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How to Troubleshoot a Garage Door

An automatic garage door opener offers a safe and convenient way to access your garage. When a garage door malfunctions, it can completely disrupt your daily routine. Since there are many factors that cause a garage door to operate improperly, diagnosing whether an opener needs to be repaired or replaced can be tricky. If your garage door opener is no longer working properly, try these basic troubleshooting tips to see if the problem can be easily solved.

Check the sensors

Check the sensors on either side of your garage door. The sensors have to be able to detect flashing lights from one another for the garage door to open and close properly. If there are any obstructions preventing the sensors from communicating, move them out of the way. When one of the sensors is knocked out of place, it can also cause the garage door to work improperly. Make sure each sensor is properly aligned.




checking garage door sensors

Check the limit switch and close force

If your sensors are functioning normally but the garage door isn’t opening or closing properly, you may need to adjust the close limit switch or close force control. You can access these controls on the overhead unit. Slowly turn the corresponding knob and test the door until it opens and closes correctly.

troubleshooting a garage door

Test your garage door remote

If your remote can't open or close the garage door, it might be time to replace the batteries. Check and see if the door moves after replacing the batteries with a fresh set. You could need a new remote or wall switch if switching out the batteries doesn't work.




troubleshooting a garage door

Check the power supply

Openers are typically hardwired or plugged into an outlet. Hardwired openers will lose power if a circuit is tripped or if the wiring fails. For plugged-in openers, test the outlet by unplugging the opener and plugging in a small appliance or charger. If the outlet works, you may need to replace the circuit board in your opener. If the outlet has no power, check the breaker box that powers your garage for a tripped circuit.




troubleshooting a garage door

Conduct annual maintenance

Garage doors have many moving parts that can wear out over time. Remember to frequently tune up your garage door opening system every year by oiling the door's chain or belt and tightening its screws. Sometimes, a loose bolt or unlubricated chain might lead to erratic behavior from your garage door.




troubleshooting a garage door