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'98 986 Heater ac control panel has no power - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCH'98 986 Heater ac control panel has no power - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Disconnect battery

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
Did you disconnect the battery before charging it?
Original post Read captured discussion
'98 986 Heater ac control panel has no power - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Suggestion
You should always disconnect the battery before charging.
Original post Read captured discussion
'98 986 Heater ac control panel has no power - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Disconnect battery' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect battery' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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1 matching discussions · 5 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Disconnect battery

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
Did you disconnect the battery before charging it?
Original post Read captured discussion
'98 986 Heater ac control panel has no power - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Suggestion
You should always disconnect the battery before charging.
Original post Read captured discussion
'98 986 Heater ac control panel has no power - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Coverage and how to read this overview

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.

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

986Forum: 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: 20261027T060112Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Everything worked [but the horn] after purchase and a 100 miles. The car sat for 6 or 8 days and the battery went dead. I charged the batt and drove some but noticed, then, that no switch on the control panel worked. Fuses D-6, E-7 okay and relay 18 too. I changed out relay 18 and relay 9 and still no response from any switch button pressing.

POST 2Original post

Did you disconnect the battery before charging it?

POST 3 / ORIGINAL POSTEROriginal post

Battery was not disconnected from the car. Battery charged only long enough for me to start the car

POST 4Original post

Line surge or charger error probably killed it. You should always disconnect the battery before charging. I also will not use a maintainer that is hooked up with the battery connected, but that's just me. 99.9% of the time, there will be no problem. However, it is possible to fry sensitive electronics in your car anytime you connect something to it that is powered by AC. You'll likely have to replace it.

POST 5 / ORIGINAL POSTEROriginal post

Sadly, that appears to be the case. I have two 911's; the youngest is 42 years old. With those, there hasn't been a problem I couldn't solve/fix. This 986 is new to me; lesson learned. (Made a shop appointment already). Thank you!

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