Ignition
It is used to ignite the gas, that heats the water in your heating system. If the pilot light is not working properly, you should reset it.
Common problems with Ignition include:
If you have one of them, you’ll need to buy a new ignition by matching it to your device’s brand. Sparepartsmarkt has lots of ignition for various models of Bosch, Baxi, Viesmann, Ariston and etc. Just find a suitable ignition and your boiler will get to back its top form once again.