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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Apr 2009 Posts: 159 'Bolter | | 'Bolter Joined: Apr 2009 Posts: 159 | I'm not sure if this is the right forum to post this on, but here goes:
I have the original (1950) heater shutoff valve. It goes through the firewall and has two tubes that connect to the incoming heater hose for the heater core. Inside the cab is a knob under the dash that says "warmer" with coresponding arrows.
What has me stumped is the wire or tube coming out of the unit. It looks like it might be a thermometer tube, but for what purpose? Does it open the valve if the heater gets too hot? And what does the loose end connect to? Does it just sit there and monitor ambient air temperature?
Thanks in advance for your help!
Craig
It is neither wealth nor splendor, but tranquility in occupation which brings happiness. - Thomas Jefferson
CK
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