My in-law has a 3 years old Carrier Infinity system. Last fall, they mention to me the stat screen was showing "Emergency Heat" on the screen.. I go and check it and sure enough it was showing that... So I go into the advance setting menu to see what's going on, and all is normal.. When I go back to home screen "Emergency Heat" then goes away.

We were there yesterday, and she said it's doing it again.... I go check all settings, and nothing is set up as a heat pump.. Just an infinity furnace and A/C.

The system works just fine....