Both the handheld remote and the one in the car have trouble in daylight hours but the light on the unit comes on and the door doesn't open. In the dark they both work. I'm going to try resetting with different numbers today, and yes I changed the battery. Wondering about signal interference in daylight. This is vexing. Any engineers out there?Could be related to the sending unit on the opener starting to go , having a a weak signal. Possibly there is less interference after dark or it’s coincidental.
Check the batteries in the opener itself that might do the trick but you never know.
Great answers everyone. I know Fishy personally and I'll say this.
Call Sears. Have them come put a new one in. Don't pay for the service plan.
For the next 15 years, you'll push the button and the door will open. Period.
I don't know the best ones, but avoid garage genie at all cost. They are terrible and require nearly monthly reprogramming.