I run a garage door company, and the job is closer to debugging than people expect. The most common call goes like this: "the door will not close, and the opener light just blinks." The tempting fix is to treat the blinking light, maybe reset the opener and hope. Resetting clears the state. It does not tell you why the state went bad.
Nine times out of ten the real cause is a pair of safety sensors near the floor that have drifted out of alignment. The blinking light is not the bug. It is the log message telling you a lower-level check is failing. Reset the opener and the light comes back, because the misaligned sensor is still there. You have restarted the service without fixing the leak.
The workflow that actually holds up:
1. Reproduce. When does it fail, and what is the exact signal? A blink count is an error code.
2. Read the log. The opener is telling you which subsystem tripped. Learn to read it instead of clearing it.
3. Find the root cause. Sensor alignment, a broken spring, a frayed cable. Fix that, not the symptom.
4. Verify. If it fails again through the thing you "fixed," you did not fix it.
The failure mode I see most is step 1 and step 4 skipped, and a lot of resetting in between. That is a system running on restarts. Same lesson whether it is a garage or a service that mysteriously recovers every time you bounce it.
Rise Up Garage Doors, Mint Hill NC. riseupgaragedoors.com
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