Problem What to look for What to do
Water leakage
Leaking joints. Shut off water. Tighten connections.
Brass tubing inserts Verify that brass tubing inserts are used.
Saddle valve leaking. Verify rubber pad is installed on saddle valve.
No water to drain.
Electrical Verify control circuit wiring. Check all connections.
Humidistat
Turn humidistat up and down and listen for
contact to click.
Humidifier power Verify that outlet has power.
Solenoid
After verifying other wiring components, turn on
furnace fan, turn humidistat up and down, and
listen for solenoid to click.
Plumbing Verify plumbing connections. Check for kinks.
Saddle valve
Verify that needle pierces water line and then
backs out needle to open valve.
Humidifier
Remove cover and verify that water flows into
distribution tray.
Drain tubing Verify no obstructions.
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