Re: Air Conditioned '55-'56 Packards

Posted by HH56 On 2010/1/17 9:40:15

If you would like to know details of 55-6 factory AC, check out the install guide for dealers who had to field install one.https://www.packardinfo.com/xoops/html/downloads/55-56ACInstall.pdf

55-6, everything is under the dash in factory units but dealers could also install aftermarket if they chose so probably a lot did because the factory job is a real project. Those were typically trunk units because of size. 57 Studebaker & Packard still used a trunk unit and then transitioned to the hang on under dash in 58-9 which they used till the end.

As to their operation, quite simple. The only control is a single knob which does off/on and blower speed. Once turned on the clutch engages compressor, constant temp is maintained at evaporator (cold) and degree of cooling passenger feels is how fast the fan blows. On mine, the cooling was excellent to the point of freezing you out in the front seat but a little iffy for those in the back. Usually I froze and they sweated until the car had gone a distance then it averaged out--much like today except you couldn't direct the airflow as well then.

Problem now is most compressor parts and the special modulator valve are all but non existent so anyone with a factory unit, once something happens it's a new ballgame. Find another Lehigh still working or adapt a Sanden or add a thermostat for a cycling clutch.