The device is not plugged in, Please plugin and start the device.

①　The machine is brand new, remove the humidifier from the packaging and let it sit in a well- ventilated area for 12 hours.
②　The water in the tank is dirty, empty the tank and pour in clean water.

①　There is not enough water in the tank, pour more water into the tank.
②　The device has been placed on an uneven surface, operate the device on a sturdy level surface.

The mist nozzle is too dry, Soak the mist nozzle in water for a few minutes. After 30 minutes it will return to normal operation.

Do not add essential oil to the water tank.

The hardness of water is too high, pour distilled or purified water into the water tank.

The humidifier is placed directly on the ground or in a low position, therefore the vapor does not have enough time to evaporate. It is recommended to place the humidifier on a table or chair in a higher position to allow more time to evaporate.

Water may have entered the air channel, follow the cleaning instructions in the user manual to prevent water from entering the air channel.

The plastic insulation sheet isn't removed from the battery compartment, remove the plastic insulation sheet from the battery compartment.

The fan will continue to run 3 minutes after powering off the unit in order to dry the air channel and prevent the growth of harmful bacteria and fungi. The fan will automatically stop after 3 minutes.

The abnormal working temperature of the PTC heater. Unplug the device and clean the water box and PTC heater after the water temperature gets down.

The abnormal working temperature of the atomizing plate. Unplug the device and clean the water box and atomizing plate after the water temperature gets down.

①　The device has not been plugged in. Plug the cord into an outlet. 
②　The device has not been turned on. Press the ON/OFF button to start the device. 
③　There is a foreign matter on the atomizing plate. Clear away the foreign matter. 
④　There is a foreign matter on mist nozzle. Clear away the foreign matter. 
⑤　The water level in the water box is too high; Unplug the device and make sure the water tank cover is covered in right place and the water level in the water box is not too high; Pour out the water and refill the water tank under the guide of the user manual. 
⑥　There is not enough water in the tank. Pour more water into the tank.

①　Water shortage. Fill more water into the water tank.
②　Water level sensor gets stuck by foreign matter (see the "diagram section" No.18) or The float ball gets stuck by foreign matter(see the "diagram section" No.19), Check whether there is a foreign matter in the water box.
③　The water tank is not installed correctly. Reinstall the water tank.

Sleep mode is set. The humidifier won't emit the warm mist in sleep mode. Reset to other working modes.

The activation time of the heating function is not long enough. Make sure the heating function is on, then check the mist 1.5 hours later.

①The hardness of water is too high, pour distilled or purified water into the water tank.
②Please use the dedicated filter of Elechomes UC5501 humidifier. (This filter is available on amazon. Just search ELECHOMES and buy it).

①　Do not add essential oil to the water tank.
②　The cap of the water tank is not installed correctly. Reinstall the water tank.