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A/C Control Unit not lighting up

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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHA/C Control Unit not lighting up

1 matching discussions were examined; no attributable action/outcome evidence was detected. No consensus or repair conclusion is claimed.

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1 matching discussions · 2 captured posts examined · 0 partial discussions

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Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261027T005001Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I am in the process of having my '00 996 rebuilt. Among the parts that were missing was the A/C control unit. I managed to find one on ebay for a decent price, but when it was installed and the car hooked up to a battery, the control unit didn't light up. All the functions seemed to work, the fan speed buttons, etc. just no display. When I wrote the seller he told me that the control unit needed to be "version coded" to my car and this needed to be done by a dealership with a special computer. Can anyone verify?

POST 2 / ORIGINAL POSTEROriginal post

I called my local dealer to see whether they could verify the validity. They said that they do have a computer that can "version code" the unit to a specific model, but it will cost me $100 to do and they can't guarantee that that is the problem with the unit. I am somewhat hesitant because the functions all work, just the LCD doesn't. Before I invest the money to find, I would appreciate it if anyone has more insight.

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