The old unit in this garage was having issues with a spazzed out circuit board. Open & close settings would not stay set; thus, the opener was exceeding its limits and slamming the door shut uncontrollably, and then lifting it past its limits. As a result, the trolley was damaged, and the door was soon to follow. The opener was over 8 years old, which is about the life of a garage door opener.
The new unit is identical to the old, a Craftsman 1/2 HP chain-drive opener with two remotes and wireless coded keypad. After the installation, a few minor door adjustments, and some WD-40, this homeowner can once again use his garage! Call me for prices! 419-212-3200