I have a hydronic heating system and have recently bled my radiators (because there was a lot of clanging recently when the boiler turned on, so I was under the impression that that was because of a build-up of air in the pipes) So, I bled the radiators, and ever since then my boiler has not turned on. I also have lost all pressure (gauge reads zero). Wondering if the loss of pressure is a result of bleeding, and if so, how to I get back the pressure.
Underneath (usually) your boiler there will be a tap that tops up the pressure in your boiler. You need this to be around 1-1.5 bar. And yes bleeding the radiators will cause this problem. You will find that over a period of time the pressure will naturally drop so the clanging was likely the pressure already low. If you can't find the filling point check the boiler manual as sometimes there is one fitted to the boiler
it sounds like you dont have enough waterin the system. add water to the boiler to get upto 20 ponds of pressure then if you need to bleed the radiators you need to maintain 15 to 20 pounds of pressure
