You may have the heater temperature set too low. Check your temperature setting using the display buttons. For more information, please refer to [ Holmes HEH8031 Troubleshooting|Heater Troubleshooting Page]

Make sure your heater is positioned in the upright position, and then check the powercord for any bent prongs or frayed spots. If you find any of these, you might have to replace the cord. For more information, refer to [ Holmes HEH8031 Troubleshooting|Heater Troubleshooting Page]

Try wiggling the buttons and see if that helps. For more information, refer to the troubleshooting guide! [ Holmes HEH8031 Troubleshooting|Heater Troubleshooting Page]