Coast Appliance Parts Co distributes genuine OEM replacement parts for major household appliances from a warehouse at 4408 Twain Ave in Grantville, San Diego, stocking components for washers, dryers, refrigerators, dishwashers, ovens, ranges, microwaves, gas grills, and HVAC equipment. The 92120 location sits in Grantville's light-industrial corridor near Mission San Diego de Alcala, and the warehouse serves both walk-in retail customers and a steady stream of trade accounts from appliance repair companies operating across San Diego County. Brand coverage spans the major OEM lines: Whirlpool, Maytag, KitchenAid, Amana, Frigidaire, Thermador, Gaggenau, Jenn-Air, Hotpoint, Admiral, Magic Chef, and Speed Queen, with factory-certified parts sourced through authorized distribution channels. The HVAC parts inventory includes components for furnaces, window air conditioning units, and central air systems, and HVAC contractors in the neighborhood, including Comfort Air Conditioning & Heating in Allied Gardens, source replacement compressor contactors, capacitors, fan motors, and control boards through trade supply counters on the same Grantville corridor. Twain Avenue intersects with Alvarado Canyon Road in the commercial zone south of Interstate 8, and the surrounding blocks house auto shops, electrical contractors, and building supply distributors that form Grantville's trades-and-industrial district. Coast Parts operates as a multi-location distributor with its San Diego branch serving the county market, and the company's inventory management system cross-references model numbers to part numbers for fast counter lookup. Delivery service extends the counter's reach to repair technicians on active service calls who need a part shipped to a job site rather than making a warehouse run. The parts counter staff assists DIY homeowners with part identification by model and serial number, a service that requires the same OEM database access that trade technicians use. Insulation and attic ventilation components overlap with the appliance supply chain, and home performance contractors such as Attic Construction in College Area source related building envelope materials through the same Grantville supply corridor. Coast Appliance accepts walk-in purchases with no minimum order and stocks high-turnover parts for immediate pickup.