Replacing a garage door opener is a common issue, and programming a remote control is easy. Please look at one of the scenarios below for the best solution to your situation: My remote control was lost or stolen. I purchased an additional remote control and just need to program it to my opener. If your remote control has been lost or stolen, a person will have unabated access to your garage. You should erase all existing remote controls out of your receiver. See section below for LiftMaster. See your owner’s manual for other brands.