I installed Add-a-Motor Model D20 automatic pop door openers on my chicken and guinea coops this spring. They were GREAT! In addition to the nipple waterer and automatic feeders, they essentially "automated" chicken keeping and meant we could go out of town and only have a chicken sitter every few days, rather than twice daily. Unfortunately, the guinea's motor actuator failed, causing the motor to continue to run, resulting in the hook holding the door to be straightened, which caused the door to fall and stay closed. I returned the motor under warranty and they promptly fixed it and returned it free of charge. So, I really don't have a problem with the company's customer service. Unfortunately today, the same thing happened in my chicken coop. We are getting ready to leave town for vacation next week. I'll put the repaired motor on the chicken coop and leave the guineas to free range, or locked in their coop, while we are gone. So, I have a plan for the immediate problem. My questions are: has anyone else had trouble with this motor's actuators failing? We had a brief power failure last night, do you think that had anything to do with it? Any suggestions, baring replacing the door mechanism with another type of auto-door? Thanks for your ideas.