we need to know if we don't connect the red wire and just cap it off.
Get a volt meter and test between the white wire (place probe on white wire) and the red and black wire and see if you have power to either or both if both just chose either black or red and cap the other off, or see if one of the colors is attached to a switch,that should connect to a light kit if you have one, the connection should be between the white and one of the colors the green is the ground and gets attached to the ground wire on the fan.
Generally, a standard R 14-3 wire running from the wall switch to the ceiling fan will have four wires (red - hot, black - hot, white - neutral and copper or green - ground). In most cases, this type of wiring configuration is used to power the fan and light kit independently from one another. If however your new fan only requires a black, white and green - my advice would be to cap off the red wire - unless the new fan has a light kit with a separate power option. If this is the case, the light kit will be powered by the red, white and green wires. Good luck!
Well, is there a red wire in the fan to connect it to? If not, then you should probably ground it. If it's an older house, you should call an electrician to test it and make sure. You wouldn't want to risk hooking up the wrong things.
the four wires are for the fan and the light on the fan do you have two switches for the fan itself one for light one for the fan blades? The red is the same as black its just a control so hoook it where it goes if your new fan has a light or just cap it.
White goes to white wire (neutral) green goes to green or screw on gangbox (it's the ground wire) Black or hot wire to black one and yes, just cap off the red wire
