How to fix a malfunctioning garage door sensor

How to fix a malfunctioning garage door sensor

How to fix a malfunctioning garage door sensor

If your garage door is not closing properly, there’s a possibility that your sensor is not working properly. A sensor is a common safety feature in many doors to prevent sudden injury and damage to the garage door.

If you doubt your garage door sensor, then you must check for these 5 things:

  • Sensor moisture
  • Sensor wear and tear
  • Sensor alignment
  • Sensor power
  • Sensor path
  • Sensor lenses

In most cases, you can troubleshoot and fix the garage door sensor yourself. Here’s a comprehensive guide on how to fix a malfunctioning garage door sensor:

Cleaning and adjusting the garage door sensor

Remove any debris, dust, and cobwebs from the sensor’s electric eye lenses with a clean and dry rag. After that, keep opening and closing the garage door using the remote control. If the garage door fails to close completely, there’s no problem with the electric lenses. Move forward with fixing the sensor.

If removing the debris from lenses did not work, loosen the small nuts on L-brackets that hold each sensor together. Do it using a small wrench and try to loosen the nuts to an extent where the sensors still face each other but can be moved easily by hand.

Adjust the sensor to the point where sensor light (green or red) is illuminated. This ensures that the lenses are aligned and connected with the circuit. Tighten the nuts after that.

Open and close the garage door again. If the garage door does not close properly, proceed to the next step, that is, to troubleshoot the electric circuit of the sensor.

Testing the low-voltage circuits

Raise the garage door while ensuring that the green and red indicators of the sensor is switched on. If both are not switched on, move to test the low-voltage circuit of the sensor.

First of all, unplug the power cord from the outlet and start by removing the cover of the unit. Identify all the connection terminals within the circuit board. This is the place where low-voltage wires are attached. If there’s a loose wire, reattach it to the terminal.

Tighten the terminal screw and connect the plug to the outlet. Check if both, green and red indicators are illuminated. If they are not illuminated, move on to the next step.

After that, inspect the double-stranded low-voltage wires of the sensor connecting to the garage door opener. They are usually at the ceiling; therefore, it is recommended to use a stepladder. If you see no visible damage, the sensor has worn out and must be replaced.

If you see burned out or faulty wires, loosen the terminal screws traced back at the overhead unit. Pull the wires out by disconnecting the wires.

Determine the length of the burned-out wire and cut the appropriate piece of new double-stranded low-voltage wire of the same length. Attach to the appropriate terminals on the sensor. Connect the plug to the outlet and check the garage door yet again.

The bottom line

If the garage door sensor still does not work, there’s a possibility you might have to replace it with a new one. Call a professional garage door repair service provider and let him handle the job. you can find us Here


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