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View Full Version : What is the EM heat position on the thermo stat do or does

robert rob
May 23, 2015, 07:44 PM
What does the them heat position on th honeywell thermo stat do
smoothy
May 23, 2015, 08:37 PM
Emergency heat. Usually electric to supplement a heat pump system when the temperature drops sufficiently low
bitters
May 24, 2015, 02:09 PM
EM switch locks out the heat pump and uses electric heat in the furnace.