Humidifier Troubleshooting Guide

Potential Cause Resolution
Humidifier is leaking water
  1. Humidifier pad has not been properly installed.
  2. Humidifier is not draining.
  3. Leaking at water connection fittings are not tightend properly.
  4. Water is not staying on pad or is coming into the humidifier too fast.
  5. Heavy mineral build up on evaporator pad.
  1. Black mark should be located at the top of the evaporator pad.
  2. Check for a kink/debris in the drain line.
  3. Tighten all water line connection points.
  4. Check that the metering/orifice is in place. Yellow or Orange depending on the model.
  5. Replace pad. 
Humidifier runs all the time
  1. Humidistat is in the on position.
  2. Humidifier is wired incorrectly.
  3. Wires are touching one another.   
  1. Turn the humidistat down to a lower set point.
  2. Check all wire connections and go over the wiring of the unit.
  3. Check the wire connections to ensure that two wires are not touching one another.
Not providing proper humidity to the home.
  1. By-pass damper is closed.
  2. Humidistat is off.
  3. Lack of water coming into the evaporator pad.
  4. Humidifier sizing is not correct.
  5. Evapoprator pad is near the end of it's life.
  6. Humidifier is connected to cold water.
  7. Short run time.
  1. Turn the by-pass damper to the (OPEN) or (WINTER) position.
  2. Turn the humidistat up to a desirable position for proper humidification levels in the home.
  3. Check the strainer on the inlet of the solenoid valve for debris. Also, check the orifice on the outlet of the solenoid valve, to see if thier are any obstructions.
  4. Check the output rating of the humidifier and compare that to a humidification load calculation.
  5. The evaporator pad should be changed once every season to obtain peak performance.
  6. Try hooking the water supply to the hot water line for an increase of humidity.
  7. The humidifier has not run enough to raise the relitive humidity in the home. It typically will take a minamum of two weeks to notice an improvment in the humidity level within the home. 
Humidifier is not running
  1. No demand for the heating cycle and or the blower operation.
  2. Setting on humidistat is below the home's current humidity level.
  3. Power loss to humidifier.
  1. Turn up the heat above the current set point on the thermostat, then turn up the humidistat to the (ON) postiton and check to see if the humidifier is running.
  2. Increase the humidity set point on the humidistat to a higher setting.
  3. Check for a loss of power at the solenoid valve or the humidistat.
No water
  1. No demand for the heating cycle and or the blower operation.
  2. Reached the setpoint of the humidistat.
  3. Power loss to humidifier.
  4. Plugged water line.
  1. Turn up the heat above the current set point on the thermostat, then turn up the humidistat to the (ON) position to verify humidifier operation.
  2. Turn up the set point of the humidistat for operation or to increase the humidity level in the home.
  3. Check for a loss of power at the solenoid valve or the humidistat. 4. Check water line at varius connection points to see where the obstruction is and  correct the issue,
Not providing enough humidity
The wrong humidifier has been installed.
  • Model 220500/220550 0-2,856 sq ft.
  • Model 220600/220650 0-3904 sq ft.
  • Model 220700/220750 0-4,214 sq ft.