20 Most Recent Aprilaire 700 Humidifier Questions & Answers

You may be having problem with air scaping from the base of the hum. it will probably may have to put silicone around the base of the hum. to stop the air scaping.

Aprilaire 700... | Answered on Aug 29, 2018

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....

Aprilaire 700... | Answered on Aug 11, 2017

If over a few years old, you require a kit to service it. The link explains what to do.
Aprilaire 760MAINTKIT Humidifier Model 760 Maintenance Kit

Aprilaire 700... | Answered on Jun 20, 2017

find out how to turn power to unit off.turn unit off for a few minutes then turn power to unit back on this should do a internal reset and display should return to normal.

Aprilaire 700... | Answered on May 31, 2015

I hope this helps you, have the repair person check to see if a furnace filter air freshener was installed at your last furnace check up without your knowledge. Also checked all wall and or floor registers to make sure the source of smell is not coming from them, it may be circulating though the duct system.last thing is to replace media pad in humidifier along with furnace filters, if you have air cleaner wash filters with hot water and baking soda, wipe & let dry before re- installing them. Your repair person may have use a strong smelling cleaning solution in humidifier that is now circulating though out your home, good luck.

Aprilaire 700... | Answered on May 06, 2015

What brand and model do you have for starts. Sounds like a low voltage power issue.

Aprilaire 700... | Answered on Feb 28, 2015

Here is a link for parts to your humidifier http://www.aprilaireparts.com/aprilaire-440-humidifier-parts.html

Aprilaire 700... | Answered on Feb 06, 2015

Is this a newly installed unit it sounds as if there's a wiring issue. Could you show a picture of the wiring terminals. If this is not a new install try turning of your furnace fan.

Aprilaire 700... | Answered on Nov 13, 2014

Hi, Jennifer:

I'm no expert, but those who are seem to agree that the first thing to check is your evaporator panel. Aprilaire recommends replacing it annually--so if you haven't replaced it recently, that would be the first step to take. Next, check the power supply to your Aprilaire unit. Turn the humidistat to 0%, and then turn it slowly back toward 35% until you hear a click at the unit. If you don't hear a click, you'll want to check that the unit is in fact getting electric power (you may want to get an electrician or furnace tech to do this). If you do hear the click, the next thing to check is whether you have sufficient water flow to your Aprilaire unit. On mine, I had to adjust my water supply saddle valve, as well as the inline valve on the discharge side of the solenoid (see prior post from this morning)--and this seemed to clear the lines and restore water flow. Once you achieve proper water flow, you will probably want to set your humidistat at 35% for winter temps of around 20 degrees F--but be sure to adjust it downward for colder weather. Comments, anyone?

Aprilaire 700... | Answered on Aug 04, 2014

Without power applied to the Humidifier, can you spin the fan blade easily? Or does it seem seized?

Aprilaire 700... | Answered on May 17, 2014

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