andrew911

I am told I need to get part number 99365904701CJH for my 964- the climate control unit. I have seen these units for the 993 listed as 99365904700CSH. What is the difference- does the 01 vs 00 in the 10 and 11th number make the 993 part compatable with the 964? The original number for the 964 part was 964659047001DB- is the 99365904701CJH a replacement/update part for the original part?

This part is very expensive- please help if you have access to the Porshce parts system. The Porsche dealer is letting me get this part if I can on my own due to the cost (>$1,300 through Porsche!!!)

Thanks!-
Andrew

alan911sc

I have a used unit pn 964 659 047 00 5HB 005 716-00 if it's of any interest to you. Reasonable. Private Message or e-mail me alan911sc@aol.com.

mojorizing

Ouch!
I'm not sure of the compatiblity of those parts, but Vertex has them listed as $975 for either one. You might call them to confirm interchange-able.

You can buy a lot of batteries for a grand, Andrew, if you get my meaning.

Is it possible for another 964 owner in your area to exchange CCU to be sure this is the problem?

Do you want a copy of PET CD and Workshop Manuals on CD? Give me an email.

Kevin

Robert Coats

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by andrew911:
<strong>I am told I need to get part number 99365904701CJH for my 964- the climate control unit.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">The previous owner of my '91 C4 had to get the "Climate Controller" replaced back in 2000, and according to the work order, they used part number 993-659-047-00-CJH. It works great! I have seen then on <a href="http://www.ebaymotors.com" target="_blank">www.ebaymotors.com</a> from time to time, listed as "CCU."

I discovered this had been done not by digging through the service records, but when I noticed the instructions and picture of the system in the owner's manual looked different from my car. After a bit of research, I realized I had a 993 controller. The only difference is the 964 controller has a single compressor button, but the 993 has two. One works just like the 964 (engages the compressor) but the other is a "maximum cool" button. It does the following when pressed:

-Sets fan to HIGH
-Engages the compressor
-Sets airflow to dashboard vents only
-Engages the recirculate circuit (door closes)
-Sets temp to "blue dot"
-Disables all the above individual controls

I like this extra button, since I only have to press it to get maximum cooling. I then switch it off, and turn on the regular compressor button and all controls return to their previous settings.

Hope this helps...

andrew911

Thanks for the quick input!

mojorizing- vertex is the company I am dealing with to get the part myself instead of through the dealer (they always seem to have the best prices)- they are trying to get me the part- should also be less than the advertised price of $975 (boy I seem happier than I should be about that)!

allan911sc- I'm going to see if I can get a new one first since it seems to be less than $975- thanks for the offer. These things seem to go bad after a while, so a used one may not be worth it for me. Also, it appears that the 993 ID# may have something updated in it, possibly to make it more reliable, so I'm still researching the 993 unit.

Robert- you are correct- the 993 version has two "snowflakes" for the A/C. The mechanic at the dealer tried what I believe was a 993 climate control in there, it didn't work right, they e-mailed Porsche and Porsche gave them the same number unit to get, with the exception that the part code has one number and three letters difference. If you really have the unit with "00" in the 10th and 11th diget space and it works, then that is worrysome to me as it seems something else is wrong with my car. Are you sure your unit isn't "01" in those spaces in the part #? Thank you for your input- I will try to talk to someone tomorrow using your car as an example if you can verify the "00" (if the mechanics are even there on Saturday).

Randall G.

With respect to US models:

-Part #964-659-047-00 fits an '89-90 964. It was first superseded by 964-659-047-01. This model was subsequently superseded by 993-659-047-00
-964-659-047-01 originally fit a '91-4 964. When used in an earlier 964, G1 is to be jumpered to G19 in the wiring harness. This model has been superseded by 993-659-047-00. This is the only CCU you can buy new from Porsche for US 964s. When used in an '89-90 964, G1 to G19 must be jumpered.
-Porsche no longer sells a 964 prefix CCU.
-993-659-047-01 is the part number for a 993. The only difference between the 964 and 993 CCU part numbers is the suffix (00 for a 964, 01 for a 993).
-There were several changes in the HVAC system when the 993 was introduced. I don't know if a 993 CCU (suffix = 01) will work in a 964.

If you're looking for a good price on a new CCU, try either Hendrick Porsche, Sunset Porsche or perhaps Reeves Import Motorcars. About a year and a half ago, Hendrick sold me a new CCU for dealer cost = $760. Sunset has a fabulous Excellence magazine special = cost + 15%. Kenn Young is now the parts manager for Reeves, used to be the parts manager for Hendrick.

Best of luck!

Randall G.

