Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
The original problem was my garage door opener motor would operate but the garage door wouldn't go up or down. I removed the metal housing cover and found that the gear and sprocket assembly was worn flat. I replaced the gear and sprocket assembly. I have a craftsman 1/2 hp chain driven garage door opener - model #139.53674SRT. After replacement and installing the housing in its original position I pressed the wall mounted switch to check to make sure the motor was functioning properly. Now, the motor doesn't work at all and the yellow SRT light flashes 2 times. What does it mean when the SRT light flashes 2 times?
2 flashes is a safety eye issue, but you problen is most likely that the chain is not sync with the limit setting. Take the bottom off the gear and sprocket assemble and rotate center limit srew until it is in the same position as the trolley.
Posted on Jan 30, 2009
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Posted on Jan 02, 2017
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