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Cold and Flu Center

How to Troubleshoot an Aprilaire Humidifier

by
author image Frank Whittemore
In Jacksonville, Fla., Frank Whittemore is a content strategist with over a decade of experience as a hospital corpsman in the U.S. Navy and a licensed paramedic. He has over 15 years experience writing for several Fortune 500 companies. Whittemore writes on topics in medicine, nature, science, technology, the arts, cuisine, travel and sports.
How to Troubleshoot an Aprilaire Humidifier
An Aprilaire humidifier maintains the humidity during colder weather. Photo Credit house image by Cora Reed from <a href='http://www.fotolia.com'>Fotolia.com</a>

Aprilaire manufactures a series of humidifiers that connect to the heating and ventilation system of your house to control the humidity of your entire home. When operating properly, Aprilaire whole-house humidifiers are relatively carefree, functioning automatically. Problems can arise, however. Excessive or inadequate humidity in your home may mean the humidifier is not functioning correctly. According to the Aprilaire owner's manuals, there are troubleshooting steps that you can perform to help identify the problem quickly. In some cases, you may be able to resolve the problem yourself. For other issues, you may need to contact your heating contractor or Aprilaire dealer for assistance.

Step 1

Increase the setting of the control dial by one increment if there is a lack of humidity. Continue to increase the increment, periodically, until you achieve the desired humidity level. If condensation forms on the windows, the level is set too high. Reduce the setting on the control dial one increment at a time until the condensation dissipates.

Step 2

Turn the control dial to the "Test/Reset" position, if the humidifier does not operate. Turn the heating system on so that the system is calling for heat and the blower fan is on. The humidifier should operate for one minute in test mode. Listen for the solenoid to make a clicking sound when you turn the control dial to the "Test/Reset" position. If the solenoid clicks, reset the control dial on the unit to operate at the proper humidity level. If the solenoid does not click, have the unit serviced by an approved heating contractor.

Step 3

Turn the dial to the "Off" position, if the humidifier will not turn off. If the humidifier continues to run, have the unit serviced by an approved heating contractor.

Step 4

Examine the "Call Dealer for Service" light on the front of the control panel. If the red light flashes, note the error code by counting the number of flashes and contact your air conditioning dealer for servicing.

Step 5

Examine the "Change Water Panel" light on the front of the control panel. If the yellow light flashes, replace the water panel in the unit according to manufacturer's instructions. Turn the control dial to the "Test/Reset" position. Wait for the green "Humidifier On" light to flash. Set the control dial to the proper humidity level for normal operation.

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