When the winters are too cold for your heat pump to bear and your heat pump struggles to extract heat from outdoor air, the auxiliary heat acts as the second line of defense. This supplemental heat function is normally activated when outdoor temperatures fall to 35 degrees Fahrenheit or lower.
Once you’ve set your thermostat to emergency heat, your system bypasses your heat pump and instead accesses the auxiliary electric heat coils or the gas or oil furnace to warm your home.
Thermostat Emergency Heat Setting
Your emergency heat setting should only be used in emergencies! If your heat pump is operating correctly, there’s no need to activate the emergency heat.
If your outdoor unit is damaged from a fallen tree branch or if your heat pump freezes over, you’ll want to set the thermostat to emergency heat and contact an HVAC technician to help you with repairs.
Depending on whether you have an electric, oil, or gas heating system, the emergency heat should keep you and your home warm until your heat pump or furnace can be fixed. However, this heat setting is only meant to run temporarily, so you’ll want to call for repairs as soon as possible to avoid drastic energy bills.
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