvu7, 5in1, rb, 8g, gxr, 3mix, xxs, yf,