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mark houghton's Avatar
 
Join Date: Jul 2008
Location: Central Washington State
Posts: 3,775
Quote:
Originally Posted by 87 930 View Post
Paul,
This is where I got my switches; "onlinecomponents.com". 1220 Olympic Blvd, Santa Monica, Ca., 90404. Fone=414-371-1500. Fax=414-365-3288.
Part number is "831330C1LR". Mfgr. is Crouzet-Schneider. I think that you have to buy a minimum of ten but the switch is only a couple of bucks each.
Good Luck,
The folks at Onlinecomponents.com must be members of this forum and saw a demand surge coming:

Pricing for 831330C1LR
Quantity Price
1 - 9 $6.31
10 - 24 $5.90
25 - 49 $5.46
50 - 99 $5.19
100 - 249 $4.90
250 + $4.64

What price are you willing to pay for heat? Priceless....
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 11-05-2010, 08:35 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #61 (permalink)
Wayah Road Warrior
 
Shadetree930's Avatar
 
Join Date: Jun 2002
Location: Greenville, SC
Posts: 1,556
Thanks so much for the detail. I can finally see the path forward for this repair. Gonna order a few of these and fire up a soldering iron.

Will report back once complete (or in the interim if I hit a speed bump).
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87 930 GP White (Sold)
87 911 Targa Guards Red(Sold)
Old 11-05-2010, 11:17 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #62 (permalink)
Wayah Road Warrior
 
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Join Date: Jun 2002
Location: Greenville, SC
Posts: 1,556
It Is Alive!



So I finally have my autoheat and footwell blowers working.

I ordered the micro-switches from Onlinecomponents.com (Thanks for the info Scott & Mark) and dove into this yet again.

Here are my findings.

There are two micro-switches mounted on the side of the autoheat control mechanism.



The inboard switch acts as a limit switch. It stops the servo motor when the contact is fully depressed. Wired as shown ...



The outboard switch completes the footwell blower circuit when the contact is fully depressed. Wired as shown ...



I tested each OE switch with a multimeter. The inboard switch was good. The outboard switch failed to complete a circuit in the fully depressed mode.

Ah Ha!

I replaced the outboard microswitch and retested ... Whirrrrrrrrrrrr ... the footwell blowers sprang to life!

I buttoned up everything and sat in the driver's seat to admire my handiwork.

When I reached down and turned the rotary knob to hear the satisfying siren's song of my blowers ..... I got ... silence.

Hmmm. Not what I was expecting. So I tore everything apart to see what I may have missed.

Long story short, the electrical work was done correctly. However for some reason unknown to me, the servo 'fulcrum' was not depressing the new microswitch contact fully enough to clomplete the circuit.

I did some McGuyvering to the fulcrum to fix the problem. I used a screwdriver to expand the gap in the fulcrum by maybe 2mm (at the point indicated in the pic below), moving it closer to the microswitch contact.



Autoheat problem is now solved.

Thank you all for your contributions.
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02 996tt White
87 930 GP White (Sold)
87 911 Targa Guards Red(Sold)

Last edited by Shadetree930; 11-19-2010 at 07:01 PM..
Old 11-14-2010, 11:24 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #63 (permalink)
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Join Date: Nov 2006
Location: Vancouver, BC Canada
Posts: 255
Heat for the fall! Far out Paul good on ya.

I have had mine all apart before too and the control unit checked out fine. The issue that I found was that the temperature sensor was too covered in dust and debris. This is the round vent looking thing to the right of the steering column.



There is a small fan behind the grill to move cabin air across the sensor. After cleaning cabin temp actually cycled like it was supposed to. With the age of the cars this would be a good thing to check.
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88 930 blk/gry
Old 11-14-2010, 01:05 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #64 (permalink)
Wayah Road Warrior
 
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Join Date: Jun 2002
Location: Greenville, SC
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Do you need the knob for the outside air fan lever? I have spare knob but would have to check to see if it is that particular one.
Old 11-14-2010, 01:38 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #65 (permalink)
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Location: Vancouver, BC Canada
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Thanks for the offer Paul. Since the picture was taken I purchased some knobs. Enjoy the heat!
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88 930 blk/gry
Old 11-14-2010, 06:25 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #66 (permalink)
 
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Join Date: Jun 2011
Location: Chagrin Falls, Ohio
Posts: 652
I've been troubleshooting my autoheat system for about a week now. The prices for replacement components is unbelievable and worse yet may not be available. i found that my heat duct sensor (external) has failed open. I had a supplier tell me that the sensor would be over $600...if they could even get it!
Old 09-16-2011, 08:01 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #67 (permalink)
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