An Aprilaire 600M humidifier attached to my HVAC vent is leaking very slowly, about 2 ounces per day. I have not seen it leak but the leak is coming out near the exhaust at the bottom of the plastic insert (see first pic below).
This is what I have tried.
- Inspect the housing for cracks
- Make sure the plastic insert is seated properly
- Pour water into into plastic insert to see if it is leaking
- Pour water into the pipe where it exits the humidifier to be sure the exit piping is not clogged.
- Change the water panel
I noticed some white crumbly stuff at the bottom of the humidifier (see second pic below)
What else can I do to prevent the leak?
I opened the humidifier cover and turned up the humidistat so that I could see what was happening when the water flowed. I saw water dripping at the bottom corner, originating about 1/2 up the side. (see third pic below)
I slipped in a thin wooden shim so the panel was not leaning against the holder (the tray) and the drip stopped. (See fourth pic below.)
I do not see how to put in the panel so it does not lean against the tray. Any help would be appreciated.