Expert Advice for Home Improvement & DIY Repair
Humidifier Doesn't Run
When a humidifier doesn’t run, it generally means it isn’t receiving electrical power or the controls have automatically shut it off. Do the following to source the problem:

1) Be sure the humidifier is plugged into an outlet that works and that the unit is turned on. Check the electrical receptacle for power using a working lamp, appliance, or voltage tester. If the receptacle seems to be dead, check the circuit breaker or fuse that serves the humidifier’s circuit.

2) Check the setting on the humidistat. If it’s set lower than the room’s relative humidity, the humidifier won’t go on; in fact, it may take several hours for the humidistat to respond to the room’s changing humidity.

3) Be sure the humidifier’s reservoir is full of water.

4) Unplug the humidifier unit. Check the power cord, and, If necessary, repair or replace it.

5) Remove the humidifier’s cover panel. Remove the humidistat and check it as described in “Troublershooting & Repairing a Humidifier.” Replace it if necessary.

6) If the humidifier still doesn’t work, call an appliance repairperson, take the unit into an appliance repair shop, or replace the unit.
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