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heater control valve -where does copper tube go?


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It's coiled up and left behind the glove compartment box on the inside of the car.  This controls the flow of hot water through the water valve to control the temp inside the car.  Graham Man is describing the temperature gage tube, but I think you are describing the heater water valve.  You may want to support the coil with a loop of wire or zip tie.

Heater valve 1950 Chrysler.jpg

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The small copper tube should not be just hanging in the open, it should be in the stream of air as it flows through the heater core/system. 

This little novelty works in conjunction with the cable/lever on the dash to control the amount of water that flows through the core. (remember we are talking about a heater VALVE) You set the cable/lever at low or one half and the tube is heated/cooled and allows or restricts the flow of hot water through the heater core leading to a comfortable interior climate.  🙂 

When the lever is on high it doesn't restrict the water flow. 

 

Typically the capillary tube is inside the heater box, coiled up right next to the core. Installed correctly you should not even see it. 

On my 1959 Lincoln there is one valve in the center of the firewall and two heater cores. (one in each kick panel) The valve has TWO capillary tubes. Each is threaded across firewall behind the dash to each kick panel with the last 12 inches(?) wound around next to the core. (Yes a real pain the change!) 

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1 hour ago, m-mman said:

 

Typically the capillary tube is inside the heater box, coiled up right next to the core. Installed correctly you should not even see it. 

Lots of additional information on the internet under "ranco valve"

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Greg, it does not go in the heater box.  That is under the hood.  The coil stays inside the car.  It goes in the airflow of the heater outlet inside the car behind the glove box.  The other guys are giving you general information not Chrysler specific information.  If your heater core was inside the car, there info would be correct but your heater core is in the engine compartment.   I have a '50 Chrysler and it is the same system as yours.

Edited by 61polara (see edit history)
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