To troubleshoot this, first, check if any of the safety sensor wires have been disconnected behind your Craftsman opener. If the Diagnostic LED on your Craftsman garage door opener blinked two times, then it means the safety sensor is disconnected from the garage door opener. Check the safety sensor’s connection to the garage door opener. If that’s not the case, then adjust it till the LED turn and stay on. When the sensors are properly aligned, the green LED will turn and stay on. The sensor with the yellow LED is the sending sensor, and the receiving sensor has a green LED. One sender known as the sending sensor emits an infrared signal, and the other sensor, which is, the receiving sensor receives that signal They are supposed to face each other every time. As you may already know, there are two sensors, one on each side of the door. The next thing to do is to make sure the safety sensors are aligned. It could be a suitcase or some items you took off your car’s trunk and forgot to take them. ![]() So, verify if there is something in the way of the door. This is exactly the reason why they are installed: to prevent accidents. ![]() If there is something in the doorway, the safety sensor will detect it and prevent the garage door from closing. Here are the steps to troubleshooting a safety sensor issue Check for obstructionĬheck if there is anything in the way of the garage door. Older Models Newer Models (UP – DOWN) Problem 1 blink 1 – 1 Sensors are Misaligned 2 blinks 1 – 2 Sensors are not installed, disconnected or wires are cut 3 blinks 1 – 4 Sensor wires are shorted The table below shows how to identify the issue with the diagnostic code. With the diagnostic feature on Craftsman, you can know what exactly the issue is. There are a few things which can cause this. When the garage door does not close, and the lights flashes, it means the problem is with the safety sensor. Check if the garage’s fuse is in good condition or the circuit breaker has not tripped open. The next thing to check is your home’s circuit breaker or fuse. Unplug the garage door opener from the socket-outlet, and plug in another device. So, get a ladder and place it under the opener. If the garage door opener is not powered up, it won’t work. The first thing you want to check is the socket your Craftsman opener is connected to. Here are the troubleshooting steps Check the power supply. If you tried operating the garage door opener from both the remote control and the door control and the opener did not activate. If your Craftsman garage door opener is not working at all, there won’t be any signal to tell you that.
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