I am installing a new ceiling fan that has a remote controlled radio unit, into a junction box that has 3 wires - Black , White and RED. I am assuming the RED wire if for the dimmer switch that was already there for the old unit. The switch on the wall has a regular on/off with a very small dimmer built into the light control (up-down) movement.

Can I just tape off the RED dimmer and not use it at all? Or do I need to connect to a hot wire? The old ceiling fan had 3 wires, a blue one was connected to the red coming out of the ceiling.

What is my best option?

Just cap off the red.