I have a Craftsman 13953970SRT Garage Door Opener. Why is the yellow light next to the learn button flashing?

Jimmy K EXPERT November 13, 2008

A continual flashing of the learn light on the garage door opener is caused by a RF signal in the area. This is usually accompanied by a loss of range on the remotes.

To locate the source of the RF signal you can turn off all the circuit breakers in the house except the one for the garage door opener. Do this one at a time and watch the flashing light to see if it stops flashing. This would tell you which circuit the signal is coming from. You can then start unplugging things on that circuit to determine what is causing the signal. If this test doesn't locate the source try the following tests.

Try disconnecting the portable phone, the aquarium, the water softener, any electronic item with a remote control. Take the batteries out of the keyless entry and all except one remote then take the batteries out of that remote. If you had a garage door opener before with remotes, look in all drawers and in the cushions of couches and chairs for an old remote and remove the batteries from that remote.

If none of this helps connect a 2 foot piece of small gauge wire to the small antenna wire hanging out of the rear of the motor unit. If that helps you can buy an antenna extender kit and install it.

The remotes and the logic board in the garage door opener are not adjustable. On some of our older openers you could fine tune the remotes. That feature is no longer available. They tell us the new technology doesn’t require it.