some info for ya Dodge:
If your Chamberlain 1/2 HP garage door opener remote isn't closing the door, the most likely culprits are: dead batteries in the remote, misaligned safety sensors, a faulty remote needing reprogramming, or a problem with the motor unit itself; check the sensor alignment, replace the remote batteries, and try reprogramming the remote to the opener if necessary.
Common problems with a Chamberlain 1/2 HP garage door opener include: issues with the remote control (low battery, not programmed), faulty safety sensors misalignment, motor problems (overheating, worn out), power supply issues (circuit breaker tripped), damaged wires, incorrect door limit settings, and a malfunctioning control board; if your door won't open or close fully, check for obstructions in the track or potential issues with the door springs as well.
willy