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.

How to test garage door opener capacitor.

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. The capacitor in a garage door opener is known as a start or electrolytic capacitor. Reassure that the opener is unplug from the electric outlet and then remove the plastic cover from the opener.

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. 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. This light may be located beneath the plastic button requiring you to pop the button off with a screwdriver.

You can test the capacitor with an ohm meter. If the green button is blinking the garage door is locked. You can use an ohm meter to test a capacitor. When you energize the motor by pressing the switch or using the remote power flows to the.

Step 3 extract the old garage door starter capacitor. Write notes or draw a picture of where the wires go for reassembly.