How To Clean Your Humidifier

Your humidifier MUST be serviced at least once per year to provide good service and extend its life. Below are some general tips on what to do. More specific information is available in the on-line owners manual for your specific model. To find your manual locate your brand in the list on the left edge of this page. Click on your brand and then on the page for your brand click on your particular model. You should find a blue button labeled OWNERS MANUAL on that page. Click on that OWNERS MANUAL button and you will be able to download a free copy of your specific owners manual. If you are unable to locate yours email us for a free copy.


1. Turn off the water to the humidifier.

2. Turn off the electricity to the furnace and the humidifier.

3. Disassemble humidifier & wash out the components that are exposed to water.

4. Replace humidifier filter.

5. Reassemble humidifier and turn water and electricity back on to furnace and humidifier.

6. Test operation of humidifier and look for water leaks.



1. Turn off the manual water valve to your humidifier. It is usually a small saddle valve bolted onto your copper water line near your water heater. 

2. Close the manual bypass damper (if your model has one).

3. Turn the power off to your furnace or air handler.

4. Set the humidistat at its lowest setting to prevent the humidifier from turning on.

5. Take the cover off of your humidifier and remove the humidifier filter.

6. Throw away your old humidifier filter and remove all the internal components that came into contact with water and wash them off. For items that are coated with scale you can soak them in household white vinegar overnight. This will loosen the scale and make it easier to remove. It may be necessary to lightly scrub some items with a bristle brush to remove the scale deposits. Rinse those pieces off with fresh water when done.

7. Replace the humidifier filter with a new one and reassemble the humidifier.

8. Leave the water turned OFF, the bypass damper turned off (if your model has one).

9. Turn the power back on to the furnace or air handler.

10. Your humidifier is now cleaned up and ready for next winter.


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