Assertion: heat pump's system | /r/CapableOf | switch into reverse
Facets:
value: to defrost the coils
type: PURPOSE
value: temporarily
type: MANNER
Source sentences:
text: A heat pump will also turn on and off less often than a gas furnace, and most systems have eliminated the blowing of cold air through the vents that used to occur when the system temporarily switched into reverse to defrost the coils.
text: In a typical air-source heat pump, there's the need for a backup burner to supply temporary heat when the system switches into reverse to defrost the coils.