Hi Andrew,

You may be figuring out about now that Bob C. has the correct CCU for a 964. Besides what's in PET, it's what is installed in my own car (pic below). It appears that the person who gave you the part number mixed up the suffixes.

<img src="http://members.rennlist.com/rgranaas/CCU%20Top.JPG" alt=" - " />

Robert Coats

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by andrew911:
<strong>Robert- [snip]If you really have the unit with "00" in the 10th and 11th diget space and it works, then that is worrysome to me as it seems something else is wrong with my car. Are you sure your unit isn't "01" in those spaces in the part #?</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">I can't say for absolute sure what is installed in my car is an "00" or "01" part, but I have to think since "00" is on the work order, then "00" is on the part.

If I understand what Randall has written:

<strong>
When used in an '89-90 964, G1 to G19 must be jumpered.</strong>

This may be part of your problem, if you have an '89 or '90?

andrew911

Guys- I can't thank you enough. The service department is open tomorrow (who knows if any mechanics are there though)- I will attempt to straighten this out. Seems the "00" part is the right one from your posts and experiences.

I believe they had a 993..."00" unit in my car the other day to test it- I know it had 993 as the first three numbers because I saw it, and they are telling me they have to order the "01" so that must have been an "00", unless they are confused. Since everything is apart, I will have them test whatever they have ("00" or "01") in front of me tomorrow if possible.

I don't like getting ripped off, and the quote of $1,330 for part and $500 labor ($1,800 total) for diagnostic and install I got me fired up today. Especially as when I took my car in for a draining battery I narrowed the problem down to fuse 1 and told them that's where the draw was...how long does it take to determine if the unit is good or bad, and how long can it take to remove and plug in a new unit- even a radio installation isn't $500 and that appears more complicated than this...

Thanks again for all your help, and I'll report back. By the way, my car is a 1993.

Andrew

Randall G.

Hey guys,

I was a bit brief with the G1-G19 jumper. What happens if it's not installed, per the shop manual:

"If the jumper is missing, a fault (Fault Code 46 and 47) on the missing left-hand rear blower is detected and the left-hand blower will therefore operate at reduced speed while the blower is on."

I believe the CCU change in '91 was made in support of the Turbo, with its two rear blowers.

FWIW, I know of at least one person who says he is running a later model CCU in his '90 Cab, sans G1-G19 jumper. He says his heat works fine, but I suspect his rear blower won't operate in fast-speed.

JasonAndreas

For $1330 I would look into having your current unit repaired. We are talking about a very simple piece of hardware. At the very least it doesn't hurt to ask around.

John Miles

If you are sure that a faulty unit is the cause of your problems then definitely look at getting it repaired.
Mine was replaced my a 993 unit and my particular fault went away, but operation was weird till I put the mod on.

I am now having the old 964 unit repaired by Accinis in Italy. 250 Euro fixed price and he will guarantee for a year. Unit not back yet so watch this space.

For info on a previous repair check out Carlo's report on <a href="http://www,porsche964.co.uk" target="_blank">My 964 Site</a> -&gt;Technical-&gt;Electrical section. Link to Accinis is there. They will ship worldwide.

<img src="http://www.porsche964.co.uk/technical/images/carlo/repaired2.jpg" alt=" - " />

Good Luck,

John

John Miles

Andrew,
I have just spotted that you core problem was battery drain and you diagnosed the CCU as faulty via fuse pull.

BUT...
How long did you wait to see if the CCU switches off. It can take up to 45 minutes! Up until then it will draw around 300ma and then drop to 30ma odd.
Did you wait 45 mins?

As you will know from this list, battery drain is very common and I don't think it is hardly ever the CCU.

John
J

andrew911

John- the tiny fan in the climate control panel was staying on after I turned the car off without turning off. Once I noticed the fan was staying on, I turned off the car and came back about 3 hours later, and the tiny fan was still on (because some people said it could stay on for 20 minutes after car shutoff, I wanted to be sure this thing was running all the time).

When I plugged in the Porsche battery maintainer in the past, the red charging light would stay on all the time. After pulling fuse 1 (because I knew that little fan was staying on), the charger was able to fully charge the battery after a few hours, and the red charging light turned off indicating a full charge.

I agree with you that the unit may not be the problem, but this is what the dealer told me, thus that's what I was going with at this point. They could just be after my money though, and I'm trying to be careful with this.

John- What was weird about your 993 unit in your car, and what mod did you do to it? Also, can you e-mail me Carol's e-mail address (if you don't think he would mind me e-mailing a question about that servo motor)-

Thanks-
Andrew

Fred, Long Island

The shop that rebuilt my DME advises that they can repair any CCU from a 964.
<a href="http://www.ottosvenice.com" target="_blank">www.ottosvenice.com</a>