There are a lot of things around a house that can break and not impact your daily life, but a garage door opener isn’t one of them. Garage door openers make life easier by preventing you from lifting a heavy door or braving bad weather to open it manually. So when a garage door opener stops working, it’s time to roll up your sleeves and get to the bottom of it.
This guide will cover some of the most common garage door opener problems and their relatively easy repairs. By the end, you’ll be comfortable troubleshooting garage door opener issues and fixing them, saving hundreds of dollars on a professional repair.
Take Safety Precautions First
Unless you’re specifically testing the low-voltage circuits that need to be powered, unplug your garage door opener anytime you’re working inside of it. This will help you avoid electric shock while also preventing you from getting your hand or arm caught in the garage door opener if someone accidentally activates it.
Problem: Opener Trolley Won’t Catch
The carriage trolley is the mechanism that attaches the door to the drive chain and rides along the railing. It can be disconnected by pulling on the emergency cord, allowing someone to get out of the garage in a power outage. However, if the carriage trolley won’t re-engage, the garage door won’t work.
Solution: Check the Pull Cord
Ensure that the lever that the pull cord is attached to is pushed back to its utmost position. Then run the garage door opener. It should snap back onto the chain automatically when the garage door opener reaches the top of its open cycle.
Problem: Your Wall Switch Won’t Work
If your garage door opener’s remote works perfectly, but the switch on your garage wall doesn’t, you likely have an issue with the switch or its wiring. Luckily, the solution is fairly simple.
Solution: Tighten or Replace the Wires in the Switch
- Remove the cover from the wall switch. This should expose terminals with at least one set of wires (if you have two garage door openers, you’ll likely have two sets of wires).
- Create a “jumper” by cutting a length of 3-inch wire and stripping its ends back about ½-inch.
- Place the ends of the jumper wire on the terminal screws (again, this is low voltage, so you won’t get shocked).
- If the garage door opens, your switch needs to be replaced. If it doesn’t open, chances are, the wires are either loose in the opener or the switch, or there’s a break or short in the line.
- Use a small flat-blade screwdriver to tighten the wires in the switch and the garage door opener. If the garage door opener works, it was an issue with those connections.
- If the garage door doesn’t open, replace the wires running from the garage door opener to the switch.
Problem: Failing Remote
If your wall switch works, but your remote won’t open the garage door, there could be a few explanations. For one, the batteries in the remote might be dead. Another issue could be that the remote lost its programming. And lastly, it could be the receiver in the garage door opener itself.
Solution 1: Replace the Battery
Let’s start with the simplest fix: Replace the batteries in your remote. In many cases, this will immediately solve the issue. If not, move on to the next solution.
Solution 2: Reprogram the Remote
If replacing the battery didn’t work, the following step is a free way to ensure the issue isn’t your remote. Simply find your opener’s user manual (if you lost yours, you may be able to find one online) and flip to the reprogramming section. This usually involves holding a button on the garage door opener while pressing the remote’s buttons.
If that doesn’t work, buy a replacement remote that’s compatible with your garage door opener and program it. If that doesn’t work, move on to the receiver replacement.
Solution 3: Install a New Receiver
Your garage door opener has a receiver inside, and it could be failing. Rather than replacing that unit, you can buy an external unit that’s very easy to install:
- Install the receiver on the ceiling above the garage door opener following the manufacturer’s directions.
- Run the included wires from the receiver to the same terminals as your remote wire. Make sure to staple or tie-wrap the wires out of the way of any moving parts.
- Plug the receiver into the ceiling outlet.
- Program the remotes.
Problem: Door Only Closes When You Hold the Wall Switch
If your garage door opener starts to close, then stops and retracts, or it only closes when you hold the wall switch down, you probably have an issue with your safety sensors. These sensors are at the bottom of the garage door opening and fire a laser across to one another. If that laser isn’t working, it means something is in the way (or you have a problem with your sensor). This is a common garage door repair.
Solution 1: Check the Sensors
- First, check to make sure there isn’t anything in the way of the sensors. There will be one on each side of the door, and if anything (a sports ball, a piece of lumber, or even a leaf) blocks one of them, the garage door won’t work.
- Check for a light on both sensors. This means they’re receiving power. Both should be solid. If one is blinking, your sensors may be out of alignment.
- Check the wires that attach to the back of the garage door sensors to make sure they’re secure.
Solution 2: Align the Sensors
Here’s what to do if your sensors are out of alignment:
- Wrap a string around both brackets. It should be tight but not so tight that it pulls the brackets together.
- Check the sensors’ alignment to the string. They should be parallel to the string.
- If the sensors are parallel, adjust their up and down angle by loosening the wing nut slightly and tweaking the position until the light is solid.
