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BillyHvac, Journeyman HVAC Tech
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Thermostat Setting Read, Cool / Heat / EM Heat. What Does EM

Resolved Question:

Thermostat Setting Read, Cool / Heat / EM Heat. What Does EM Heat Setting Mean. My System Is Totally Electric.
Submitted: 5 years ago.
Category: HVAC
Expert:  BillyHvac replied 5 years ago.




EM = Emergency Heat.


This is commonly on heat pump systems with an electric back up coil in the furnace. If the heat pump doesnt keep up it can be switched to the electric coils.



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