What precautions should be taken with flood damaged HVAC equipment?

IN THE INTEREST OF PUBLIC SAFETY, ECR INTERNATIONAL, INC. SUPPORTS WARNINGS ISSUED BY THE AIR CONDITIONING, HEATING AND REFRIGERATION INSTITUTE (AHRI) THAT RECOMMEND THE REPLACEMENT OF ALL FLOOD DAMAGED HVAC EQUIPMENT REGARDLESS OF ITS AGE. 

Replacing only the operating controls of flood damaged HVAC equipment may not be sufficient if other parts of the equipment like piping, venting, burners, insulation, etc., have been effected by the flood waters. 

IT IS ALWAYS SAFER TO REPLACE RATHER THAN REPAIR