Allowing me to sleep properly and investing time on number crunching.
What I expected to be a 15 minute fix became to be an almost 2 hour one. The main reason: the problem was not really related to the safety sensors, but a bad cable which I could not identify the first time.
I had a problem today with my garage door opener. When I pressed the button to close it was not doing so and flashing the light bulbs instead.