The answer to 'why is my boiler not cooling' is that there could be several common causes, such as a malfunctioning thermostat, a problem with the coolant or refrigerant, or issues with the blower or fan. Symptoms may include the boiler running but not producing cool air, or the system cycling on and off frequently.
Some potential solutions include checking the thermostat settings, inspecting the coolant levels, and ensuring the blower and fan are working properly. However, if you are not comfortable troubleshooting the issue yourself, it's best to call a professional HVAC technician to diagnose and repair the problem.