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Commonly Reported HVAC Problems:

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Humidifier Not Working...

Annoying Static Shock

Humidifier not working, Not enough humidity, My house is too dry, I'm getting static shocks...

Do any of these complaints sound familiar???

Well they are all very common complaints during the winter months. And maintaining a proper humidity level is extremely important for your health, comfort, and well-being, not to mention your home and furnishings. More times than not though, the problem is something most homeowners can take care of themselves, without even calling for service.

aprilaire humidifier, humidifier damper closed

In fact, many times the problem is something the homeowner did, like turning off the humidifier at the end of the last heating season and forgetting to turn it back on again. Or forgetting to open a bypass damper or water valve.

saddle valve for humidifier

Many homeowners often forget that humidifiers need to be cleaned frequently; at least once each heating season, twice if you have hard water.

clogged or blocked humidifier water panel

If the water panel or evaporator pad is clogged with sediment, the unit will not humidify properly. Replace as neccessary.

Assorted Humidifier Parts

Aprilaire Humidifier Panels, General-aire Model 81 drum kit with pad, Model 81 24volt Humidifier Motor, Model 81 Float Assembly

Below is a list of possible causes. Items in red usually require a service call. Items in blue however can be addressed, some even fixed by the homeowner.


Red = Professional fix | Blue = Homeowner fix

  • Clogged water valve
  • Clogged orifice
  • Bad solenoid valve
  • Bad motor
  • Bad humidistat
  • Faulty or shorted wiring
  • Float not working properly
  • Humidistat not turned up high enough
  • Water valve not opened
  • Bypass damper not opened
  • 115 volt unit not plugged in
  • Completely clogged water panel or pad
  • Wheel/humidifier pad installed in motor backwards
  • System taken apart from previous season
  • Water level too low (Rotating Drum type)

Note: The possible causes above apply to different types of humidifiers, which include Power, Bypass, and Rotating Drum types.

Please keep in mind that the information found on our website is provided free of charge and Hannabery HVAC does not assume any liability resulting from the information we provide. We hope this information helps, but please note that these are just rough guidelines, and not all possible situations are covered. Your HVAC system should be inspected and repaired by a trained technician.

Commonly Reported HVAC Problems

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