kbuhagiar Posted October 21, 2010 Report Posted October 21, 2010 Hello folks, Was a defroster an option on the 1947 Plymouth? Reason I am asking is that I was under the dash last night, doing some wiring, and I realized that there did not appear to be any cutouts on the dashboard which could be used to direct air up to the windshield. OR, to put it another way, if I want to add a defroster unit, would I have to cut holes in the dash? (shudder!) Thanks in advance! Quote
greg g Posted October 21, 2010 Report Posted October 21, 2010 The bottom of the interior windshield trim should have a outlet correspoding to a slot int he dashboard. Whether the other stuff is there, pressed sheetmetal difusers and duct attachment, might be a mystery. Quote
kbuhagiar Posted October 21, 2010 Author Report Posted October 21, 2010 The bottom of the interior windshield trim should have a outlet correspoding to a slot int he dashboard. Whether the other stuff is there, pressed sheetmetal difusers and duct attachment, might be a mystery. Thank you sir! Quote
kbuhagiar Posted April 13, 2016 Author Report Posted April 13, 2016 (edited) Resurrecting my 5-year-old thread for a follow up question... My 47 has a Hupp Model 356 heater installed under the passenger dash; should it have some provision for adding defroster ducting? Thanks again! Edited April 13, 2016 by kbuhagiar Quote
greg g Posted April 13, 2016 Report Posted April 13, 2016 not familiar with that model a picture would be nice, especially of the outlets. Quote
rb1949 Posted April 13, 2016 Report Posted April 13, 2016 Re-analyze the setup. Did your windshield trim have what looks like a defroster blowing area? If so, something must connect to it. Maybe you are missing some ducts which should come from the heater. Perhaps the heater/defroster control operated a flap in the duct, diverting the air to desired location. Hopefully someone with that model that has all the pieces will jump in. Quote
dpollo Posted April 13, 2016 Report Posted April 13, 2016 On the MOPAR Comfortmaster series heaters, there is a diverter which forces air up to the defrosters. There is provision for adding the ductwork below the slots in the windshield garnish moldings. These consist of two sheet metal pieces which fasten to the body and change the long narrow slot to a round sleeve onto which a flexible hose is fastened. The hose then goes to the heater/diverter attachment. I have found a number of these in pickup trucks since they used this setup too, From 49 onwards, the passenger car had a plenum for the defrosters built into the body. Quote
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