Question

question 38
which of the following components would be found on a heat pump but not a central air - conditioning system?
house air fan
outdoor air fan
an emergency heat switch
a crankcase heater
an insulated suction line

Explanation:

Heat pumps can both heat and cool. The Emergency Heat switch is used to activate auxiliary or emergency heating elements in a heat - pump system when the heat - pump's normal heating operation is not sufficient or malfunctioning. Central air - conditioning systems are designed only for cooling and do not have such a switch for heating emergencies. House air fans, outdoor air fans, crankcase heaters, and insulated suction lines can be found in both systems in some cases, but the Emergency Heat switch is unique to heat - pump systems for their dual - function heating and cooling nature.

Answer:

an Emergency Heat switch