[FWDLK] a/c and the thermal switch update
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[FWDLK] a/c and the thermal switch update



Hello,
To any/ all who have been following my search for information on the a/c thermal switch location in a '59 Plymouth:
Several of you have advised me to insert the probe directly into the evap "coils". The problem is the probe on this NOS switch is only about 6" long, so this action would seem impossible.
However, being a heater-equipped car, there is ALREADY a probe running from the evap. plenum thru a neat little access hole and down to the watervalve on the firewall. All heater-equipped cars have this probe (at least in '59). This probe senses the temperature in the plenum and transmits that information to  the watervalve. It seems logical to me that I can clamp my thermal switch probe to that existing probe anywhere along its length, thereby "tapping into" that signal.
     I got this idea from a photo on p. 470 of the 1958 Plymouth Service Manual. At the watervalve there is a sort of "pliers" clamp which brackets the existing capillary tube, and I think I can just fit the thermal switch sensor right next to it and make good contact.
Philippe, do your pictures support my plan in any way?
as always, if someone can get to an a/c car and visually confirm this is what the factory did, I would be most appreciative...
RogerHowardSeattle



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