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Cold Defrost and warm engine on 2007 Ford Ranger

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
During my work commute the engine temp reads to the middle but the defrost air comes out cold. a week ago I took it to JiffyLube and they did replace the air filter. Could a small hose not be connected? Thanks!
(1) Answer
do you have hot air anywhere in the car. if you get it on the floor and dash vents tht would leave to believe that you have a diffuser motor out or the diffuser box door has come loose or jammed