Why does my heater make a funny or loud sound when I use it? Why does my heater keep shutting off? Here are some common reasons that portable electric heaters shut off: The thermostat on the heater is not set high enough. The heater needs to be reset due to an overheat situation. Consult your owners manual for additional details. If the unit has tip-over safety protection: To reset, simply place the heater in an upright position on a level surface. Why does my heater smell like something is burning? Why is the cord on my heater very warm? Why does my heater keep tripping circuit breakers? What do I do if my heater does not operate? UNPLUG THE UNIT and make sure the heater is placed in an upright position. If the unit has a thermostat, it may be set too low. Turn the thermostat to its highest setting until the heater restarts. Make sure the Selector is in the High, Low, or Eco-Smart(TM) setting. Make sure the electrical outlet or circuit breaker is working.

If you find an obstruction turn the heater OFF, and UNPLUG THE UNIT. Carefully remove the obstruction and follow the reset instructions. DO NOT attempt to open or repair the heater. If your heater is still not operating, please refer back to the troubleshooting section of your user manual. The fan on my heater is running; but there is only cold air coming out of the heater, is that normal? Here are some common reasons why a heater may blow cool air: Some heaters have a fan only setting which will enable the user to use the heater as a fan. If your model has that feature, check to see if the heater is on the fan only setting. If the heater is on one of the heat settings, rather than the fan only setting, then it may have overheated and shut off power to the heater. Follow the reset instructions found on the heater or in the owners manual. With some digital thermostats, the fan will run for 30 seconds without heat once the set temperature is reached. This is to blow out excess heat and ensure an accurate and consistent temperature reading.

If the heater continues to blow cool air after checking the above suggestions, please contact customer support. It looks like there is a slight red glow inside the heater that is especially visible when the room is dark. What should I do if my air purifier is making a noise? Verify that you removed the filter bags.  Verify which fan speed the product is set on.  Higher fan speeds make more noise.  If you hear a rattling or squeaking noise, call customer service. Regarding AeraMax models: If your unit is making a clicking noise that is bothersome, then the PlasmaTrue Technology feature can be turned off.  The PlasmaTrue technology feature on the AeraMax DX5/DX55/DX95 air purifiers can be turned off by pressing and holding down on the PlasmaTrue icon on the touch screen display panel for approximately five seconds.  The PlasmaTrue Technology indicator light will turn off, letting you know that the PlasmaTrue Technology feature on the machine is turned off.  Please note that if you turn off the PlasmaTrue Technology feature, it may reduce the coverage area below the AHAM certified rating.