20 Most Recent Aprilaire 600 Humidifier Questions & Answers


I know of no answer to this except to remove the coating manually to prevent it clogging you filter.

Aprilaire 600... | Answered on Jun 22, 2017


use Google and search for a manual by MAKE and model. possibly also the manufacturer's website .

Aprilaire 600... | Answered on May 10, 2017


Hello, check to make sure that the drain line is not blocked, this could cause the water to back up in the humidifier and leak, also make sure the water panel is clean and free of any mineral deposits.

Aprilaire 600... | Answered on Jul 08, 2015


You should have a #50 relay hooked up to the main blower assembley to turn the 24 volts on and off with the blower to the humidistat. Alot of humidifiers sold do not tell you about the #50 relay. They assume that you are a hvac pro and you aready know about.
Good luck
HVAC Teacher

Aprilaire 600... | Answered on Jul 31, 2014


The filters need to be cleaned my unit tells me to clean the filters about every month and if I dont the unit shuts off to protect it the black stuff is mold which would mean the humidty is to high

Aprilaire 600... | Answered on Mar 10, 2014


Check all wire connections for tightness. Those solenoids on the humidifiers will eventually need to be replaced. Try turning the dial all the way up to the test position if it is still clicking you may just need a new solenoid.

Aprilaire 600... | Answered on Jan 05, 2014

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