Typically, appliance repair technicians who offer refrigeration repair also work with washers, dryers, dishwashers and other household appliances. While there is no formal training required to be an appliance repair technician, consider certification requirements, as the technician should know how to safely work with refrigerants (the chemical that keeps your fridge cold) and substitute refrigerants such as HFCs. You should also read reviews to get a sense of the pro’s experience and reputation. The appliance repair pro will come to your home, bringing all the necessary tools for diagnosis. They may need to order parts to complete the job, but all the work will take place in your home. For more, check out our tips for smart hiring on Thumbtack.