Average Reviews:
(More customer reviews)This unit was easy to install and fixed my old craftsman garage door opener model 139.53962SRT.
I learned a few tricks in the process
These are some general troubleshooting steps:
1.- Check the wiring first. Be sure wires has not been damaged. With ohm meter check for open circuit or short circuit.
2.-Disconnect the receiver and sender units. They both connect to the same terminals. Terminals 2 and 3 in my opener. Be sure to label the wires to be able to reconnect them later. Measure the voltage in the terminals. It should be around 6 volts DC. Terminal 2 negative. Terminal 3 positive. If there is no voltage the control card in the opener is defective. This kit will not help in that case.
3.- Reconnect the sender unit first. Its LED light should come on. If it does not, the sender is defective. Replace the sender.
4.- If the sender LED comes on, connect the receiver unit. The LED light comes on when it detects infrared light. Point the sender to the receiver. The receiver LED light should come on. If it does not try with a TV remote. TV remotes emit infrared light also. Point any TV remote to the receiver unit and press any button. The LED light in the receiver should light up. If it does not. The receiver is defective.
This kit includes a receiver unit, a sender unit and hardware to install.
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