Here are the most common problems, along with repairs for garage doors & openers.

Garage door opener does not operate with either the remote or the wall switch: 

The power source has probably been disrupted - check to see if it is plugged in.  Check your circuit breaker, fuses and power boxes. Also, check the batteries in your remote, keypad or wall button.  Perhaps it needs to be reprogrammed. 

Garage door won't close all the way: 

Check the limit switch - needs adjusting.  If not, see if the door is binding when raised or lowered and to see the the photo cells/electrical beams or they are aimed directly at one another, or has something blocking it. 

Garage door reverses before hitting the floor:

Check photo cells/electrical beam - may be blocked at floor level of the door.  Close force may need adjusting.  

Garage door does not open completely:

The limit switch may need to be removed away from the motor unit. Make sure the antenna on the motor unit is hanging down.  

Broken springs or a broken motor:

These are the most serious garage door repairs.  It is always recommended to replace springs in pairs, to ensure balanced operation.  A professional should repair a broken spring or motor.  

 Regular maintenance of your garage door system may help prevent some garage door repairs.