Thermostat shelf life? 40 years old ok?

Heating, Cooling & AC

  1. mrmolding

    mrmolding FBBO Gold Member FBBO Gold Member

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    Found some really old thermostats and wondering if I should use them or not. I think I got them in 82. They’ve got slight tarnishing — any thoughts or help is welcome!
     
  2. dadsbee

    dadsbee FBBO Gold Member FBBO Gold Member

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    Better than anything made today...
     
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    • mrmolding

      mrmolding FBBO Gold Member FBBO Gold Member

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      Too funny!
       
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      • WileERobby

        WileERobby Well-Known Member

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        More than likely. Just check by immersing in water, then heating with a thermometer in the water. Observe the action as the water temp reaches the indicated temp on the thermostat.
         
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        • 1 Wild R/T

          1 Wild R/T FBBO Gold Member FBBO Gold Member

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          It would be funny... If it weren't true.... Forty years ago our parts came from USA... Not so much these days..
           
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          • mrmolding

            mrmolding FBBO Gold Member FBBO Gold Member

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            Boxes are labeled from Tennessee! I’ll boil it and see how it does. Thanks!
             
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            • 69 Sleeper Bee

              69 Sleeper Bee Well-Known Member

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              My mechanic neighbor just put a new crate motor in a 95 Chevy van and has gone through 4 brand new thermostats because they were all bad right out of the box and causing initial overheating from a cold start.
               
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              • toolmanmike

                toolmanmike Henchman #2 Staff Member FBBO Gold Member

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                I check them all that way. Last time I bought a t-stat I went through 3 before getting one that was right.
                 
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                • bm02tj

                  bm02tj Well-Known Member

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                  Watch it open and close then check seal for seating nice and smooth
                   
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                  • 64BEL

                    64BEL Well-Known Member

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                    That's how we would trouble shoot a cooling problem 40 years ago in the garage I worked at, rather than just putting a new one in.
                     
                  • mrmolding

                    mrmolding FBBO Gold Member FBBO Gold Member

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                    Wanted to thank everyone for their help! I put the NOS Robertshaw 370-180 in boiling water and it opened right up! Installed it this evening.

                    76C6DA5D-F1D3-406C-8C88-3BBADB18631C.jpeg
                     
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