Common boiler how-to guides
Reset a boiler
Find the right first step for your boiler brand, read the fault display and know when not to keep resetting it.
How to reset an Ideal, Worcester Bosch, Vaillant or Baxi boiler →
Top up boiler pressure
Learn how to read the pressure display, use the correct filling arrangement and spot signs that need an engineer.
Thaw a frozen condensate pipe
Learn how to recognise a possible ice blockage and safely thaw an accessible pipe at ground level.
When a guide is not enough
Repeated lockouts, falling pressure, a water leak or a fault that returns after a reset can point to a problem that needs diagnosis. Do not open the appliance or try to repair it. Arrange a visit with an appropriately qualified engineer and share the make, model, error code and what you have already tried.
If you smell gas, leave the property if needed and call the National Gas Emergency Service on 0800 111 999. Follow the current HSE advice for suspected gas leaks.