richardmoist

This is part number 964 624 324 00. Does any one out there know where to get this part for a resonable amount of money?

Laker

Sonnen (no affiliation) has them for $341.

On Friday night, I took mine out, cracked it open and tested just the motor with a 12V supply and it worked fine.
There are these "spring" contacts which move along the printed circuit board as the arm swings through it's arc. The contact points were black. The contacts and pcb just needed a 10 second rub of emery cloth to clean the contacts.
full DYI (note section 10)
Total time - about an hour.

richardmoist

Thanks.....I have done most of that....will work for two or three passes then won't work. So I am lossing contact some where. Very good instructions and pictures....will keep at it.....Thanks again!

Laker

I also had to bend the contacts inside the slots where the actual motor leads slides into to ensure 100% contact. The good news is that yours kinda works, so you just have to track down the break.

altarchsa

If you don't mind, what symptom were you experiencing from this motor not working. I'm interested because I have no temperature fine control - it's either full cold on blue dot or full heat off the blue dot. I was wondering if this motor was the problem. I had a spare used CCU and tried all combinations of replacing the entire unit and swapping circuit boards between the two and get the same result, which makes me think it's this damper motor.

Laker

My symptom was hot air on the passenger side regardless of what temperature setting I had. The servo was stuck with the flap open. No wonder the A/C couldn't keep up Any codes on the Hammer/ScanTool?

Click Here

jimq

I got mine used from Oklahoma foreign for a decent price and they have worked perfect for the past 2 winters. I did the cleaning trick 3 or 4 times and they only worked a few days each time.

tbennett017

The actual circuit board wears out from the rotating contacts. Electrically, what happens is that the CCU has fine control over the position of the flap. If you take one apart, remove the interstitial gears, then put the main gear/shaft back, you can manually rotate the shaft. You'll see on a meter that the position of the shaft returns a different resistance value (Ω) based on where it is. I am guessing that the CCU sends an order to the motor to turn and stops it when it gets to a pre-set resistance value. The three tiny contact points either wear into the board after 20 years, or on mine there was a kind of burn spot or electrically dead spot. The motor would invariably find that spot and get stuck.

If we could repair the board somehow we'd be golden... but not sure how to do that. Anyone have experience with circuit repair?

slips2

I have two spare servos, both part #964 624 325 00, removed from a 1990 C2. I can't reference this part number in PET.

Anyone know if these are updated servos? Perhaps the circuit boards are the same for refurbishing the #964 624 324 00 units ?

milutintin

I think the circuit boards are the same for all the servos.

Is there any chance of making those boards?

Bearclaw

Oklahoma Foreign had a couple a few months ago, they wanted $75 ea.
Unfortunately, I missed that train. They say now they don't have any. I recently bought one from an eBay seller for $169 shipped. They may have more in stock. LA Dismantlers said they have one for $220 shipped. Somebody would clean up rehabbing these.

Laker

Geez, at $220 used, I'd go new from Sonnen at $341

Bearclaw

It's in their "Collision Catalog"!!!
If a collision goes far enough to take out your mixer motor, ehhh, you got worse problems than the mixer motor.

Pretty magical that they still have new, high-attrition parts 3+ years after they were discontinued. I agree, if true, a new one would be preferable.
My experience with some of these outfits with the "unicorn" part, is that once you order, you immediately get an email saying, "Sorry, our catalog was in error" - or you pay, and wait a month to get a refund for the out-of-stock part.
Not saying for sure that would happen here. I know nothing about these people. Somebody would have to order to find out.

And yeah, that $220 price point is not at all surprising from LAD.

Laker

+1. I'm still waiting on two heated seat relays a month later from these guys.

jimq

wow 1 1/2 years ago i got 2 for $100 shipped from them.