Average response times for appliance repair services can vary depending on several factors, including the time of year, the specific company's workload, the type of appliance, and the severity of the issue. It's best to contact local appliance repair companies directly to inquire about their current response times and availability. You can also check online reviews or ask for recommendations from friends or neighbors who have recently used appliance repair services in the Charleston area to get an idea of their experiences with different companies.