TechSmart HVAC Temperature Blend Door Actuator (F04002) All TechSmart HVAC air door actuators are guaranteed to meet or exceed OE performance providing today's technician with the quality parts needed to get the job done right, the first time TechSmart F04002 temperature blend door motors and air door actuators are designed with chamfered pins to ensure an OE quality connector fit, making the install easier for the technician while reducing the risk of bent or broken connector terminals