It was an add-on remote so it really depends on the receiver. Locate the receiver, probably in the canopy cover at the ceiling, and see if it has 4-5 dip switches. If so, just change the settings by changing one of them, by pushing it up or down. Now, open the battery compartment of your transmitter and match the setting you just did to the receiver. BOTH have to be set on the same frequency.
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It was an add-on remote so it really depends on the receiver. Locate the receiver, probably in the canopy cover at the ceiling, and see if it has 4-5 dip switches. If so, just change the settings by changing one of them, by pushing it up or down. Now, open the battery compartment of your transmitter and match the setting you just did to the receiver. BOTH have to be set on the same frequency.