Aprilaire 700 Humidifier - Answered Questions & Fixed issues

Install new water panels yearly. On the new panel make sure that the painted dot on the edge of the panel is on the top when you install it.
Always clean the distribution tray and the frame. Make sure the notch on the edge of the distribution tray faces away from the furnace. Make sure the humidifier was installed level. Keep the drain tube opening clear. Insure there is no blockages in the drain tube.
Good luck
HVAC Teacher

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.

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.

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:

arnoldservice.com/humidifier_parts.htm


Hope it helps.

Thanks for using fixya....

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.

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

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

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

Yeah they do need to be replaced from time to time. Make sure you get a water test kit and check your water hardness. You may need a whole home water filter if it is outside of normal ranges. A pretty easy DIY project and relatively inexpensive at the big box stores

Odd for both to be out. Check the water supply sometimes corrosion or scale will block the saddle piercing valve. Run it all the way into the pipe. Usually need to spin the little valve handle clockwise. Then back it all the way back to full open and reset humidifier power and furnace power. After that may want to crack open water supply connection right before the solenoid at each humidifier to make sure water is getting to them.

The clicking is just the water valve opening. Normal. The other issue could be wiring. Some of these were easy to miswire.

do you have a test mode on your humidistat? does it turn on when you put it to test?

the float may be bad or sticking allowing water to run continusly even when unit is off.

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.

Here is a link to your humidifier http://www.iaqsource.com/article.php/my-aprilaire-humidifier-is-leaking-what-to-do-about-it./?id=35

Shut off the main water valve and open some cold water faucets to relieve the pressure. Remove the entire saddle valve and make sure the piercing needle does not remain in the water pipe. Purchase and install a non self-piercing saddle valve and follow the directions. You will need a power drill and 1/4" drill bit for the install. Use teflon tape or paste on the treaded fittings. Test for leaks.

Hello, typically solenoid valves should be replaced every 7 years and they are not very difficult to replace. Just need to shut off water at saddle valve, turn off power to humidifier, and remove mounting hardware. Here is a link to store which sells the solenoid needed for your humidifier. http://www.aprilairehumidifierparts.com/product.php?p=aprilaire_4005&product=111011&category=1686

That will work, The HUM feeds power to the humidifier when the fan is operating even in cooling on most models, However the humidistat must also be calling for humidity and probally won't call during the cooling months

Depending on the age of your furnace you may have an aux terminal for a humidifier. If not, you should use the white wire (heat) coming from the homes thermostat to power up the humidistat and ultimately bring on the humidifier. This way it will only run when in heating mode.

Is this a newly installed humidifier?