There can be a variety of reasons why your radiant heating system may not be working correctly. Some common causes include a clogged filter, low water pressure, or a malfunctioning boiler. If you are unable to identify the cause of the problem yourself, it is best to consult with a professional technician who can help you troubleshoot the issue.

Most likely, the cause of your radiant heating system not working is that there is something obstructing the flow of heat from the floor to the room. This obstruction could be something as simple as a layer of dust or dirt on the floor, or it could be a more serious problem such as a hole in the ductwork. If you're unsure what might be causing the problem, it's best to call in a professional to take a look at things and diagnose the issue. In some cases, it may be necessary to replace certain parts of the system in order to get it up and running again.