On a dual fuel heat pump, why does the heat pump outdoor unit ...

[danielfitts88]

On a dual fuel heat pump, why does the heat pump outdoor unit normally shut off when the furnace comes on?
 
  A) the hot air leaving the furnace would cause very high head pressures on the heat pump
  B) the air can only go across one appliance at a time
  C) the combined amp draw of the furnace and heat pump is too high
  D) with both operating, the hot supply air causes customer complaints

Question 2

On an air to water heat pump, where does the heat come from to defrost the outdoor coil?
 
  A) from the outdoor heat strips B) from the buffer tank
  C) from the outdoor air D) from the indoor air

[jonathanballen97]

Answer to Question 1

A

Answer to Question 2

B

[danielfitts88]

TYSM

[flexer1n1]

Thanks for the timely response, appreciate it