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Garages/Workshops

My GDO doesn't work right

19 years ago

Help! I recently replaced the main drive gear and worm gear on my Sears 1/2 hp garage door opener, model 139.53535SRT1. Now, after I reconnected everything the only travels about 8 to 12 inches each way. I also noted that the LED bulb next to the code button flashes five times, then pauses. It continues this cycle. Can anyone tel me what the five flashes stand for?

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Comments (3)

don_1_2006
19 years ago
The 5 flashes means 'RPM sensor or motor overload'. Did you remove the black plastic interrupter cup when replacing the gear? Also check to make sure the 4 wire connector to the RPM sensor board is plugged in solidly.
forrest_68405
Original Author
19 years ago
Is that the cup that goes on the motor shaft after everything is put back together? If it is I believe my chocolate lab might have had it for a snack!
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don_1_2006
19 years ago
Yes that is it. Maybe tomorrow you can recover it and get your opener operating again. Wash thoroughly.

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