How do I reset my hampton bay celing fan the remote does not work and fan spins only slow speed

Push and hold down the button for about 5 seconds. That should reset it the default.

Not true there is no reset for ceiling fan remotes, other than cutting power and then cutting it back on.

Does the LED in the remote light up? If so, it is likely a receiver problem. If not it is the remote and you should check the battery and possibly try a universal replacement.

Ceiling fan remote controls - help and FAQ- Ceiling Fans N More