How Do I Reset My Boiler? January 10, 2025 Having boiler trouble? A simple reset often resolves common issues like lockouts or pressure problems. Whether you're dealing with a Worcester Bosch, Vaillant, or Ideal boiler, we'll cover model-specific instructions to help you get your heating system back up and running. How to reset your boiler Identify the issue Always check your boiler's display panel first. Different manufacturers use various codes - common ones include E1 (ignition failure), F1 (low pressure), or flashing lights. Your boiler manual can help interpret specific codes. Checking Boiler Pressure The pressure gauge should read between 1.0 and 1.5 bar. For low pressure, locate the filling loop (silver flexible hose) and slowly open both valves. Watch the gauge until it reaches 1.5 bar, then close the valves. You may need to bleed radiators afterwards. Check the supply gas Ensure your gas supply is active by checking if other gas appliances work. If you detect any gas-related issues or unusual smells, contact your gas provider immediately. The reset process Find the reset button (usually marked with a red flame or 'RESET'). Press and hold for 10 seconds, then release. Wait for the boiler to complete its restart cycle. Set your thermostat to call for heat and observe the boiler's response. Monitoring After Reset Listen for normal ignition sounds and watch for stable operation. The pressure should remain consistent, and you shouldn't hear unusual noises. If problems persist, don't attempt multiple resets. Model-Specific Instructions How To Reset Worcester Bosch Boilers The reset button displays a flame symbol. Press and hold for three seconds, then release. Wait for the complete restart cycle - you should hear the ignition sequence and see the flame indicator light. How To Reset Vaillant Boilers Find the button marked 'Reset' with a flame icon. Press once firmly without holding. The display will show the startup sequence - typically this takes around 30 seconds. Ensure the pressure gauge shows 1-1.5 bar before resetting. How To Reset Ideal Boilers Look for the reset button marked with either 'Reset' or a flame symbol. Hold for five seconds, then release. The boiler will begin its initialisation cycle. Watch the display panel for confirmation of a successful reset. When to Call an Expert Contact a Gas Safe engineer if: The reset doesn't resolve the issue Your boiler needs frequent resetting You notice unusual sounds or smells Error codes persist Our heating engineers are available throughout Edinburgh and Fife by calling us 0131 441 7999 and we'll be happy to help.