Hello group,
my quick question is: does an F150 using the EATC heater control head also utilize a blend door? My '02 is blowing a/c through the defrost and I am ready to tackle the solenoid o-ring fix. While I am in there, I thought I would check the blend door operation, if there is one. Everything I see online indicates that the blend door is used with the 3-**** manual control head. Thanks in advance.

Also, there is some ambiguity as to the size of the replacement o-rings...#007 or #008? Dimensions also appreciated!