Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

A/C not coming on (1999 996)


Recommended Posts

My 1999 996 has 69,500 miles. In the last few weeks, I've had a problem with the AC fan not starting when I crank the car. Usually if I turn the car off and turn it back on, the fan will start up. Sometimes, it takes two off/on cycles. This morning, the wipers AND the AC didn't come on until I shut off and re-cranked the car. Turning the climate control system on and off doesn't fix the problem.

Anyone have any ideas what would be causing this?

Link to comment
Share on other sites

My 1999 996 has 69,500 miles. In the last few weeks, I've had a problem with the AC fan not starting when I crank the car. Usually if I turn the car off and turn it back on, the fan will start up. Sometimes, it takes two off/on cycles. This morning, the wipers AND the AC didn't come on until I shut off and re-cranked the car. Turning the climate control system on and off doesn't fix the problem.

Anyone have any ideas what would be causing this?

Sounds a lot like your ignition switch, very common on the 1999. There is good and bad news for you, first the bad news, If it is the ignition switch (I'm willing to bet money it is) Porsche no longer makes that part and has made everyone with this problem at the dealer swap out for a whole new ignition system.

The great news is the part is the same at VW and Audi.

use this link for much more information.

http://www.renntech.org/forums/index.php?showtopic=1313

I will email you the instructions also. I was able to do the job in about 15min.

The switch can easily be found on ebay for $20.00. If you are handy enough, its easy.

Hope thats it, It should be.

Link to comment
Share on other sites

My 1999 996 has 69,500 miles. In the last few weeks, I've had a problem with the AC fan not starting when I crank the car. Usually if I turn the car off and turn it back on, the fan will start up. Sometimes, it takes two off/on cycles. This morning, the wipers AND the AC didn't come on until I shut off and re-cranked the car. Turning the climate control system on and off doesn't fix the problem.

Anyone have any ideas what would be causing this?

Sounds a lot like your ignition switch, very common on the 1999. There is good and bad news for you, first the bad news, If it is the ignition switch (I'm willing to bet money it is) Porsche no longer makes that part and has made everyone with this problem at the dealer swap out for a whole new ignition system.

The great news is the part is the same at VW and Audi.

use this link for much more information.

http://www.renntech.org/forums/index.php?showtopic=1313

I will email you the instructions also. I was able to do the job in about 15min.

The switch can easily be found on ebay for $20.00. If you are handy enough, its easy.

Hope thats it, It should be.

You have mail!! ( the instructions)

Link to comment
Share on other sites

  • 2 weeks later...

A lot of times when this problem happens (ignition switch not returning causing the ac to be inop) you can get by without a new switch. After you start the car just gently move the key towards off. A lot of times thats enough to get the switch to return from "start" to "on" and the AC will work again.

Link to comment
Share on other sites

  • 11 years later...

The A/C Blower in my 2000 996 C4  has stopped working. It started a month or so back by working intermittently. After starting the car the blower would come on after a minute or so. That went on for a couple of weeks and then it stopped altogether, I read everything I could find and did the following:

  1. Bench tested the blower -- ok
  2. replaced the resistor -- worked initially but failed quickly
  3. Checked the battery -- ok
  4. Read about the ignition issue -- started wiggling the key between position 0 and start. That got it going although not consistently.
  5. Replaced the ignition... still does not work.
  6. Put a meter on the fan connector and started the car... slight jump in voltage (like 1 vDC) 
  7. Bench tested the blower motor again -- still good.

I really don't know where to go from here. Any help will be greatly appreciated... 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.