Replacing a circuit board sounds like a scary garage door repair, but it’s really quite easy. It will take 10 minutes tops and only requires a 1/4-in. nut driver. Just follow these steps: Remove the light cover, take out the lightbulb, disconnect the switch and safety sensor wires, remove a few screws, unplug the board and you’re done. A circuit board will cost about $80, so make sure you protect your new one with a surge protector. You can buy an individual outlet surge protector at a home center for less than $10.
Annual maintenance. Make an annual check of all nuts and bolts on rails and rollers to make sure they’re firmly tightened. Check the condition of all cables to make sure they’re not worn or frayed. Lubricate rollers and springs with a garage-door lubricant (see How to Fix a Noisy Garage Door for maintenance and problem-solving tips). The door should operate smoothly and be properly balanced. Check the balance by disconnecting the opener and lowering the door halfway- the door should hold its position. If it doesn’t, adjust the spring tension or replace the springs.
You'll never ask yourself that question again. Just look at your phone to know for sure. Most smart garage door openers will tell you if it's open or shut. They'll send a message every time your garage door is opened or closed too, if you like. Electric garage door openers provide a huge amount of convenience and safety. Imagine you're in a hurry, it's raining out, you pull out of the garage then press the button on your garage door opener remote. The garage door closes, and you didn't have to get out of your car. 
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