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Discussion Starter #1
My 2004 Navi works fine. Fixed by Alpine US. I thought I would change fan mode and speed now that it is kind of warming up. To my surprise on the touchscreen AC/Info the outside temp screen shows no temperature and the fan speed settings and AC settings greyed out. When I checked the diagnostics everything connected the Navi ECU is green except the Air-Con section which is red. However if I use the manual buttons to set to Auto and set the temp to LO, the air comes ice cold so apparently the AC works but only on the physical button and on full auto. However the settings on the touchscreen are all greyed out. Any idea what is wrong and what to check? Thanks
 

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Discussion Starter #2
Has anyone encountered this before? I have been told it COULD be the climate control unit, but I don't want to guess. My mechanic has never seen this before. I actually did some searching on the internet and a few people have posted similar issues but in every case, there was no resolution.
 
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