Question about Aprilaire 700 Humidifier

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Not operating-controller questions

I have a model 700 with the automatic controller. It has operated fine for 3 years, but just changed to heat 2 weeks ago and is not operating. I checked it in test mode and nothing happens other than the controller green light blinks as is normal for test. The solenoid does not click, no water appears and the fan does not run. I checked voltages and the R/C terminals have the correct 24 volts. There is no voltage to the unit from the H terminals, whether idle or running in test. the ODT terminals show 5 volts. Should the H terminals show 24 volts when in test mode to activate the humidifier? I suspect the controller is the issue. Any fixes or just replace?

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  • Anonymous Nov 23, 2008

    Model 700 automatic controller is not working. It just clicks but does not power the fan or actuate the solenoid. If you bypass the controller the ubit works fine. Has worked for two years. I actually have two units with auto control and both are not working this year. Aprilaire said I need new controllers. Seems fishy that both go at the same time. Thanks.

  • harryjjackso Nov 25, 2008

    My controller does nothing

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Are you having problems with your fan blade rotating in the wrong direction? Is yours pushing or pulling water through the water panel? I am very unhappy with my humidity levels in my house.

Posted on Nov 23, 2008

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Replaced water panel and the light keeps blinking to change it agai...model 700


Sorry to read about your problem, I hope this helps you out.
did you hit the reset

Digital Humidifier Control (Model 700): (Automatic or Manual mode) Check system operation and reset Change Water Panel indicator by setting the knob to "Test/Reset". With HVAC blower operating and HVAC calling for heat, humidifier will operate for one minute. DO NOT LEAVE IN TEST MODE AS HUMIDIFIER WILL NOT OPERATE.

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Dec 29, 2010 | Aprilaire 700 Humidifier

1 Answer

Not working


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....

Nov 17, 2010 | Aprilaire 700 Humidifier

1 Answer

I have lost my manual. readout on the digital display is CF. humidifier operates fine. what does the display CF mean?jiml@suddenlink.net


It means Change Filter.

However, assuming that you have done that in the recent past, you probably want to know more. I'm not sure how this actually works (that is why it shows CF). I saw it for the first time after 2 or 3 years of using my humidifier. (And I had just changed the filter a week or so previously).

You may have to turn the unit off/on or even unplug it to clear the message, then it should operate normally.

Nov 05, 2010 | Emerson HDC12 Humidifier

1 Answer

Aprilaire 700. It works on fan on mode but not otherwise. It's never on and the humidity reading is always way below the setting. It should turn on automatically to bring the humidity up, right?


It appears your Aprilaire model 700 is wired to only operate when your HVAC fan is operated by your thermostat. Your HVAC installer can wire the humidifier control to operate the humidifier during a heat call, fan call or to turn on the fan when there is a need for humidification. Please contact your HVAC installer to have them change the wiring.

Thank you for giving us the opportunity to be of service
Sincerely,

Brad Uselmann
Technical Support
Research Products Corporation
www.aprilaire.com

Nov 01, 2010 | Aprilaire 700 Humidifier

1 Answer

Change water pad but change water panel light is on


Turn the control knob to the
“Test/Reset” position until the “Change
Water Panel” light blinks to reset the
water panel change indicator timer.
(Blower must be operating and furnace
calling for heat.) Be sure to turn the
control knob back to the prior setting when finished

Oct 27, 2009 | Aprilaire 700 Humidifier

1 Answer

Aprilaire Model 700 - not achieving 40% humidity


if it is set up right, you should be able to run your fan 100% of the time and the humidifier will come on when there is a need for humidity. you can experiment with leaving the fan on and see if this helps. it will run your electric bill up a little and also you will have a lot of waste water. that is a drawback to the bypass type humidifiers. also a factor is if the water supply is hooked up to the hot or cold side. it will humidify better on the hot side, but you tend to get more deposits that plug the solenoid over time and you will be running your water heater quite a bit. 1600 sqft may be pushing the limit of this humidifier.

Jan 24, 2009 | Aprilaire 700 Humidifier

2 Answers

Aprilaire 700 humidifier not adding any humidity


Thanks for your Question,
Sounds to me like you have a calcium build up in the Solenoid, which is restricting flow to the unit for proper operation, you might even have a bit of restriction in the copper line feeding the Solenoid, replacement of the solenoid would probably take care of your problem, one quick tip, in the spring and summer months, its a good idea to shut the water off to the unit, this should make the Solenoid last a little longer, hope this was helpful to ya, please let me know, thanks again,
mr.grzz

Jan 12, 2009 | Aprilaire 700 Humidifier

1 Answer

Aprilaire 700 problem


I can't exactly recall--once I fixed it, I erased it from my memory! However, you need to have power off to check continuity; at least on my meters I'll blow its little internal fuse if there is any voltage. As I recall, one of the main indicators for switch failure was that the switch failed to click/engage. Hope this helps. I was able to contact their tech services to get advice.

Nov 02, 2008 | Aprilaire 700 Humidifier

1 Answer

Water panel light


The reset is to place the controller in the "test/reset" position. The furnace must be in heat mode and operating at the time. The green light will blink for about 1 minute if operating properly, then cut off when placed in a normal setting.

Oct 19, 2008 | Aprilaire 700 Humidifier

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