The answer to 'how to clean emergency HVAC service' is to regularly maintain and clean your HVAC system to ensure it runs efficiently and safely. This includes cleaning the air filters, coils, and other components on a schedule recommended by the manufacturer.
For emergency HVAC service, it's best to call a licensed and insured professional technician who can properly diagnose and repair any issues. They have the necessary tools, training, and expertise to safely clean and service your HVAC system without causing further damage.