Very Basic Question Re Defrost
I have a one-year-old Carrier HP and Carrier Oil Furnace.
All seems to work well.
I do not understand about the Defrost Cycle.
When does the unit defrost? What does it sense to tell it to defrost? When it defrosts, does the oil furnace operate while the HP is in defrost mode? Does the HP actually operate in A/C mode while defrosting?
If I am not mistaken, my outside unit was once running at the same time the oil furnace was operating - I may be mistaken on this point. would it have been defrosting at that time?