Are 73 and 74 heat/ac controls the same?

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Clelan

Clelan

Inferno Red Duster
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74 Plymouth Duster with AC. Will the Heat AC controls be the same as the 73 manual shows? My 74 isn't blowing any heat.

Cley
Screenshot_20241023_203350_OneDrive.jpg
 
The vacuum circuit diagram on page 24-44 in the 1973 service manual is identical to the 1974 service manual.
Both years have the same vacuum hose harness and the three vacuum actuators under the dash.
 
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