uswrnk54

Is there a way to set and keep the climate control on manual? I've set mine to 70 and every time I get in the car the fan turns on full blast in an effort to achieve 70 degrees. It's annoying.

Also, part of the LCD screen is burnt out. Is there a more cost effective way of fixing this other than replacing the $600+ unit, or buying a used one that likely has the same problem?

Thank you.

wwest

The problem I have with the RX300 and LS400 is that I have to manually interact with the climate control if I need/want to warm the cabin up to a comfort level within a decent period. No happy medium I guess.....

I haven't taken note of this in my '01 C4 except in a defrost/defog/demist mode but then it mostly sits quietly in the garage this time of year. But then it also has a modification, switch on the backside of the glove box wall, to diable the A/C compressor unless actually cooling is needed.

WalterRohrl

Just hit the fan speed switch, it should say "Manuell" on the right hand screen.
Until you select "auto" again, it will stay in Manual mode. Easy.

The same system was used in Audi's way back, most people think the A4 was the first one, actually it was back in '92 on the 100. My old '93 S4 had the same screen as the 996, buttons around it were shaped slightly different, other than that identical. The screens generally have a long life, actually I don't think I have seen many with bad screens so a used unit from another 986/996 would most likely be fine, just make sure the finish is the same - 996.1 vs 996.2

Dharn55

Here is a link for a repair kit for the LCD:

http://www.modulemaster.com/en/servi...e_lcd_kit.html

Not a real difficult DIY.

For Wwest, why do you need a switch in the glovebox, there is a button on the climate control that turns off the AC.

One function I wish the control did have is to turn off and stay off when the car is restarted. If you lower the fan speed until the system turns off, the next time the car is started the system goes on at the lowest fan speed. Having a cab in the summer I would like to be able to turn the system off and have is stay off until I want to turn it on.

uswrnk54

Dharn55- Awesome!

perryinva

Bleeding failed LCDs are actually pretty common. The replacement kit spells "Manual" correctly. +1 easy to do, just take your time. Also confused by wwests mod..why?

wwest

The A/C stays OFF until/unless I turn it on...!!

Next summer.....

But I also need a switch to keep the windshield from being cooled, or even chilled (defrost/defog/demist duct CLOSED), during the summer. As it is currently I must remember to turn it off manually.

Sneaky Pete

^^^^really confused^^^^

Imo000

Why is the word "manual" mispelled?

babylonboots

Here's some information I picked up when I first got my 996 for the climate control unit.

"Porsche AC Diagnostics
(undocumented, unsupported feature)

To switch from F to C:
Hold down the recirculating button then push both the temperature + - buttons.

To access diagnostics:
Hold down the Recirculating & Air up buttons for 5 seconds. The + - buttons go up and down through the list of "c" codes. The center vent button switches the left display between the "c" code and its actual value. Press the Auto button to exit.

I have yet to verify all these, this info was copied from wonderful people on PPBB!
Here is a list of what can be seen:

0c - ERL
1c - Oil Temp?
2c - Inside temp. Sensor mounted in the aspirator assembly at the side of the dash.
3c - Outside temp. Sensor located inside the air inlet of the A/C unit.
4c - Outside temp. Sensor located in front grill of the radiator. The data is fed to the Climatronic from the instrument cluster. When not moving, the instrument cluster OBC temp display retains it's last setting until moving. This is to prevent heat emanating from the radiator affecting the temperature sensor. The A/C unit uses the lower of the two outside air temp values in determining fresh-air temp.
5c - Outside temp. (matches OBC outside temp display)
6c - Coolant temp.
7c - Footwell discharge temp.
8c - Sun sensor (dash top)
9c - Sun sensor.
10c - Passenger compartment fan speed.
11c - Passenger compartment fan voltage.
12c - Temperature mix Flap command 1=COLD, 100=HOT
13c - Temperature mix Flap position
14c - Central Flap command
15c - Central Flap position
16c - Footwell/Defrost Flap command
17c - Footwell/Defrost Flap position
18c - Recirculation Valve command 1=OFF, 100=RECIRC
19c - Recirculation Valve position (feedback)
20c - Vehicle speed in kph, updating only once per second. (real speed, not speed+safety margin as in the speedometer)
21c - Engine RPM in hundreds. This too only updates once per second.
22c - ?
23c - ?
24c - Sun sensor, exterior lights switch & panel lights control (term. 58 & 58d voltage) - used for A/C panel display illum.
25c - ?
26c - ?
27c - ?
28c - Fan speed?
29c - ?
30c - Engine run time in seconds (255 max.)(=0xff)
31c - Timing counter
32c - Displays test
33c - Software version? Mine states 3.4
34c - ?
35c - Outside temp. from inlet sensor (filtered?)
36c - temp?

frisbee91

Update for posterity:
If you want the original factory look. I'd highly recommend this...
http://shop.914rubber.com/LCD-Produc...m1plqscsfapp06

The guy at 914Rubber.com makes replicas of the original LCD displays. They are perfect, I have one in my car. (which is why I have a spare Audi display)