Blue964 Posted 12February, 2021 Report Share Posted 12February, 2021 G'day boys and girls, I've got some problems with the CCU on one of my 993s. Looking for someone in Aust that repairs these. Any suggestions? I know there are folks OS that repair these, but I want someone in Aust if they exist. Cheers all. Quote Link to comment Share on other sites More sharing options...
Peter M Posted 12February, 2021 Report Share Posted 12February, 2021 BERGVILL F/X I guess you have found this website? If you can't find a local, I highly recommend Tore. Blue964 1 Quote Link to comment Share on other sites More sharing options...
Blue964 Posted 12February, 2021 Author Report Share Posted 12February, 2021 8 minutes ago, Peter M said: BERGVILL F/X I guess you have found this website? If you can't find a local, I highly recommend Tore. Thx Peter. He is my fall back position, but was hoping for local--which I know is a stretch. Quote Link to comment Share on other sites More sharing options...
WB997.2GTS Posted 12February, 2021 Report Share Posted 12February, 2021 ECUdoctor in Miami USA repaired my ECU & alarm modules and they also repair the AC controller. What problems are you experiencing? Warren Quote Link to comment Share on other sites More sharing options...
Blue964 Posted 12February, 2021 Author Report Share Posted 12February, 2021 23 minutes ago, WB997.2GTS said: ECUdoctor in Miami USA repaired my ECU & alarm modules and they also repair the AC controller. What problems are you experiencing? Warren No fans, no control over hot/cold air, basically it is doing nothing. What was your experience with ECU doc like--turnaround time? Quote Link to comment Share on other sites More sharing options...
WB997.2GTS Posted 12February, 2021 Report Share Posted 12February, 2021 12 hours ago, Blue964 said: No fans, no control over hot/cold air, basically it is doing nothing. What was your experience with ECU doc like--turnaround time? Turnaround time Sydney>Miami>Sydney was 1 month, considering the amount of corrosion that had to be removed from ECU & alarm, central locking modules. They also removed the drive/block function from the ECU, programmed a new key and supplied a modified DME relay. I recently saw one of their videos where they displayed a new modern PCB that they use in the CCU units upgrading a 30yr design. Torv at Bergvill is also very good and will answer questions promptly although I understand he only repairs CCU units. I recently purchased his LED kit, HID lightning kit & basket handle LED upgrade, they arrived in 6 days. Blue964 1 Quote Link to comment Share on other sites More sharing options...
Big Dav Posted 13February, 2021 Report Share Posted 13February, 2021 Injectronics in Melbourne would be able to do it. https://injectronics.com.au/register-a-repair/details/climate-control-module/744 Last time I checked (a few years ago) you couldn't send the unit directly to them you had to go through an agent like a Repco store Blue964 1 Quote Link to comment Share on other sites More sharing options...
Blue964 Posted 15February, 2021 Author Report Share Posted 15February, 2021 thanks for the feedback, guys 👍 Quote Link to comment Share on other sites More sharing options...
Peter M Posted 16February, 2021 Report Share Posted 16February, 2021 11 hours ago, Blue964 said: thanks for the feedback, guys 👍 Will be interested to hear how you get on. Blue964 1 Quote Link to comment Share on other sites More sharing options...
Blue964 Posted 17February, 2021 Author Report Share Posted 17February, 2021 22 hours ago, Peter M said: Will be interested to hear how you get on. The checklist available from ECU doc is a great starting point--thanks @WB997.2GTS. There are a few checks in the checklist I'm going to do first to 100% confirm it is not something in the HVAC external to the CCU causing the issues. Peter M 1 Quote Link to comment Share on other sites More sharing options...
Blue964 Posted 19February, 2021 Author Report Share Posted 19February, 2021 Think I may have found my problem...if the rear blower isn't working then the CCU shuts all other fans down. Pulled the rear blower relay out and jumped two pins--hey presto, the rear blower comes alive (in fast speed) and sure enough the front blowers also fire up. Then go to test the rear blower in slow speed by jumping two other pins and nothing. So it would appear the resistor/thermo-switch is dead. Sure enough I pull the resistor out and test it with an ohm meter and sure enough it's an open circuit. But wait a minute the thermo-switch hasn't tripped so it shouldn't be an open circuit. A little more investigation and it would appear I have a questionable copper rivet. Give the copper rivet a little tap with a center punch and all is good--the resister now has the resistance it should have to kick in the low speed blower. I'm off to re-install the blower resistor and see if that brings things back to life, or maybe highlight more bloody problems in the HVAC. Just ordered a new blower resistor so my "reconditioned" resistor will do as a temporary measure. Fingers crossed I get out of this with a $25 new resistor. YellowDieselGolf and Peter M 2 Quote Link to comment Share on other sites More sharing options...
Blue964 Posted 19February, 2021 Author Report Share Posted 19February, 2021 Well if only life was that easy...i've now got a functioning rear blower but that has now highlighted more issues. Oh well, back to more investigations Quote Link to comment Share on other sites More sharing options...
Blue964 Posted 20February, 2021 Author Report Share Posted 20February, 2021 Well, managed to work out a few more issues with my HVAC--a faulty rear blower relay and a blown fuse caused by the relay. Put in a good relay and new fuse and I now have a fully functioning CCU and HVAC. Happy days. Peter M, firstone, Merv and 1 other 4 Quote Link to comment Share on other sites More sharing options...
Blue964 Posted 20February, 2021 Author Report Share Posted 20February, 2021 Just a quick follow-up, I knew absolutely nothing about 993 HVAC a few weeks ago, but I found the following two on-line resources incredibly simple and useful in diagnosing and fixing a dead HVAC: https://www.bergvillfx.com/categories/964993-hvac-system-details and https://cdn.shopify.com/s/files/1/2574/6768/files/Porsche-964-993-HVAC-CCU-Troubleshooting-Guide-Testing-Procedure-Complete.pdf?15803118210647334672 So if you have a 993 (or a 964) with a dead HVAC then you might like to go through these guides if you want to save yourself a few dollars by fixing it yourself. Merv and Zelrik911 2 Quote Link to comment Share on other sites More sharing options...
Blue964 Posted 21February, 2021 Author Report Share Posted 21February, 2021 The CCU fan on my unit was very noisy and I was about to purchase a replacement at over $200!!! That was until I found this YouTube clip...gave my CCU fan the same TLC and now it's whisper quiet and good as new. Russ, Merv and tomo 3 Quote Link to comment Share on other sites More sharing options...
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