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heater rebuild 56 Desoto
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   Forward Look Technical Discussions -> Heating, Cooling and Air ConditioningMessage format
Posted 2020-12-30 8:51 PM (#607272)
Subject: heater rebuild 56 Desoto

New User

Posts: 2

Hello - i am close to buying a 56 DeSoto but the heater is non functional, and the temp gauge does not work. Does that indicate cooling system problems? Assuming I buy the car and want to rebuild the heater, what is involved, in complexity and cost? I am an amateur and would probably have to send this out to be professionally rebuilt. Any ideas on cost? Any recommendations? I live in NJ.
Thanks for any help you can give.
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Posted 2020-12-30 11:18 PM (#607274 - in reply to #607272)
Subject: RE: heater rebuild 56 Desoto

Expert 5K+

Posts: 7121
Location: Lower Mainland BC
Congrats on finding this forum and making your first post.

The heater could be at least two issues: the core and the heater valve:

1. Core:

56D500boy - 2017-06-17 12:06 PM
The OE PN is (I think) 1605 274. Shows up in Section 1-48-88 of the 55-58 Mopar Parts Catalog that is referenced from Item 37 in the diagram below. Shouldn't be too tough to have one made.

2. Heater Valve:

The temp gauge is not likely related to the heater. There are two issues: the sender and the gauge:

1. The sender:

2. The gauge:

They can go bad. The 56 Desoto, white-faced temp gauge should be PN 1648 801.

Hiltop Mopar parts lists a new 56 Desoto 1648 801 temp gauge as being available:

Hope that helps.

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