If you replace with a blank plate wire nut the black from supply to this black and again cap the red.
Can you wire a ceiling fan to a dimmer switch.
By all means you can connect a ceiling fan directly to a dimmer switch but you may run into problems along the way.
To do this method the wire from your wall circuit to your light has to have 3 wires.
These typically require you to leave the white neutral wires in the switch box undisturbed and connect.
If you locate this switch then both ceiling fans can be wired from one switch.
If you replace with a plain switch switch the black wire up to the fan and cap off the red wire on both ends.
A broken ceiling fan motor and a house fire are obviously not ideal outcomes however there is some good news.
Your power supply line the black wire should be feeding both switches and those switches power the fan black or the light blue.
If it s more than just a dimmer you might keep it in a box for if you can use it later.
Connect black fan wire to the black ceiling wire.
Connect the blue wire to the red wire.
The new switch does require an additional electrical wire.
Follow the manufacturer s instructions to hook up your dimmer fan switch at the switch box.
An example of this is that the motor in your fan could be damaged and rendered useless.