Hi,
I have a Craftsman 139.53995SRT / Liftmaster 41A5483-2 that I bought used. I was told it was good but I've installed it and it isn't. It will do nothing! The learn LED flashes 5 times, stops, flashes 5 times, stops in an endless cycle. When I push the learn button it stays solid for a moment then resumes flashing 5 times. Also, the LED(s) on the door sensor(s) are not lighting up. The LED on the door button is lighting up. I measured the voltage to the door button and got 15.4. When I measured the voltage to the door sensors I got 5.4.
Anyone have any suggestions?
Thanks in advance.
Robbie
I have a Craftsman 139.53995SRT / Liftmaster 41A5483-2 that I bought used. I was told it was good but I've installed it and it isn't. It will do nothing! The learn LED flashes 5 times, stops, flashes 5 times, stops in an endless cycle. When I push the learn button it stays solid for a moment then resumes flashing 5 times. Also, the LED(s) on the door sensor(s) are not lighting up. The LED on the door button is lighting up. I measured the voltage to the door button and got 15.4. When I measured the voltage to the door sensors I got 5.4.
Anyone have any suggestions?
Thanks in advance.
Robbie
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