How To Test Garage Door Opener Capacitor

Reassure that the opener is unplug from the electric outlet and then remove the plastic cover from the opener.

How to test garage door opener capacitor. Short between the terminals of the capacitor to be sure it doesn t have an electrical charge stored in it. Simply hold down the lock button for a couple of seconds until the green light stops blinking then try your remote or keypad again. It s an all or nothing test that tells you if the capacitor is dead but it won t diagnose one that is still functioning weakly but about to stop working. Do this by hooking the voltmeter s wires up to the capacitor itself.

Disconnect the power to the garage door opener and remove the wires from the capacitor. You can test the capacitor with an ohm meter. Look inside the garage door opener and locate the long cylinder capacitor with 4 wires coming out it will be in either gray black yellow or blue. 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.

There should be wires that connect to the same colors much like jump starting a car. The capacitor in a garage door opener is known as a start or electrolytic capacitor. If the green button is blinking the garage door is locked. Step 3 extract the old garage door starter capacitor.

When you energize the motor by pressing the switch or using the remote power flows to the. You can use an ohm meter to test a capacitor.