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Old 12-30-2007, 03:37 PM
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Join Date: Nov 2007
Posts: 49
Originally Posted by ctaylor738 View Post
So after being distracted by the idle and mixture problems on my project 380, I finally ordered a rebuilt ProgRama control unit - $178.59 and free ground shipping - from ********AZ. It arrived on Friday, and I installed it yesterday. I am very happy to report that I now can regulate the heat and cooling.

This was a long battle. The car needed the following:

- dash sensor
- foam hose from dash sensor to blower chamber
- temperature regulator
- control unit

The ProgRama rebuild came with some interesting troubleshooting tips, which I'll put in a separate post.
Great news!!
FYI, my car is now resting comfortably in a 10x20 storage unit for the winter. I hope that when it emerges from hibernation in the spring, all of my various HVAC repairs are still locked in
Looking forward to seeing the Programa tips.
Take care.
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Old 06-29-2009, 08:48 PM
Super Moderator
Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,316
ProgRama Instructions

1. Turn off ignition and disconnect left and right connectors from climate control unit.
2. Put at meter between left pin 12 and left pin 10. Turn key to run position. Current is less than 1.3 amps. If not, replace auxiliary coolant pump.
3 Put meter between left pin 12 and right pin 4. 11 - 19 ohms. If not, replace monovalve.
4. Put meter between right pin 6 and right pin 3. Greater than 35 ohms. If not replace AC Compressor relay
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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