I have a Harbor Breeze Fan for over a year with no problems. The other day
When I put it on via the remote it only would go to one speed and the lite would
Not go on... Well I changed the battery and all seemed well... But after a few
Days the lite will work with the remote but the fan will not go to the slow speed.
Any ideas??
Thanks... Bill Z.

Try changing the battery again, if this has an affect, it is probably the remote that has failed. Does the LED still light when you attempt to change to the slow speed?

Otherwise it is the receiver.

Ceiling fan remote controls - help and FAQ- Ceiling Fans N More (http://www.ceiling-fans-n-more.com/ceiling-fan-remote-controls.php)