An emergency for your heating and cooling unit typically involves situations where your system poses a safety risk, fails to provide heating or cooling during extreme temperatures, or experiences sudden and severe malfunctions that affect your comfort or health. Examples include gas leaks, electrical issues, complete system failures in extreme weather, or situations where vulnerable individuals such as the elderly or those with health conditions are left without heating or cooling. Immediate professional assistance is crucial in such emergencies to prevent further damage and ensure your safety.