Heat setting is missing

[RMKogut]

The heat setting is missing in the mode display.  The choice is Cool or off!  That's it. 

In the wiring setup all of the wires are locked down except the white.  Could that be an issue?

[Patrick_Caezza]

@RMKogut 

Yes, the white wire is normally used for heat if you have a conventional furnace. If you have a heat pump it might not be used.

Can you post a picture of the original thermostat's wiring here?