The coils in your air conditioner are responsible for the exchange of heat to keep your home comfortable during our long, hot Fresno cooling season. The evaporator coil, which is located inside your indoor air handler, absorbs heat from the air in your home. The condenser coil, located in the outdoor condensing/compressor unit, expels the heat outside. Over time, dirt and grime build up on your coils and prevents the optimum exchange of heat, resulting in your system working overtime to keep you cool. This can raise your utility bills and reduce the life of your system.