Thankyou to those who responded to my 39 degree subcool issue.
At a whim I stuck my meter on my 3 - 10KW heat strips and they were all
lit up - quite ridiculous because in the winter I disconnected my emergency
heat wire on the Tstat because a 2 degree call for heat would instantly
activate the heat pump and heat strips.
Subcool is down to 17 degrees.