If the heater does not turn on, it may have reached abnormal temperatures. If the manual reset trips (which turns the heater off), the heater probably needs to be cleaned or it’s blocked. Be sure heater is wired to the correct voltage (120 volt supply to 120 volt heater). If the heater will not reset and the circuit is good, the heater will need to be repaired or replaced.

An electric heater that blows cold air could be caused by one or more of the following reasons:

  • The manual reset has tripped.
  • The fan switch is “on” and the thermostat setting is below the actual temperature
  • The fan is dispersing this air after shutdown
  • There may be a loose wire coming from the elements
  • The heater element may be defective

Refer to the troubleshooting chart in your Owner’s Guide for more information.

Make sure the voltage supply matches the heater rating and that the heater is clean. If it continues to run slowly, the motor and/or heater may need to be serviced or replaced.

If your wall heater is cycling on and off every 15 seconds, and you are controlling your heater with a digital thermostat, then likely you need to update one of the thermostat settings.

If you have a TH401, in the Set Up Menu, change the Heating Cycle from “Std” to “Fan”.

If you have a TH106, remove the thermostat cover, find Switch 3 and change the factory setting to the right, or the “On” position.

Review the owner’s guide for your specific thermostat for additional details.

If your thermostat is set up correctly or you do not have a digital control and your heater is cycling on and off less than every 5 minutes, you might have too much wattage for the size of the room. Contact our Technical Support team at 855-223-3788 for additional troubleshooting help.