My model 400 Aprilaire humidifier is not running in normal conditions, suggestions?

Consumer question:
 
Water flows and humidifier on light comes on only in reset mode but humidifier does not come on and activate water flow in normal mode. I have turned dial to max humidity but still does not activate water flow when furnace comes on. I am running in automatic mode with wiring installed per installation manual. I have the outdoor sensor installed but not run outside yet. Please advise. Thank you
 
Aprilaires' response:

Thank you for your email regarding your model 400 Aprilaire humidifier. If the outdoor sensor is in an area where the temperature is above 60F the humidifier will only run in the test mode. You may confirm this by moving the manual/auto switch to the manual position. This will allow the control to work off the manual sensor on the control rather than the outdoor sensor.
 

 

0 thoughts on “My model 400 Aprilaire humidifier is not running in normal conditions, suggestions?

  1. Joe

    I have a similar issue except my unit is set to manual mode. It used to work fine, but now water only flows in test mode. Otherwise, the pad and floats remain bone dry.

    Reply

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>