What I assume you are trying to do is prevent the aux.(furnace) from
kickinig on when the stat is raising the temp from 55 to 65. Your best
bet would be to install an outdoor thermostat so the furnace will not
kick on at all when the OD temp is above the balance point of the heat
pump, except when the HP goes into defrost. Another alternative would be
to install a little toggle switch in the W2 line from the thermostat and
control it manually.