Question about Aprilaire 600 Humidifier
New humidifier. Installed 11/15/08. Worked great until today.
I have the same type of Aprilaire humidifier unit with automatic temperature sensing control. My unit also displayed the 'E3' code. The HVAC technician was on site today and replaced the temperature sensing unit that is located outside the house. The humidifier is functioning normally once again.
Posted on Jan 07, 2009
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Posted on Jan 02, 2017
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