Garage door troubleshooting guide door opens then closes again this may be a problem with the sensor.

Troubleshooting electric garage door. If the track appears to be clean and well aligned then the problem could be with broken or rusty rollers. Door will not completely close this could be one of several things. Garage door won t open all the way. Of slack from the rail to the chain check your manual.

Most chain drive openers suggest you tighten the chain so there s about 1 4 in. It s also possible that the circuit breaker fuse or gfci outlet powering the door opener circuit has tripped or burned. Garage door reversing before closing garage door openers manufactured after 1993 include sensors to prevent a door from closing on a child or pet. Over tightening the chain will put excess wear and tear on the shaft and gears.

Replace them if needed or. The door sticks while closing or opening check the tracks to confirm they are clean and free of debris that can get in the way of the rollers and make them stop. As with many such problems the most common problem is the simplest one the motor unit has been unplugged. If you garage door is lowering then reversing.

Pull the emergency release chain if the door still won t open proceed to the next step. Finally it s possible the garage door opener s motor. Loud screeching noises when operating the garage door loud grinding jumping action screeching or squealing usually means there is dirt and dust in the tracks of the door try to clean the entire track out with a cloth be sure not to use harsh chemicals on the guides. Check the chain tension.

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