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Message: [QUOTE="BigRed97, post: 1474243, member: 1979"] There's a SSM to update the hvac module calibration. Not sure if it'll address what you're talking about but worth a 46514 - 2014-2016 F-Super Duty - 6.7L - Intermittent Lack Of Air Conditioning (A/C) Perf Some F-Super Duty vehicles equipped with a 6.7L engine may exhibit intermittent lack of A/C performance. If root cause for lack of performance is diagnosed to b e caused by the air inlet mode door remaining in mid travel position, it may be due to the heating ventilation air conditioning (HVAC) module not completing the initial key on self test of the actuator. To correct this condition, reprogram the HVAC module to the latest calibration using IDS release 104.04 or higher. Ma ke sure you are connected to the internet when entering module programming to ob tain the latest updates. [/QUOTE]

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