What is em heat on honeywell thermostat?

EM heat on a Honeywell thermostat stands for Emergency Heat. This setting is typically used when your primary heating source is not working properly or is unable to adequately heat your home. Emergency Heat will activate the backup heating system, usually an electric resistance heating element, to provide heat until the primary heating source can be repaired.

It is important to note that Emergency Heat should only be used in true emergencies, as it can significantly increase your energy costs. It is not meant to be a long-term solution for heating your home.

To activate Emergency Heat on a Honeywell thermostat, you typically just need to switch the thermostat to the EM Heat setting. However, it is always recommended to refer to the user manual for your specific Honeywell thermostat model for detailed instructions on how to use Emergency Heat.