Question about Slant Fin Warm Mist GF-210 Humidifier

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Er3--is this an error message?

I bought this humidifier a couple of weeks ago, and now the digital panel just reads "Er3" instead of the humidity level, Hi/Lo etc. I cannot find in the accompanying manual what this means. Unplugging it and plugging it back in did not work. Then I tried emptying it out and refilling--it briefly went back to normal display but then back to the Er3 again. What do I do?

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Re: Er3--is this an error message?

This sounds like the float switch may be stuck - giving an error message - usually these are not too hard to unstick - it is often a cleaning issue - the manual should show you where the float switch is and how to check it, but if the error message is not listed in the manual, if you are sure it is the correct manual then I would expect it to be a technicians job, else they would list the error message. Slant/Fin has sold the humidifier and PC-55 air purifier business to KAZ USA Inc. If you need replacement parts, repairs, or have any questions regarding the products, please contact them at: KAZ, Consumer Relations Dept. 250 Turnpike rd., Southborough, MA 01772 Phone: 800-477-0457 email: also worth a look is: seems to be best forum for humidifier stuff Hope this helps :)

Posted on Mar 01, 2007

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HI, Troubleshooting an Aprilaire Humidifier

Aprilaire, a manufacturer of indoor air quality products including thermostats, air cleaners and dehumidifiers, also offers a line of whole house humidifiers. Installed in your existing heating and cooling system, humidity is produced by a supplied water source that flows over a water panel before being distributed throughout your air through the heating and cooling system. Issues you may need to troubleshoot with your Aprilaire humidifier include error messages and the unit producing too little or too much humidity.

Things You'll Need:

Replacement water panel

Turn down the control dial by one setting if condensation appears on your windows or walls.

Turn up the control dial by one setting if there is a lack of humidity, often indicated by dry skin or peeling wallpaper or paint.

Turn the control dial to "Test/Reset" if the humidifier does not run. Verify the heating and air conditioning unit blower is operating. If the heating and air conditioning unit is not operating or you are unable to resolve the issue contact a heating contractor.

Contact a heating contractor if you turn the control dial to "Off" and the humidifier continues to run.

Contact your Aprilaire dealer (see Resources) if you notice an error code on the display and the "Call Dealer for Service" light flashes.

Turn the control dial to "Off" and turn off the water supply if the yellow "Change Water Panel" light flashes. Lift the front panel off of the humidifier. Slide out the water panel. Insert a new water panel. Replace the front cover. Turn the control dial to "Test/Reset" until the "Humidifier On" light flashes. If you feel uncomfortable changing the water panel, contact a heating contractor.

Tips & Warnings

Purchase replacement water panels through your Aprilaire dealer or a heating contractor.

You can get parts from the link below:

Hope it helps.

Thanks for using fixya....

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I try to keep the level at 30-35% in the winter.

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We had this problem and could not make it go away by refilling, jiggling the float and so on. All the controls appeared frozen during this time.

But unplugging the humidifier for 5 minutes and plugging it back in seems to have fixed it -- no ER3 message now (fingers crossed!0.

Apr 25, 2007 | Slant Fin Warm Mist GF-210 Humidifier

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