Climate Control Temperature indication flashes in my '95 Riv

My Climate Control Temperature indication flashes in my '95 Riv after getting it back from the dealer. They changed my heater core, fixed the loose steering column, and a few other jobs not in the dash area. My climate control appears to be working though as I can get cold air or heat, but the temperature will flash sometimes. Sometimes it is steady, but it flashes a lot.
I read in another post that removing the battery temporarily may fix it, but that was for fixing a problem with not being able to get heat. My heat works.
Thoughts?

When you disconnect different things like the sensors on the dash, outside temp sensor, or other parts of the Climate control, it will cause the temperature indication to flash... If they took the dash and everything apart... then I would guess they didn't connect a sensor, If you feel able to remove your dash you could check to see if everyone is plugged in. Do the auto head lights work? If they go on by them self in bright light, the sensors by the front of the windowsheild aren't connected. When I replaced my radio I didn't connect them and found that out.