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Planet-9

2010 987 - Climate control - Recirc and AC- separate function

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YOUR RESEARCH2010 987 - Climate control - Recirc and AC- separate function

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Replace easily, chime in

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Suggestion

if anyone knows if the ECU logic can be changed easily, chime in.

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2010 987 - Climate control - Recirc and AC- separate function
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Leading evidence: 'Replace easily, chime in' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace easily, chime in' (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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Run recirc

Suggestion or failed attempt

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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.

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Suggestion

So I guess running Recirc with AC makes sense in most circumstances.

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2010 987 - Climate control - Recirc and AC- separate function
Frequently discussed actions (2)

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Replace easily, chime in

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

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Suggestion

if anyone knows if the ECU logic can be changed easily, chime in.

Original post Read captured discussion
2010 987 - Climate control - Recirc and AC- separate function

Run recirc

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

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Suggestion

So I guess running Recirc with AC makes sense in most circumstances.

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2010 987 - Climate control - Recirc and AC- separate function
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POST 1Original post

On my 2010 987 with the base climate control the recirc function automatically turns on AC and if AC is then disabled, recirc will time out after a few minutes. I am fairly certain this is by design (like many cars I’ve been in), and I think it’s very silly. I want control over the functions independent and indefinitely. Is this possible to program and separate and remove the time out of recirc? Does this annoy anyone else? My Chevy trucks force AC when in recirc with no option to turn off AC. BMW has it right. Complete manual and independent control with no BS. Any help?

POST 3Original post

I've had my 2010 Cayman for almost 10 yrs and I just now noticed this quirk. I was waiting for parts (had a noisy AC pulley bearing) and had the hub to the compressor shaft disconnected. I had the AC switched off (since it wasn't functional). So the car was still drive-able. It was getting stuffy inside the cockpit, so I switched Recirc ON and noticed the AC light came ON also. So I switched AC OFF. Since I had been working on the AC compressor, I hoped I didn't cause this behavior. I've only been on short drives, so I haven't notice a timeout. Will keep an eye on it (AC compressor pulley is now replaced and AC fully functional). Thinking about your issue, I guess they assume re-circ closed could cause increased cabin humidity possibly causing window fogging regardless of ambient temperature. So I guess running Recirc with AC makes sense in most circumstances. Summer and winter. I doubt changing this behavior would be easy since it is likely embedded in the controller logic, rather than the switch itself.

POST 4Original post

I understand why they do it. Because some people would fog up their windows and create an unsafe situation. But I can definitely manage to push the AC button or recirc button myself. I figured it wouldn’t be easy. In my Chevy truck I think I may add a separate aftermarket circuit and button or switch that controls the recirc door separate from HVAC controller (basically overriding it’s logic). Not sure I’d be willing to the same on the 987. if anyone knows if the ECU logic can be changed easily, chime in. I won’t be holding my breath.

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