The motor runs, the chain rattles along the rail, and the door does not move a millimetre. You notice the little carriage sliding back and forth on its own.
The door closes, touches the floor, then climbs straight back up as if it hit something. Nothing is in the way, the sensor lights are steady, and it has been doing this since the weather turned.
After the power came back you pulled the red cord to get the car out. Since reconnecting, the door stops short of the floor, and no amount of turning the limit adjustment brings it the rest of the way down.
The remotes only work from the end of the driveway now, and one of them disappeared with a set of keys last month. Inside the remote are tiny switches instead of a learn button, so excluding the missing one means resetting the switch pattern on every remote and the receiver.
There are no sensors at the floor at all, or a previous owner has wired the pair together up beside the motor so the beam never crosses the doorway. A home inspector has just pointed it out.
The outdoor keypad worked all summer. Now that the mornings are below freezing it lights up faintly, takes the code, and the door does nothing.
The house came with a controller already screwed to the garage ceiling and a sensor on the door, but the app insists the device belongs to another account. The seller has moved provinces, the emails go unanswered, and every evening the door still reports to a stranger's phone.
It is the coldest morning of the year. A week of slush and road salt has crusted over the outside release lock, the key will not seat, and the opener inside is silent after the overnight outage.