I realize this question has come up before,but I am seeing conflicting answers.
My Heat Pump is a Carrier 3 1/2 ton air to air split. It has been operating 10 years.
I get cold air for about ten minutes during defrost because the indoor fan is running.
I was told by a VIP poster on the Refrigeration Engineer.com forum that the indoor fan should not be running during defrost and that he has never run his.
A poster on this forum says a definite yes, it shuould be running.
Because of these conflicting answers I was nervous to try a defrost with the fan stopped,so I did a defrost with a normal fan speed and a cfm of 960 and with a reduced fan speed and a CFM of 530.
The results are attached.
So--- Should indoor fan shut down when Heat Pump on defrost????