garage door opener

came home last night & the transmitter wouldn't open the door. went inside and the switch worked and opened the door just fine. but you have to hold the button down to close else it starts back up again. So two related problems. Any ideas? thanks in advance
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batteries

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Batter likely needed for the transmitter and the button needed to be held down because it is thinking something is obstructing the opening, check out the electric eye sensors or the balance of the door (it should open and close easily and stay in both the open or closed position when disconnected from the opener).
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Joseph E. Meehan

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did replace battery - no diff will try your suggestion do they all have electric eyes?

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look at the receiver led carefully, cup your hand over it and do an alignment first before you troubleshoot because marginal alignments will cause the led to light. Another issue is if you have the new track mounted sensors that snap on. They are more sensitive to alignment because of track motion and in some cases you may have to anchor loose door track to eliminate problem. see faq #2 http://mywebpages.comcast.net/froarty572/openfaq.htm Frank
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solved turns out the system has a "lock" switch that was accidently pushed. Unlock & all is well. Kind of like is it plugged in??

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