Problem: No Lights, No Movement
If your garage door opener won’t light up, click, or otherwise operate at all, you may have an issue with the power supply to the garage door opener. Another possible reason is that the garage door opener’s circuit board has failed and needs to be replaced.
Solution 1: Check the Power Supply
First, make sure there is power to the garage door opener. The easiest way to do so is to use a non-contact pen tester and check the outlet. Or you can plug another device into the same outlet and see if it operates. If it does, switch the garage door opener to the receptacle that works and see if it operates. If so, there’s an issue with the receptacle and you should replace it.
If there’s no power at all, check the breaker. The garage door might’ve tripped the breaker. Flip it back on and test the garage door. If that doesn’t work, it might be the circuit board.
Solution 2: Replace the Circuit Board:
- Unplug your garage door opener and open its plastic cover (not just the panel in the back that hides the wires). The green circuit board should be on display.
- Before removing anything, take a picture of where all the wires and plugs go.
- Remove the wires and plugs and remove the circuit board.
- Locate the circuit board’s part number and order a new one from the manufacturer.
- Reverse the steps to install the new circuit board and reinstall the garage door opener cover.
- Plug the garage door opener back into the outlet and test its function.
Problem: Light Doesn’t Work
Your garage door opener will usually have a light bulb that illuminates when the garage door opener is activated. If it’s not working, the bulb is either burned out or the socket itself has degraded and stopped functioning.
Solution 1: Replace the Light Bulb
First, try replacing the light bulb. Open the plastic light cover and unscrew the bulb. Replace it with a new bulb and activate the garage door opener to see if it works. If the light works, replace the cover. If not, you’ll need a replacement socket.
Solution 2: Replace the Socket:
You can find replacement sockets at most home improvement stores near the garage door openers.
- Unplug the garage door opener.
- Remove any of the internal items preventing access to the socket.
- Release the retaining clip that holds the socket in place and pull the two wires off the contacts.
- Attach the wires to the end of the socket and snap it into place.
- Replace any items you removed and plug the garage door opener back in.
Problem: Opener Grinds but Doesn’t Open
One of the most common reasons homeowners replace their garage door openers is they start grinding and won’t open the door. While this sounds catastrophic, the solution is usually replacing just one part: the main gear drive.
Solution: Replace the Main Gear Drive
This repair is a little more involved than the others, but if you take your time and take pictures as you go, you should be able to replace your gear drive in about an hour.
- Unplug the garage door opener.
- Remove the cover from the garage door opener.
- Remove the power leads from the capacitor (the cylinder with two power leads attached to it) and remove the motor assembly (just a few bolts).
- Unbolt the main gear drive assembly from underneath the garage door opener.
- Drop the new gear drive assembly into the garage door opener and bolt it into place.
- Reinstall the motor assembly and reattach the wires to the capacitor.
- Reinstall the cover.
Problem: Door Won’t Open All of the Way
A garage door that doesn’t open all the way, but otherwise operates properly, could have one of two issues: Slack in the drive chain or a limit that needs to be adjusted. Both are relatively easy to do on your own.
Solution 1: Tighten Chain Slack
Let’s start with the chain slack (this may work for belt-driven openers as well).
- Measure the distances between the chain and the rail. It should be between ¼ and ½ inch.
- Locate the adjustment screw on the trolley.
- Loosen the nut on the opener side of the trolley bracket.
- Tighten the nut on the opposite side of the trolley bracket until the chain is above the rail by ¼ to ½ inch.
Solution 2: Adjust Limits
If the above doesn’t solve the issue, you may need to adjust your limits. These tell the garage door where to stop.
- Locate the adjustment dials on the side of the garage door opener. The open travel adjustment will have an up arrow.
- Turn the screw in the direction of the arrow to increase the limit, allowing the door to open further. Make small, ½-turn adjustments.
- Run the garage door opener through an entire cycle to see if the door needs to be adjusted further.
Problem: The Garage Door Closes, But Reopens
If your garage door closes and then reopens, this issue is probably the close limit adjustment. The process for adjusting it is the same as above.
Solution: Adjust Close Limit
- Locate the adjustment dials on the side of the garage door opener. The close travel adjustment will have a down arrow.
- Adjust the dial to stop the door sooner by turning it against the arrow. Use small, 1/2-turn adjustments
- Run the garage door through an open-close cycle to test how it closes and see if it needs to be adjusted further.
Don’t Forget to Lubricate the Parts
With these how-to guidelines, you should be able to diagnose and repair most garage door opener issues. But don’t forget to use a lubricant on the chain or worm drive, pulley, and other moving parts. A bit of silicone grease can help a garage door opener remain working its best for as long as possible. But, if your door does have a problem, you’ll know just how to fix a garage door opener with this guide.
