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When I start car a/c controls (lights) go crazy flashing and temp number disappears. Controls may or may not go back to normal in a little while. System seems to work ok ?? Relay or sensor problem ??
From what i understand they are loose connections. In the past (when I have my stereo out) I pull (try to clean), and reseat the plugs in the back.
However, today i noticed it happening again, but tapping on the digital read out resolved the problem, which makes me think the issue is a loose connection internally.
I'll mess with it more when I get a chance, but if someone else has any fix it ideas they would be appreciated.