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Author Topic: A/C/heater Control unit differences  (Read 796 times)

Steve

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A/C/heater Control unit differences
« Reply #15 on: October 18, 2009, 08:18:42 AM »

Yep That's the one.  Sjaks buddy bought it.  The car had one small spot of rust on it when I got it.  Took all of an 1.5 hours to weld in a new patch, fill, amd paimt.  Even got rust proofed from behind.
 
Another wiring nightmare when I got it.
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firedome

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A/C/heater Control unit differences
« Reply #16 on: October 18, 2009, 03:29:48 PM »

I think they are all wiring nightmares!  But oddly, my '71, when I had it, never gave me a problem.

That was the best car I ever had...  I paid $300 for it in '81
from an old man that had maintaianed it meticulously,  it had
99,000 mi.  I drove it for anotther 100,000 mi, and sold it in '87
for $350 because of serious rust out!  But it still ran like new,
and didn't even burn oil !!!



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Brian Peddigrew

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A/C/heater Control unit differences
« Reply #17 on: October 19, 2009, 01:54:59 PM »

Usually cars with A/C had a cable controlled valve in the heater hoses. In cars without A/C, the cable was used to open and closean air door in the heater box and the heater valve in the heater hoses was vacuum operated.

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Steve

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A/C/heater Control unit differences
« Reply #18 on: October 19, 2009, 05:40:05 PM »

It depends on the year.  The 71 with A/C used a vacuum control. 
 
By the way, the valves are available aftermarket
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firedome

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A/C/heater Control unit differences
« Reply #19 on: October 20, 2009, 04:14:27 AM »

Yep like Steve said this '71 is all vac operated. I should probably go
ahead and just replace the heater valve if it's available aftermarket
(NAPA?).  I'm sure it's on the edge by now.



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