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My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
With a dim display this may be an issue with a loose or corroded or damaged ground at the area where the ac was serviced.I would ask if they can re check their work that was done when the ac was serviced to see if they can locate any issues needing repaired.If no wiring issues are found I suspect the display may have failed on its own when they were working on your vehicle here and would need replaced unfortunately.You might check with other repair centers to see if you can locate one that can replace this cheaper.
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