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gray mercury?

964655
964655 Member Posts: 2
in THE MAIN WALL

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  • GusHerb
    GusHerb Member Posts: 91
    gray mercury?

    Does anyone know why mercury in a thermostat would turn gray and seem sluggish to get across the tube?
  • BigRed
    BigRed Member Posts: 104
    Mercury

    I have seen this befor as well I speculate that the mercury was bad all of my finds where on new installs, I installed about 350 in an apartment building and I had about 4 of these sandy mercury thermistats. I dont even know if mercury can be bad. Maybe it was the amps.


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  • GusHerb
    GusHerb Member Posts: 91


    ive used other thermostats of the same model on this system without this problem and the mercury was fine before install
  • 964655
    964655 Member Posts: 2


  • GusHerb
    GusHerb Member Posts: 91
    why newer tstats

    i have two of these thermostats both used and with gray mercury bought from diffrent places but bought in the same year. i also have an old gold one with good mercury. could honeywell be sabbotaging the mercury of these newer round thermostats.
  • Empire_2
    Empire_2 Member Posts: 2,340
    Gray mercury

    I believe it is a contamination sign. When it is open to the air and electrical current is passed thru, I think this is the result. I to have seen it in the past.
  • GusHerb
    GusHerb Member Posts: 91


    if it were open to the air wouldnt it of gotten out?
  • Empire_2
    Empire_2 Member Posts: 2,340
    ;--)

    Im thinking either the seal has failed or glass with small crack.
  • GusHerb
    GusHerb Member Posts: 91


    the gold tstats ive never had a problem with its only the newer ones i bought.
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