My thermostat uses the expansion/contraction of a drop mercury to conduct electricity and trigger when to turn off and on.slade797 t1_iybbfs7 wrote
Reply to comment by _thankyoucomeagain_ in My thermostat uses the expansion/contraction of a drop mercury to conduct electricity and trigger when to turn off and on. by Iain_MS
Most are digital nowadays, no mercury.
_thankyoucomeagain_ t1_iybcyuz wrote
Seen very few digital but the do exist. I just repair them. What do I know.
Viewing a single comment thread. View all comments