Joined: Aug 2009
Feb 6 at 8:37 PM
Depending on age or make, some have adjustments for sensitivity, meaning during certain times of the year it may take slightly more power to raise or lower the door. So there is an adjustment on the opener. Otherwise the spring may need adjusting which is somewhat dangerous, or the door may not be operating square to the opening. The manual should describe all of this, if you don't have one, you could probably find it on the internet. Or as you requested, hire someone that knows.