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Troubleshooting: Light sources


Adding and syncing

How to get the bulbs back in sync

Light sources can become out of sync when you interact with the main power switches (wall or lamp switches) with part of your connected light bulbs. For example, when you turn one light bulb in a group OFF with the power main switch and change the rest of the light bulbs in the group to another state, the turned-off light bulb will be out of sync when turning it on again with the power main switch.

    Related videos:

    • How to sync on/off function

      If your light source becomes unsynchronised, press and hold the ON/OFF button on your remote control for at least 3 seconds. This will return the light source to its default setting (100% brightness, 2700K), or you can dim up until all the light sources have reached 100% brightness.

      • How to sync brightness

        If your light sources become unsynchronised and are set to different brightness levels, press and hold the dim up button on your Remote control or dim up with your Wireless dimmer until they reach the same level of brightness and are synchronised again.

        • How to sync colour temperature

          If your light sources become unsynchronized and are set to different colour temperatures, press the ON/OFF button on your remote control for more than 3 seconds. They will sync up again.


          The bulbs that are in the kit do not fit the sockets I have at home. Are there other kits/bulbs?

          • Yes, you can choose from five different TRÅDFRI LED bulbs that are sold individually – warm white opal big socket size (E26, E27), white spectrum opal small socket size (E12, E14, E17), white spectrum opal big socket size (E26, E27), white spectrum clear big socket size (E26, E27), and white spectrum GU10. You can also choose from four different pre-packed kits that include the most frequently used bulbs. Visit ikea.com or the IKEA store to see the full offer.

          Can I use normal wall circuits to steer my Smart lighting products?

          • Yes. The main power switch will work, but only for turning lights on and off, not for dimming or changing colour temperature.

          Can individual light sources have different brightness levels?

          • Yes, you can either use the TRÅDFRI app or you need a remote control or a wireless dimmer for each light source.

          I have more than one bulb connected to my motion sensor and they’ve become unsynced. How can I sync them again?

          • To get your light bulbs back to sync you need to turn off all connected light sources and then turn them back on.

          I added a white spectrum light bulb and I don’t understand how I can change the colour with the wireless dimmer.

          • You can’t change colour with a wireless dimmer. To be able to change colour, you need to pair your light bulb with a remote control.

          I’m having trouble adding a light source to my TRÅDFRI system.

          I’ve installed my lights, but when I try to pair them a different light responds.

          • If you have a light source with more than one light bulb that sits close together, you need to pair them one by one. Install your first light bulb, pair it and then remove it. Then install the second light bulb, pair it and remove it, etc. Do this with all of the light bulbs, installing all when you’re ready.
            You can also watch a film for instructions: 'Getting started: Add several bulbs'

          What do I do if my TRÅDFRI light bulbs aren’t responding to the steering device?

          • You always need to have a steering device to be able to control your light bulb. If you purchased the light bulbs separately, you need to pair them to the steering device one-by-one. You can also watch a film for instructions: 'Getting started: Add bulbs, doors and panels'

          Why are my light sources out of sync?

          • Light sources can become out of sync when you interact the main power switches (wall or lamp switches) with just part of your connected light bulbs, e.g. when you turn one light bulb in a group OFF with the power main switch and change the rest of the light bulbs in the group to another state, the turned-off light bulb will be out of sync when turning it on again with the power main switch (see above).

          Can I turn my light on and off also without using a smart device?

          • Yes, you can use the main power switch, steering device or the TRÅDFRI App.

          I have installed a motion sensor, but the light does not turn on when I move?

            1. Secure that the lamp connected to the motion sensor main power is on.
            2. Secure that the batteries are inserted in correct direction, with the IKEA logo (plus sign) facing upwards.
            3. If you bought a kit it’s already paired. If you add additional lights you need to pair them with the motion sensor: Add a light bulb to the TRÅDFRI motion sensor
            4. Is the dial on “Night” or “Day“? If the dial is on “Night” and it’s light outside, then nothing will happen.
            5. Have you installed the motion sensor so that the sensor is directed where the motion will be, in the range of 120 degrees / 5m (16,5’)?
            6. If you still have a problem, do a factory reset of your products and try again. 

          I have added a white spectrum bulb to my motion sensor. How do I set the cold/warm temperature?

          • You can do it in the TRÅDFRI App, meaning that you need to have a Gateway. You can control brightness and temperature in the TRÅDFRI App. Then, when the motion sensor is activated, the bulb will turn ON to whatever settings were created in the app.

          What happens to the system if one of my TRÅDFRI LED bulbs breaks?

          • The rest of your light bulbs will still work.


          Power and resetting

            Reset TRÅDFRI gateway to factory default settings

            Open and remove the Gateway lid. Push a pin into the pinhole on top of the Gateway for at least 5 seconds until the LED light stops flashing.

              Reset TRÅDFRI bulbs to factory default settings

              Toggle the main switch 6 times.

                Reset TRÅDFRI remote control to factory default settings

                Press the pairing button 4 times within 5 seconds.

                  Reset TRÅDFRI dimmer to factory default settings

                  Press the pairing button 4 times within 5 seconds.

                    Reset TRÅDFRI motion sensor to factory default settings

                    Press the pairing button 4 times within 5 seconds.


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