How to reset a Chamberlain, Craftsman, or
Liftmaster garage door opener when the door
button or wall panel push button is flashing.

The Chamberlain, Liftmaster & Craftsman
garage door opener wall buttons will flash
when the opener is placed in lock-out mode.

  The garage door opener flashing wall button is completely different from photo-cell LED light being out or the motor head LED light flashing.

  The constantly flashing wall button simply means that the door was either put into lock-out mode by someone using the wall panel control or for some reason it defaulted into lock-out mode in error. When the garage door opener is “locked-out” the transmitters will be disabled from opening the door but the wall button will still function as usual.

   Some older openers used to have a vacation switch for this purpose & this is just the newer version of that same operation. The theory is that if you are going away on vacation or have a security issue the garage door can not be opened by an outside radio signal. Although if you go away on vacation you will want to make sure you have a key to another door into the house or otherwise you will be locked out of your own house when you get back home.

   If you have a 3-button wall panel (push-button, light, & lock) you simply push & hold the lock (padlock symbol) button for approx 10 seconds until the LED quits flashing. Therefore if someone pushes & holds the lock button by mistake while trying to open the door this function will be turned on. To place the unit in lock-out you simply hold the same lock button again for approx 10 seconds until the LED starts flashing again.

Liftmaster garage door opener 3-button wall panel

   If you have just a doorbell type single push-button the opener may have went into this mode in error during a brief power surge or some other momentary glitch in the main processor circuit board. If this does happen the only way to get the unit out of lock out mode is to reprogram all of the transmitters & to reset the keyless entry if you have one.

   At least this is one of the times you don't usually have to contact your local garage door dealer for the repair unless you can't get the garage door opener out of lock-out mode by following the steps above!!!



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Liftmaster Opener Wall Button Flashing


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