How To Test Garage Door Opener Capacitor

If the green button is blinking the garage door is locked.

How to test garage door opener capacitor.

The capacitor in a garage door opener is known as a start or electrolytic capacitor. You can test the capacitor with an ohm meter. There are a lot of parts that can fail. You can use an ohm meter to test a capacitor.

If you don t notice anything that may look like damage to the capacitor itself then you can hook up your voltmeter. Disconnect the power to the garage door opener and remove the wires from the capacitor. Symptoms include the hum of a garage door opener and its failure to start working or the failure of an air conditioner to cool the room. In my experience the capacitor is the first to go out then maybe the power board or control board.

This light may be located beneath the plastic button requiring you to pop the button off with a screwdriver. Do this by hooking the voltmeter s wires up to the capacitor itself. Simply hold down the lock button for a couple of seconds until the green light stops blinking then try your remote or keypad again. Write notes or draw a picture of where the wires go for reassembly.

When you energize the motor by pressing the switch or using the remote power flows to the.