We had these guys out to service our garage door before several years ago and they did a great job. So when out door started acting up I called again. Tommy the sails and service manager that answers the phone was able to help me with out a service visit. After taking my information he asked and I told him the door was going up and not down again. he then asked if it started to go down and stopped. yes. He said it's the safety beam. I told him the red light was blinking. He told me I had a Genie and the were some cobwebs or it was slightly miss aligned. I adjusted the alignment slightly and it worked perfectly. Tommy's ready knowledge of garage door openers saved me a service visit. You guys are my garage door guys forever.