How To Test Garage Door Opener Capacitor

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.

How to test garage door opener 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. Reassure that the opener is unplug from the electric outlet and then remove the plastic cover from the opener. 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. Simply hold down the lock button for a couple of seconds until the green light stops blinking then try your remote or keypad again. If the green button is blinking the garage door is locked. Do this by hooking the voltmeter s wires up to the capacitor itself.

Short between the terminals of the capacitor to be sure it doesn t have an electrical charge stored in it. The capacitor in a garage door opener is known as a start or electrolytic capacitor. You can test the capacitor with an ohm meter. You can use an ohm meter to test a capacitor.

This light may be located beneath the plastic button requiring you to pop the button off with a screwdriver. When you energize the motor by pressing the switch or using the remote power flows to the.