How to Replace a Garage Door Opener Capacitor

What You'll Need
Safety Goggles
Safety gloves
Replacement Garage door opener capacitor

If you find that you have damaged the garage door opener capacitor on your garage door, then you need to replace it in order to get the door working properly. Before you perform this task, you will need to ensure that you have actually damaged the capacitor, and not simply broken off the radio receiver, or burnt part of the electrical connections. It is pretty hard to damage the capacitor, although it can break down through old age. 

Step 1 - Close the Door

The first thing that you need to do is ensure that the garage door is completely closed. You can wedge something against the bottom in order to keep it closed, or you could choose to use a clamp against the top of the door, as this will work equally well. In order to remove the capacitor, the door cannot be opened, particularly as you will be balancing on a ladder at the top of it. If you are worried, seal off the area of the door, and cover the wireless receivers.

Step 2 - Extract the Capacitor

Disconnect your car garage door opener capacitor from the electricity supply. This is vital, as you don't want to be touching live wires. Remove all of the wires from around the capacitor. You can then touch the parts which are in front of the capacitor, and remove them slowly, using the wrench to extract them. Take them off, and make a note of the order in which you have removed them, as this is vital to putting them back on later. Once the way is clear for the capacitor, unscrew it from the wall, and pull it down. You should then check to make sure that it is damaged beyond repair.

Step 3 - Add the New Capacitor

Take your new garage door opener capacitor, and screw it into the wall where the old one used to be. You should be able to line it up so that it fits as neatly as possible into the old position. Replace all of the other parts that you have removed from the end of the garage door opener, making sure that they are in the right order. Reconnect the wires which you have removed from the capacitor, and turn the power back on.

Step 4 - Finishing 

Once you have done this, you can then go ahead and open the garage door. Make sure that it is fully closed again, and that you have removed all of the obstacles to your wireless connection. You can then press the garage door opener remote, and check that you can now open and close the garage door as before. If you experience any problems, check that you have wired up the capacitor properly.