If the circuit breaker or gfci is tripping repeatedly it s a sign that there is a short circuit somewhere in the system possibly even the garage door opener itself.
Garage door opener cord too short.
Garage door openers manufactured after 1993 include sensors to prevent a door from closing on a child or pet.
Several safe options just don t splice.
Feed the other end of the cord through the emergency release lever on the door opener.
They don t want people to power them by running cheap cords across the garage or to be responsible of one does.
Pull the end through until the handle is six feet above the floor.
If you garage door is lowering then reversing back to the open position there could.
Not using an extension cord is more of a strong recommendation.
Mc cable installed to fix garage door power plug so extension cord is not used.
The manufacturer s power cord is too short.
This is a problem that will require you or a service person to replace it.
Finally it s possible the garage door opener s motor has burned out and isn t operating at all.
Sometimes it will go along the ceiling and wall to a wall receptacle.
As a home inspector we frequently see extension cords between the garage door opener and the ceiling receptacle.
Best option is to remove the cable and wire the unit with a longer cable just long enough so it can be fixed out of the way and reach the outlet.
Tie an overhand knot to secure it.