The answer to 'why is my boiler blowing hot air' is that there could be several common causes, such as a malfunctioning thermostat, a problem with the heating element, or a blockage in the system. This can lead to symptoms like the boiler running constantly, the water not getting hot enough, or the boiler making strange noises.
Some potential solutions include checking the thermostat settings, cleaning or replacing the heating element, and inspecting the boiler for any blockages or other issues. However, if you're not comfortable troubleshooting the problem yourself, it's best to call in a professional HVAC technician to diagnose and repair the issue.