The answer to 'evaporator coil blowing hot air' is that the evaporator coil is likely not functioning properly. This can be caused by a few common issues, such as a refrigerant leak, a problem with the blower fan, or a clogged air filter. When the evaporator coil is not working correctly, it can blow warm air instead of the expected cool air.
Some key symptoms to look for include warm air coming from the vents, reduced airflow, and potentially higher energy bills as the system works harder to cool your home. If you notice these issues, it's important to troubleshoot the problem promptly to prevent further damage and ensure your HVAC system is running efficiently.