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#200570
JACQUES
Participant

    the old style round furnace wall thermostats had mercury switches inside….

    https://www.bing.com/videos/search?q=old+style+round+furnace+thermostat&docid=608034538328821219&mid=BD8F70BB1D444BFCB5B3BD8F70BB1D444BFCB5B3&view=detail&FORM=VIRE

    Joining AOMCI has priviledges 🙂

    • This reply was modified 6 years, 6 months ago by JACQUES.