Garage door remote and keypad batteries
How to tell if a weak battery is why your garage door remote or keypad quit, how to swap a coin cell safely, and when the problem is not the battery.
A weak battery is one of the most common reasons a garage door remote stops working, and it is a safe fix you can do yourself. This guide covers how to confirm it, how to change the battery, and what to do if a new battery does not help.
Is it the battery? Start with the wall button
The first test costs nothing. Press the wall button inside the garage. If the door moves from the wall button but not from the remote, the opener and the door are working and the problem is in the remote, its battery, or how it is paired to the opener.
If the wall button does not work either, the battery is not the cause. Skip ahead to the section on when to stop and bring in a technician. See also garage door opener not working for a safe troubleshooting order.
Signs of a weak remote battery are a shorter working range, a remote that works only when you stand close to the garage, or one that needs several presses. Keypads can do the same. If every remote and the keypad all fail at once, suspect the opener side instead of the batteries.
What batteries these remotes use
Many handheld remotes use a small 3V lithium coin cell. Chamberlain, the maker of LiftMaster and Chamberlain openers, says most of its remote models use a 3V CR2032 coin cell, while a few models use AAA batteries. Genie also documents CR2032 coin cell replacement for its Intellicode remotes.
Do not guess. Remote models differ, and wireless keypads are separate devices with their own battery and cover. Check your remote's or keypad's manual, or read the number printed on the old battery, before you buy a replacement.
What you can safely check
Changing a remote battery does not involve the door, the springs or the opener hardware. It is a safe task as long as you treat the small battery with care. Do it with the door at rest and nobody underneath it.
- Look at the back of the remote. If there is a small screw, loosen it with a Phillips screwdriver. If there is no screw, there is usually a seam where the case pries apart.
- Open the case gently at the seam. Go slowly so the plastic does not crack. Some remotes have a small side switch that is easy to lose, so keep track of it.
- Note which side of the old battery faces up before you remove it. Push the battery out toward the nearest edge.
- Put in a new battery of the same type with the positive (+) side facing the way the old one did. On many coin cell remotes that is up, but confirm for your model.
- Close the case and, if there is a screw, snug it only enough to hold the case. Overtightening can crack the plastic.
- Press the button with the door clear and in view. Stay out of the path of the door until you see it move.
Keep coin cells away from children
Chamberlain's battery instructions say to keep batteries away from children and to get medical attention immediately if one is swallowed. Do not recharge, take apart, heat or burn batteries, and dispose of old ones properly. Store spare coin cells out of reach and tape over or bag the old one right away.
Other reasons a remote or keypad stops working
If a fresh battery does not fix it, work through these in order. Steps differ by brand and model, so check your model's manual before pressing any programming button.
- Lock mode. Some openers have a lock or vacation setting on the wall control that makes the opener ignore remotes. Chamberlain describes it as a Lock button on the wall control, with the opener lights flashing twice when you press a remote. Check your model's manual for how to turn it off.
- Corroded or dirty battery contacts. Chamberlain advises checking the contacts for corrosion when you change the battery. Look, do not scrape with metal tools.
- Lost programming. If the opener's memory was cleared, remotes must be programmed again. Chamberlain says pressing and holding the learn button until its LED turns off can erase every programmed remote and keypad. Do not hold that button unless you intend to erase and reprogram everything.
- A second remote. Try another programmed remote. If it works, the first remote is the issue. If none work, look at the opener.
- Interference or distance. If the remote works only up close, the battery is the most likely cause, but check your manual for other range notes.
Remotes also wear out. Buttons can stop registering, and cases can crack or get wet. If a new battery and a reprogram do not help, the remote may need replacing. For a deeper walk-through, see garage door remote or keypad stopped working.
Keeping the batteries from catching you out
Change remote and keypad batteries before they fail. Adding it to your seasonal checks is an easy habit; the annual garage door maintenance checklist is a good place to add it. Keep one spare coin cell of the right type somewhere safe and out of children's reach.
If you are locked out because the keypad is dead, remember that a keypad usually only signals the opener. A dead keypad does not mean the door is broken. If the garage has no other entrance, check your opener's manual, because some models offer an outside release option.
A remote that opens the door is also a remote that opens your garage. Keep spare remotes out of the car if the car is parked outside, and keep remotes away from children, who should not use them as toys.
When to stop and bring in a technician
Battery changes are homeowner work. These situations are not:
- The wall button fails as well as the remote and keypad, and the opener shows no light or sign of power.
- The motor runs or hums but the door does not move, or the door moves unevenly. See opener hums, door will not move.
- You heard a bang, the door looks crooked, or a spring or cable looks damaged. Do not operate the door by remote, wall button or by hand, and keep clear of the springs, cables and brackets.
- The door reverses or stops partway after the remote works.
- You are not sure whether the opener or the remote is at fault.
Our technicians inspect the door and opener, confirm the cause first, and repair or replace openers, sensors and related parts. See opener repair and opener installation. If a new door opener is on the table, repair or replace an opener explains the trade-offs.
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Questions and answers
How do I know if the remote battery is dead?
If the wall button works but the remote does not, a weak battery is the likeliest cause. A shorter range or needing several presses is a common early sign. Replace the battery with the type your model's manual lists.
What kind of battery does a garage door remote use?
Many use a 3V CR2032 coin cell. Chamberlain says most of its remote models do, and some use AAA batteries. Check your model's manual or the number on the old battery.
Do I have to reprogram the remote after changing the battery?
Usually not. Programming is stored in the opener, and the remote keeps working with a fresh battery. If it does not respond, check your model's manual before pressing any learn button, because holding it can erase every remote.
What if I swallowed or a child swallowed a coin cell?
Get medical attention immediately. Keep coin cell batteries, new and used, away from children.
The remote and keypad both stopped at the same time. Is that the batteries?
Two devices failing at once points to the opener or its settings, such as a lock mode or cleared memory, more than to two dead batteries. Check your model's manual, and if the wall button fails too, have a technician look.
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