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Old 08-24-2011, 06:54 PM
mikeyfev1 mikeyfev1 is offline
Chief Village Id10t
 
Join Date: Aug 2010
Location: Houston, TX
Posts: 358
ACC II; is there a way to test it?

Hello,

I have a 1985 300D KaliKar with the ACC II climate control unit. Suddenly the temperature control aspect of the unit seems to not be working. I get heat all of the time.

When I first got the car I never got heat; I found a torn monovalue diaphragm and replaced the core; all was working for a while; heat, A/C, vent, all OK.

Now no matter what I select I only get heat. The fan speed seems to work and the direction of air (which vents are utilized) seems to work. But only heat. I'm in Houston; 34 days of 100+ so far . I don't need no heat.

I have removed the ACC II unit, torn it apart, looked for any broken solder, re-soldered the connections just to be sure and still the same result.

Is there a test procedure for these units, or am I looking in the wrong place?
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Mike Frederick
1986 300SDL, 240K+ miles
1985 300D KaliKar, 270K+ miles
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