How do I reverse direction of hunter fan using 99121 remote control?

Free online manual gives a suggestion that you may already tried to select the fan speed, and then click on the reverse button.

Some ceiling fans also have a cord to pull to reverse direction, but unknown whether or not your fan has it.

https://www.manualslib.com/manual/808927/Hunter-85095.html?page=2

Buy another fan with a reverse switch.

you don't
Reverse direction for a ceiling fan is a clockwise motion producing an updraft. In the winter, when your heater is running, reversing your ceiling fan moves warm air near the ceiling down to the floor. This greatly reduces your energy use and can lower your energy bills by as much as 15 percent. You will need a ladder or a step stool to reach the motor housing. Turn off your ceiling fan and locate the direction switch on the motor housing. This one is here, sometimes they are on the top of the motor housing. Make sure your fan has come to a complete stop before flipping the direction switch in the opposite direction

You cannot do this because the remote has a connection for reversing the direction of the blades. Hunter does not post the schematic for their fans. There is a common, low, medium, high and possibly the light and the reverse direction. IF you do manage to connect it, you will lose a lot of functionality.

The fan remote control receiver used in the Hunter 25730 model fan (see picture) is not available from Hunter. Remove the fan from the ceiling. Remove the receiver and take it to recycling. It can be replaced using a readily available and inexpensive replacement universal remote and receiver controller. There are limitations though. The Hunter receiver provided fan reversing functions. The universal controllers do not. You therefore have two options.

Option 1: The universal receiver can be installed such that the fan direction is fixed, either up or down, all other functions operate normally.

Option 2: A reversing switch can be purchased from Radio Shack for about $4 and installed in the fan. This does require cutting a square hole and drilling two bolt or rivet holes in the side of the cylindrical housing which previously housed the Hunter receiver. I'd suggest the Radio Shack DPDT slide switch part number 275-403.

Refer to the wiring diagrams and connector pinout diagram for connections. Please note that the connector pinout diagram is the connector that is soldered to the circuit board as shown in the photo of the Hunter receiver. If your motor wire colors are different then with the connector unplugged from the receiver use a multimeter to probe all the motor wires in order to identify two pairs of wires that indicate approximately 70 ohms each pair. These will be the motor windings.

need to know how to programme carib 880e remote

Model 22450 does not have a reverse motor. The blades are spring loaded. You change the blade pitch by pushing in and twisting. This will change the air flow direction.

I recently had Hampton Bay fans installed with the Hunter remote and the electrician showed me that there is a small switch on the fan and you turn it either up or down depending on whether it's hotter months or cooler months because it changes the direction of the airflow to cool down a space or help spread heat. That may be what your issue is-- it's probably set to help spread heat rather than cool things down. I hope this helps!

My Hunter Remote does not have a Reverse button and can't find the manual

I was puzzled too... here's my fix... the remote has six buttons, the very small one at the top is the reversing button. Remote is part # 85095. It's a Westside II fan, bought at Costco.