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Try this
Posted by Billhart  on January 28th, 2008 11:39 PM
In reply to Garage Door Opener will not close the door by Unregistered-stargazer58 on January 28th, 2008 09:28 PM [Go to top of thread]
http://www.chamberlain-diy.com/diy04/product_support/technical_support/0,1341,uid-eGWJbmJkam9qZQ==_2496,00.html
The URl got double posted.
Anyway this is the important section for 3 flashes.
3 FLASHES - Door control or wire shorted
Symptom: LED is not on door control. - Inspect door control/wires for a short (staple in wire), replace as needed. - Disconnect wires at door control, touch wires together. If motor unit activates, replace door control. - If motor unit does not activate, disconnect door control wires from motor unit. Momentarily short across red and white terminals with jumper wire. If motor unit activates, replace door control wires. Was this post helpful? Yes: or No:
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