A universal remote works by learning the infrared codes your devices use, then storing them so one remote can control everything
A universal remote is a single remote control that can operate multiple devices — your TV, soundbar, streaming box, or cable box — instead of juggling three or four remotes. It does this by transmitting the same infrared signals (invisible light pulses) that the original remotes send. When you point it at a device, the device receives the signal and responds the same way it would to its own remote.
The connection process depends on what type of universal remote you have. Some remotes come pre-programmed with codes for hundreds of common devices. Others require you to manually teach the remote which codes to use by pointing the original remote at it. A few newer models use Bluetooth or WiFi instead of infrared, which works differently but follows the same basic idea: the remote learns what signals your devices understand.
Key Takeaways
- Most universal remotes use infrared and need a clear line of sight to the device you are controlling — they cannot work through walls or closed cabinet doors.
- Pre-programmed remotes let you enter a device code from a list or search function, while learning remotes require you to point the original remote at them to record the signals.
- The device code is usually a three- or four-digit number printed in the remote's manual or found by searching the manufacturer name and model number online.
- If the remote does not control a device after you enter the code, try a different code for that brand — manufacturers often use multiple codes for the same product line.
Setting up a pre-programmed universal remote
Most universal remotes sold today come with a list of device codes already stored in memory. You find the code for your TV or cable box, enter it into the remote, and the remote is ready to use. The manual that comes with the remote will have a code list, or you can search online for the remote model number plus "code list" to find a PDF.
To enter a code, you typically press a setup button (sometimes labeled "Mode" or "Setup") until a light on the remote blinks, then type the three- or four-digit code using the number pad. The light will blink again or stay steady to confirm the code was entered. Point the remote at your device and test a button — if the device responds, the code worked. If nothing happens, try the next code listed for that brand.
Some newer pre-programmed remotes skip the manual code entry and let you search instead. You press a button, the remote asks you to say or type the brand name (Samsung, LG, Roku, etc.), and it walks you through a series of test commands. You press "yes" when the device responds correctly, and the remote locks in that code. This method is slower but more reliable because you confirm the code works before finishing setup.
Setting up a learning universal remote
A learning remote records the infrared signals from your original remotes instead of using a pre-programmed code list. This approach works with almost any device, including older equipment or devices with unusual remotes. The trade-off is that setup takes longer because you have to teach the remote one button at a time.
To teach a learning remote, you usually press a "Learn" button on the remote, select which device you want to program (TV, soundbar, etc.), and then point your original remote directly at the learning remote's sensor (a small window, usually on the front or top). Press a button on the original remote — for example, the power button — and the learning remote records that signal. Repeat this for every button you want to use. Most people program power, volume up and down, channel up and down, and input or source selection, then stop.
The sensor on a learning remote is sensitive and needs a direct line of sight to the original remote. If the signal does not record, try moving the original remote closer or pointing it more directly at the sensor. Some learning remotes have a small LED that blinks when a signal is received, which helps you know if the teaching worked.
Bluetooth and WiFi remotes: a different approach
Newer universal remotes, especially those designed for streaming devices like Roku, Apple TV, or Amazon Fire Stick, often use Bluetooth or WiFi instead of infrared. These remotes do not need a line of sight to the device — they can work through walls or from another room — because they connect directly to the device's wireless receiver.
Setup for a Bluetooth remote usually means pressing a pairing button on the remote, then pressing a pairing button on the device (or in the device's settings menu). The two devices find each other and connect, similar to pairing wireless headphones. Once paired, the remote sends commands over Bluetooth rather than infrared. WiFi remotes work the same way but connect through your home network instead.
The advantage is convenience and range. The disadvantage is that Bluetooth and WiFi remotes only work with devices that have Bluetooth or WiFi receivers — they cannot control older TVs or cable boxes that only understand infrared. Some universal remotes combine both technologies, using Bluetooth for newer devices and infrared for older ones.
Troubleshooting when the remote does not respond
If you entered a code or taught the remote a signal but the device still does not respond, the most common cause is that the infrared signal cannot reach the device. Make sure there is nothing blocking the path between the remote and the device — no furniture, curtains, or closed cabinet doors. Infrared light travels in a straight line and cannot bend around obstacles.
The second most common cause is the wrong code. Even within a single brand like Samsung, different TV models may use different codes. Go back to the code list and try the next Samsung code listed. If you are using a learning remote, try recording the signal again, this time holding the original remote closer to the sensor and pointing it more directly.
For Bluetooth remotes, check that the remote is still paired. If the remote worked yesterday but not today, try re-pairing it by pressing the pairing button again. If the remote never worked, make sure the device actually has Bluetooth — some older streaming boxes do not, even if they look modern.
Keeping your remote working over time
Universal remotes are reliable once they are set up, but a few habits help them last. Replace the batteries every six months to a year, or when you notice the remote has to be pointed more directly at devices to work — weak batteries reduce the infrared signal strength. Keep the sensor window (the part that points at devices) clean and free of dust, since a dirty sensor weakens the signal.
If you have a learning remote, write down which buttons you programmed and what signals they control. If the remote gets reset or the batteries die for an extended period, you may lose the learned signals and have to teach them again. A quick note saves you from re-recording everything.
Frequently Asked Questions
Can a universal remote control my TV if it is inside a cabinet with the door closed?
No, not if the remote uses infrared. Infrared light cannot pass through solid doors or walls. If your TV is in a closed cabinet, you need either a Bluetooth remote, a WiFi remote, or an infrared repeater (a small device that sits inside the cabinet and sends the signal wirelessly to a receiver outside). Streaming devices like Roku or Apple TV often support Bluetooth remotes, which work through cabinet doors.
What if my device brand is not on the code list?
Search online for the remote model number plus your device brand and model number plus "universal remote code." Many code databases exist outside the manual. If you still cannot find a code, try a learning remote instead, or contact the universal remote manufacturer — some offer phone support to help you find the right code.
Can I use one universal remote to control multiple TVs in different rooms?
Yes, if the remotes use Bluetooth or WiFi, because you can pair the remote to each device separately and switch between them using a device selector button. If the remotes use infrared, you can only control one TV at a time because infrared signals go in a straight line — you would have to point the remote at each TV separately. Some people buy multiple universal remotes, one for each room.
Do I need to reprogram the remote if I move to a new house?
No. The codes and learned signals are stored in the remote's memory, not tied to your location. As long as you bring the remote with you, it will work the same way in your new house. The only exception is if your new devices are different brands or models — then you would need to add new codes or teach new signals for those devices.
Why does my universal remote work sometimes but not other times?
The most likely cause is weak batteries. As batteries drain, the infrared signal becomes weaker and only works when you point the remote directly at the device from close range. Replace the batteries and test again. If the remote still works inconsistently, the sensor window may be dirty — clean it gently with a soft, dry cloth.