Chamberlain 3800 - Manual (Page 28)

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1. Press the “learn button” on light until
LED comes ON.
2. Activate the garage door using the
hand-held remote, wall control or
keyless entry.
3. It has learned the code and the light
turns on.
Reprogramming Light or Additional Light
Your garage door opener remote work light has already been programmed at the factory to operate with your opener.
Any additional or replacement remote work lights will need to be programmed.